| Entries |
| Document | Title | Date |
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| 20100060375 | BALUN CIRCUIT MANUFACTURED BY INTEGRATE PASSIVE DEVICE PROCESS - A Balun circuit manufactured by integrate passive device (IPD) process. The Balun circuit includes a substrate, a first coplanar spiral structure, and a second coplanar spiral structure. One end of the innermost first left coil of the first coplanar spiral structure is electrically connected to the innermost first right coil through a first bridge. Two ends of the first coplanar spiral structure are electrically connected to the outermost first left coil and the outermost right coil respectively. One end of the innermost second left coil of the second coplanar spiral structure is electrically connected to the innermost second right coil through a second bridge. Two ends of the second coplanar spiral structure are electrically connected to the outermost second left coil and the outermost second right coil respectively. The first left coils and the second left coils are interlaced. The first right coils and the second right coils are interlaced. | 03-11-2010 |
| 20110204990 | METHODS AND APPARATUS FOR A SWITCHABLE BALUN FOR COMBINED BLUETOOTH AND WLAN OPERATION - Methods and apparatus for a switchable balun for combined Bluetooth and WLAN operation. A switchable balun is provided that includes an input circuit for receiving an amplified signal, the input circuit comprising first and second coils connected at a center tap, an output circuit comprising a third coil that is inductively coupled to the first and second coils, the output circuit for outputting an adjusted version of the amplified signal for transmission in a selected transmission mode, and a switch coupled to the center tap, wherein the switch is configured to couple a first voltage to the center tap to select operation in a first transmission mode and to couple a second voltage to the center tap to select operation in a second transmission mode. | 08-25-2011 |
| 20090195324 | BALUN TRANSFORMER WITH IMPROVED HARMONIC SUPPRESSION - An electronic assembly includes a substrate ( | 08-06-2009 |
| 20100052808 | ACTIVE BALUN CIRCUIT - An active balun circuit is provided, which includes an input end, a first and a second output ends, a first and a second transistors, a feedback capacitor, and a current source. The input end receives an input signal. A drain of the first transistor is coupled to the second output end, and a gate of the first transistor is coupled to the input end. A gate of the second transistor is coupled to a ground end, and a drain of the second transistor is coupled to the first output end. The feedback capacitor is coupled between the second output end and the gate of the second transistor. One end of the current source is coupled to sources of the first and second transistors, and the other end of the current source is coupled to the ground end. | 03-04-2010 |
| 20100026411 | BALUN SIGNAL TRANSFORMER AND METHOD OF FORMING - A balanced-unbalanced (balun) signal transformer includes an unbalanced port, a balanced port coupled to the unbalanced port, the balanced port comprising a first terminal and a second terminal, a first capacitor coupled to the first terminal, a first inductor coupled to ground and the first capacitor, a second capacitor coupled to the second terminal, and a second inductor coupled to ground and the second capacitor. The transformer may also include a third capacitor coupled to a terminal of the unbalanced port; and a third inductor coupled to the third capacitor and the third terminal. | 02-04-2010 |
| 20080258837 | BALUN SIGNAL TRANSFORMER | 10-23-2008 |
| 20130033336 | UNBALANCED-BALANCED CONVERSION CIRCUIT ELEMENT - An unbalanced-balanced conversion circuit element includes an inductor connected in series between an unbalanced terminal and a first balanced terminal. The first balanced terminal side of the inductor is grounded via a capacitor. A capacitor is connected in series between the unbalanced terminal and a second balanced terminal. An inductor is connected between the first balanced terminal side of the inductor and the second balanced terminal side of the capacitor. In a laminate defining the unbalanced-balanced conversion circuit element, the capacitor is spaced far from a mounting surface of the laminate in comparison with other circuit elements. | 02-07-2013 |
| 20100045399 | BALANCED ACOUSTIC WAVE FILTER DEVICE AND COMPOSITE FILTER - An acoustic wave filter device which attains improved balancing between transmission characteristics of first and second balanced terminals includes first and second 3-IDT longitudinally coupled resonator type acoustic wave filter elements that are connected to an unbalanced terminal in parallel, and one terminal of a first IDT and one terminal of a fourth IDT are connected to each other and further connected to the unbalanced terminal, second and third IDTs are connected to each other and further connected to a first balanced terminal, fifth and sixth IDTs are connected to each other and further connected to a second balanced terminal, and a first ground line which electrically connects the second IDT which is nearer to a first ground terminal than the third IDT to the second ground terminal is longer than a second ground line which electrically connects the fifth IDT which is nearer to the first ground terminal than the sixth IDT to the first ground terminal. | 02-25-2010 |
| 20100045398 | Miniaturized Wide-Band Baluns for RF Applications - A wide-band balun device includes a first metallization deposited over a substrate and oriented in a first coil. The first coil extends horizontally across the substrate while maintaining a substantially flat vertical profile. A second metallization is deposited over the substrate and oriented in a second coil. The second coil is magnetically coupled to the first coil and a portion of the second coil oriented interiorly of the first coil. A third metallization is deposited over the substrate and oriented in a third coil. The third coil is magnetically coupled to the first and second coils. A first portion of the third coil is oriented interiorly of the second coil. The third coil has a balanced port connected to the third coil between second and third portions of the third coil. | 02-25-2010 |
| 20100045397 | Resonator Filter Working With Surface Acoustic Waves - A resonator filter working with surface acoustic waves is disclosed. The transfer function of this filter features a phase rotation of at least 400° within a passband. | 02-25-2010 |
| 20100045396 | Thin film balun - The present invention provides a thin film balun according to an embodiment of the present invention includes: an unbalanced transmission line which includes two coils; a balanced transmission line which includes two coils and is electromagnetically coupled to the unbalanced transmission line; a capacitor having one end connected to the balanced transmission line; and a ground terminal | 02-25-2010 |
| 20090212879 | METHOD AND SYSTEM FOR A BALUN EMBEDDED IN AN INTEGRATED CIRCUIT PACKAGE - Methods and systems for a balun embedded in an integrated circuit package are disclosed and may include a multi-layer package bonded to an integrated circuit. The multi-layer package may include an integrated balun which may be enabled to process RF signals received from and/or communicated to an antenna. The integrated circuit may be flip-chip bonded to the multi-layer package. The balun may include ferromagnetic layers integrated in the multi-layer package, and may be bypassed via bypass switches integrated in the multi-layer package. The switches integrated in the multi-layer package may include MEMS switches. The balun may be bypassed via bypass switches in the integrated circuit. The switches in the integrated circuit may include CMOS switches. The balun may be impedance matched to the integrated circuit via surface mount devices, which may be coupled to the multi-layer package. | 08-27-2009 |
| 20090273411 | METHOD AND SYSTEM FOR FLIP CHIP CONFIGURABLE RF FRONT END WITH AN OFF-CHIP BALUN - Methods and systems for a flip chip configurable RF front end with an off-chip balun may include bonding a balun package to a single integrated circuit (IC) comprising an integrated transmitter and a receiver. The balun package may comprise one or more layers and may be electrically coupled to the IC. The balun package may comprise various devices such as, for example, inductors, capacitors, resistors, and/or switches, which may be on an exterior surface and/or inner layers of the balun package. Accordingly, the balun package and/or the IC may be configured for receiving RF signals and/or transmitting RF signals. The balun package and/or the IC may also be configured for single-ended RF input, single-ended RF output, differential RF input, and/or differential RF output. An off-chip amplifier may be used to amplify signals on the single transmit line in the single-ended RF output mode of operation. | 11-05-2009 |
| 20090302967 | Tapered double balun - Disclosed is a tapered double balun for use with rotationally-symmetrical, frequency-independent antennas that are fed using spiral-mode number 2. The tapered double balun may be used to provide a four-terminal line, where all terminals carry the same voltage, but adjacent terminals are out of phase and opposite terminals are in phase. The antennas may be spirals, sinuous, or other four-arm antennas. The tapered double balun is a stripline device comprising two outer ground planes and a center conductor that is dielectrically separated from the ground planes. The outer ground planes each taper from a wide dimension at the connector end of the device to a narrow dimension at the antenna end of the device. The narrow opposing strips comprising the ground planes are configured to connect to two opposed arms of the antenna. The center conductor is a single conductor at the connector end of the device that tapers to a larger conductor at the antenna end or may bifurcate to form two laterally separated conductors at the antenna end of the device. The center conductor is configured so that, whether single or bifurcated, it connects to the two remaining opposed arms of the antenna. | 12-10-2009 |
| 20090039977 | BALUN TRANSFORMER - A balun transformer includes a first conductive pattern having one end provided as an input/output port of an unbalanced signal, a second conductive pattern electromagnetically coupled to the first conductive pattern and having both ends provided as input/output ports of a balanced signal, and a first variable capacitor connected between a ground part and a middle part of an electrical length of the second conductive pattern. | 02-12-2009 |
| 20130063221 | ARRANGEMENT FOR PROCESSING A NON-SYMMETRICAL AND A SYMMETRICAL SIGNAL - An arrangement for processing a non-symmetrical signal includes an apparatus configured to balance and filter an image frequency of a nominal frequency of the non-symmetrical receiving signal. The apparatus includes a modified Boucherot bridge having a series or parallel oscillating circuit that replaces inductive or capacitive components of a conventional Boucherot bridge, such that the modified Boucherot bridge is in the harmonized state with the image frequency to be faded out and has a predetermined impedance with the nominal frequency on its symmetrical output terminals. The nominal frequency has a predetermined impedance on its symmetrical output terminals. The nominal frequency is transmitted as a signal balanced to ground to the symmetrical output terminals of the modified Boucherot bridge. | 03-14-2013 |
| 20090237176 | Thin film balun - There is provided a thin film balun which, while incorporating a capacitor used to supply a DC bias, allows improvement of various required characteristics. | 09-24-2009 |
| 20090237175 | Compact balun transformers - Balun transformers are described wherein multiple transformer loops are implemented in a stacked design with the primary and secondary loops overlying one another. By aligning the loops in a vertical direction, instead of offsetting the loops, the area of the device is reduced. Multiple transformer loops are nested on each level, and the transformer loops on a given level are connected together using a crossover located on a different level. | 09-24-2009 |
| 20080303606 | Miniaturized Wide-Band Baluns for RF Applications - A wide-band balun device includes a first metallization deposited over a substrate and oriented in a first coil. The first coil extends horizontally across the substrate while maintaining a substantially flat vertical profile. A second metallization is deposited over the substrate and oriented in a second coil. The second coil is magnetically coupled to the first coil and a portion of the second coil oriented interiorly of the first coil. A third metallization is deposited over the substrate and oriented in a third coil. The third coil is magnetically coupled to the first and second coils. A first portion of the third coil is oriented interiorly of the second coil. The third coil has a balanced port connected to the third coil between secondhand third portions of the third coil. | 12-11-2008 |
| 20100231316 | Hybrid marchand/back-wave balun and double balanced mixer using same - A hybrid Marchand/back-wave balun includes a first pair of coupled sections having a first primary section and first secondary section; a second pair of coupled sections having a second primary section and second secondary section; a first reactance interconnecting the first and second primary sections and a second reactance interconnecting the first and second secondary sections; one of the reactances being open at high frequency and shorted at low frequency, the other reactance being shorted at high frequency and open at low frequency for selectively providing low frequency Marchand/high frequency back-wave function and high frequency Marchand/low frequency back-wave function; and a double balanced mixer using same. | 09-16-2010 |
| 20110316642 | MODULE - A module includes a substrate including an IC disposed on an upper surface side thereof. The IC includes a modulation circuit unit arranged to modulate a baseband signal into an RF signal and a demodulation circuit unit arranged to demodulate an RF signal into a baseband signal. The substrate includes a first wiring layer provided on the upper surface side, a second wiring layer disposed on a lower surface side of the first wiring layer, and an insulator layer disposed between the first wiring layer and the second wiring layer. A baseband signal-use wiring pattern is provided in the first wiring layer, an RF signal-use wiring pattern is provided in the second wiring layer, and on one surface of the insulator layer, a substantially flat-plate ground electrode pattern is arranged to cover substantially an entire surface. At least a balun is provided in the second wiring layer and defined by the RF signal-use wiring pattern, and when viewed in a top view, at least a portion of the RF signal-use wiring pattern defining the balun is arranged on an upper surface side of the second wiring layer so as to surround a connecting wiring electrically connecting an RF terminal of the IC and a balanced-side terminal of the balun to each other. | 12-29-2011 |
| 20110291768 | TRANSFORMING CIRCUIT - A transforming circuit includes: a first winding having a first port and a second port operably coupled for a differential signal; and a plurality of second windings, each having a third port and a fourth port operably coupled for a single-ended signal when magnetically coupled to the first winding. When one of the second windings is magnetically coupled to the first winding, each remaining second winding(s) is not magnetically coupled to the first winding. | 12-01-2011 |
| 20090085689 | Digitally tuned, integrated baluns with enhanced linearity for multi-band radio applications - An integrated balun includes a low pass filter and a high pass filter that are formed on a semiconductor chip using tunable reactive elements. The outputs of the low pass filter and the high pass filter are tied together to form the single ended output of the balun. The inputs of the low pass filter and the high pass filter form the differential inputs of the balun. The low pass filter and the high pass filter each include a number of tunable networks for achieving the tunable reactive elements. Each tunable network includes at least one switching transistor and at least one fixed value reactive elements. In at least one embodiment, dynamic biasing circuitry may be provided to improve the linearity and reduce the insertion loss of the balun. | 04-02-2009 |
| 20120139658 | Imbalance Detection and Reduction for Wideband Balun - A circuit converts a single-ended signal to differential signals that are balanced to have the same amplitudes and opposite phases. The circuit includes a balance tunable balun, a detector, and a controller. The balance tunable balun has a primary winding, a secondary winding, a control input, and a switched resistor-capacitor (RC) network. The primary winding receives the single-ended signal and the secondary winding outputs the differential signals. The control input receives a control signal and the switched RC network tunes an output imbalance of the balun responsive to this control signal. The detector detects the output imbalance and the controller generates the control signal to control the switched RC network to reduce that output imbalance. The circuit produces well balanced differential signals over a wide range of signal frequencies, even when asymmetries, process variations, or parasitic capacitance in the balun would otherwise result in imbalance. | 06-07-2012 |
| 20110169586 | MULTILAYER BALANCED FILTER - A multilayer balanced filter includes a first coil including a first straight line electrode and via electrodes. A first capacitor, a second capacitor, and a third capacitor are provided respectively between a ground electrode and a first capacitor electrode, between the ground electrode and a second capacitor electrode, and between the ground electrode and a third capacitor electrode. The first coil and the first capacitor constitute an LC resonator. A second straight line electrode is arranged in parallel or substantially in parallel with the first straight line electrode, and a second coil and a third coil, each having a loop plane perpendicular or substantially perpendicular to the loop plane of the first coil, are provided. A second capacitor and a third capacitor are respectively connected between balanced output terminals and the ground. | 07-14-2011 |
| 20090284323 | BROADBAND TRANSMISSION LINE TRANSFORMER - A broadband transmission line impedance transformer performs impedance transformation with improved frequency response and efficiency across a wide operational bandwidth. In particular, the bandwidth of a transmission line 2:1 impedance transformer may be significantly increased by adding an additional compensating capacitor as an internal component between interconnected transmission lines. This capacitor effectively improves low frequency response for a given length of transmission lines and decreases mismatch in an entire frequency range. The overall bandwidth ratio increases at least twice and mismatch decreases. | 11-19-2009 |
| 20090102574 | MATRIX BALUN - An active input matrix balun and a method for the same. The matrix balun has one input transmission line with an RF-in terminal for receiving a single ended RF-in signal and a first output transmission line with a first RF-out terminal and an adjacent second output transmission line with a second RF-out terminal. Two balanced RF-out signals at the first and at the second RF out terminal, where each RF-out signal has an amplitude level equal to or exceeding the amplitude level of the Rein signal and where the RF-out signals have a mutual phase difference of 180° and are of equal amplitude levels. | 04-23-2009 |
| 20090261921 | BALANCE FILTER - A balance filter includes two acoustic wave filters connected between a single unbalanced terminal and two balanced terminals, and a ground terminal connected to the two acoustic wave filters via a first interconnection portion and a second interconnection portion. The first interconnection portion is connected to the two acoustic wave filters, and the second interconnection portion is connected to the first interconnection portion in a region that is located between the two acoustic wave filters and extends in a direction orthogonal to a direction in which the two acoustic wave filters are aligned. | 10-22-2009 |
| 20080238568 | Package embedded three dimensional balun - Methods and apparatus relating to package embedded three dimensional baluns are described. In one embodiment, components of one or more baluns may be embedded in a single semiconductor substrate. Other embodiments are also described. | 10-02-2008 |
| 20080278258 | INTEGRATED CIRCUIT HAVING RE-CONFIGURABLE BALUN CIRCUIT AND METHOD THEREFOR - A balun circuit comprises a balun transformer having first and second windings, and first and second variable capacitors. The first variable capacitor has a first plate electrode coupled to the first terminal of the first winding, and a second plate electrode coupled to the second terminal of the first winding. The second variable capacitor has a first plate electrode coupled to the first terminal of the second winding, and a second plate electrode coupled to the second terminal of the second winding. The first variable capacitor is tunable between first and second capacitance values. The second variable capacitor is tunable between third and fourth capacitance values. Tuning the variable capacitors allows the balun circuit to be re-configurable to operate in both the first frequency band and the second frequency band. | 11-13-2008 |
| 20080303607 | BALANCED FILTER DEVICE - A balanced filter suitable for a reduction of the filter size. The balanced filter comprises strip-line resonators (SL | 12-11-2008 |
| 20080231388 | Broadband Balancing Transformer - A balance-to-unbalance transformer (balun) comprising a first signal input/output with two symmetrical poles, a second signal input with one pole, several first conductor loop regions, which are located between the two poles of the first signal input and the ground and a second series connection of several conductor loop regions, the first terminal of the latter being connected to the pole of the second signal input. Two second conductor loop regions are electromagnetically coupled to a respective conductor loop region. The second outer terminal of the second series connection of several second conductor loop regions is electrically connected to the intermediate terminal of a first series connection of several first conductor loop regions, which connect a symmetrical pole of the first signal input to the ground. | 09-25-2008 |
| 20080246552 | Balanced Acoustic Wave Filter Device - A surface acoustic wave filter device includes an unbalanced terminal, first and second balanced terminals, and first, second and third IDTs. One end of the first IDT and one end of the third IDT are connected to the unbalanced terminal. The second IDT includes first and second divided IDT portions obtained by dividing the IDT in the surface wave propagating direction. The first and second divided IDT portions include sub-divided IDT portions and sub-divided IDT portions obtained by dividing the first and second divided IDT portions and in the crossing width direction. The first and second divided IDT portions are electrically connected in series. The first and second sub-divided IDT portions are electrically connected in series. The first and second sub-divided IDT portions are electrically connected in series. The second sub-divided IDT portion is connected to the first balanced terminal and the second sub-divided IDT portion is connected to the second balanced terminal. | 10-09-2008 |
| 20080258838 | MULTILAYER BALUN, HYBRID INTEGRATED CIRCUIT MODULE, AND MULTILAYER SUBSTRATE - A multilayer balun comprises first and second transmission lines that constitute a half-wave transmission line are opposed in adjacent layers, with a dielectric substance therebetween, so that, during use, the current of the first transmission line and the current of the second transmission line flow in the same direction. Thus, magnetic shield is formed between the first and second transmission lines. This eliminates the need for a grounding electrode layer for preventing magnetic interference between the first and second transmission lines. | 10-23-2008 |
| 20110012690 | THIN FILM BALUN - A thin film balun that can be made smaller and thinner while maintaining required balun characteristics is provided. A thin film balun | 01-20-2011 |
| 20090160573 | GFCI-Compatible Circuit for Plasma Cutting System - In one embodiment, a system is provided that includes a GFCI compatibility control configured to filter noise, improve symmetry between lines, or a combination thereof, when connecting a device to a GFCI-protected power source. In another embodiment a circuit for a torch power unit is provided that includes an inductor comprising a first coil and a second coil, wherein the total inductance for the first coil is substantially the same as the total inductance for the second coil, and a plurality of capacitors coupled to both the first and second coils. Another system is provided that includes a torch power unit. The torch power unit includes a compressor, a motor coupled to the compressor, and a GFCI compatibility control configured to filter noise, improve symmetry between lines, or a combination thereof, when connecting a device to a GFCI-protected power source. | 06-25-2009 |
| 20120068782 | Method and System for Configurable Differential or Single-Ended Signaling in an Integrated Circuit - Aspects of a method and system for configurable differential or single-ended signaling in an integrated circuit. In this regard, a balun comprising one or more loops fabricated in a plurality of metal layers in an integrated circuit may enable conversion between unbalanced and balanced signals. In this regard, balanced signal output by a power amplifier may be converted to a balanced signal for transmission via an antenna. Similarly, an unbalanced signal received by an antenna may be converted to a balanced signal for amplification by an amplifier with a balanced input. The loops may be fabricated in transmission line media such as microstrip and/or stripline. The loops may comprise ferromagnetic material which may be deposited on and/or within the IC. Signals converted via the balun may be in the 61 GHz-61.5 GHz ISM band. | 03-22-2012 |
| 20090051459 | FILTER - A filter is provided with one unbalanced input terminal, a first balanced output terminal and a second balanced output terminal. A primary coil is connected between a connecting point, which is of a second capacitor and a third capacitor, and GND. Furthermore, a secondary coil is connected between the first balanced output terminal and the second balanced output terminal, and the primary coil and the secondary coil are magnetically coupled. | 02-26-2009 |
| 20090243749 | METHOD AND SYSTEM FOR CONFIGURABLE DIFFERENTIAL OR SINGLE-ENDED SIGNALING IN AN INTEGRATED CIRCUIT - Aspects of a method and system for configurable differential or single-ended signaling in an integrated circuit. In this regard, a balun comprising one or more loops fabricated in a plurality of metal layers in an integrated circuit may enable conversion between unbalanced and balanced signals. In this regard, balanced signal output by a power amplifier may be converted to a balanced signal for transmission via an antenna. Similarly, an unbalanced signal received by an antenna may be converted to a balanced signal for amplification by an amplifier with a balanced input. The loops may be fabricated in transmission line media such as microstrip and/or stripline. The loops may comprise ferromagnetic material which may be deposited on and/or within the IC. Signals converted via the balun may be in the 61 GHz-61.5 GHz ISM band. | 10-01-2009 |
| 20090315636 | BALANCED-TO-UNBALANCED TRANSFORMER AND AMPLIFIER CIRCUIT MODULE - A balanced-to-unbalanced transformer includes a +90° phase shift circuit, which is disposed between a branch point connected to an unbalanced terminal and a first terminal, and a −90° phase shift circuit, which is disposed between the branch point and a second terminal. A first inductor is connected between the first terminal and a power supply terminal, and a second inductor is connected between the branch point and the power supply terminal. A power-supply-terminal-side capacitor is connected in shunt between the power supply terminal and a ground. A second-terminal-side series inductor is connected in series between the branch point and the second terminal. | 12-24-2009 |
| 20090045885 | PASSIVE STRUCTURE FOR HIGH POWER AND LOW LOSS APPLICATIONS - An integrated circuit radio transceiver and method therefor includes a balun formed to have interleaved traces which is operable to satisfy high current density requirements while reducing resistive and capacitive reactance of the balun to minimize coupling losses and to maintain efficiency. The interleaved traces may be selectively coupled according to design and application requirements. | 02-19-2009 |
| 20090072923 | LAMINATED BALUN TRANSFORMER - A laminated balun transformer that may be used for lines having various impedances includes a first magnetic substrate, a laminated body, a second magnetic substrate, and external electrodes. The laminated body includes a first transformer, a second transformer, and an insulator that covers the first and second transformers. The first transformer includes a primary coil and a secondary coil. The second transformer includes a primary coil and a secondary coil. The line width of the primary coil of the first transformer is set so as to decrease from the side of the internal electrode towards the side of the internal electrode. The line width of the secondary coil of the second transformer is also set so as to decrease from the side of the internal electrode towards the side of the internal electrode. | 03-19-2009 |
| 20090160574 | BOUNDARY ACOUSTIC WAVE FILTER - A boundary acoustic wave filter device includes an electrode structure provided at a boundary between a piezoelectric body and a dielectric body laminated on the piezoelectric body and utilizes an SH-type boundary acoustic wave that propagates along the boundary. In the boundary acoustic wave filter device, the electrode structure includes a longitudinally coupled resonator boundary acoustic wave filter portion that has a first IDT and second and third IDTs arranged respectively on both sides of the IDT in a direction in which the boundary acoustic wave propagates. At portions at which two IDTs are located adjacent to each other in the direction in which the boundary acoustic wave propagates, narrow pitch electrode finger portions are provided in the IDTs, and the pitch of the electrode fingers of the narrow pitch electrode finger portion is different from the pitch of the electrode fingers of each of the narrow pitch electrode finger portions. | 06-25-2009 |
| 20090115547 | BOUNDARY ACOUSTIC WAVE FILTER - A longitudinally coupled resonator boundary acoustic wave filter device includes a piezoelectric substrate made of LiNbO | 05-07-2009 |
| 20110128088 | RF SWITCHABLE BALUN - A handheld communication device having an RF front end module has a switchable balun comprising a primary winding having a first two port winding and a second two port winding where a low noise amplifier is operatively coupled to the first and second two port windings and a power amplifier is operatively coupled to the first and second two port windings. A secondary winding is operatively coupled to an antenna, and a transceiver is operatively coupled to the low noise amplifier and the power amplifier. When the switchable balun is in a receive state, the antenna is operatively coupled to the transceiver through the low noise amplifier, and when the switchable balun is in a transmit state, the antenna is operatively coupled to the transceiver through the power amplifier. The ratio of the primary winding to the secondary winding is greater than a one-to-one ratio | 06-02-2011 |
| 20110241793 | Semiconductor Device and Method of Forming RF Balun Having Reduced Capacitive Coupling and High CMRR - A semiconductor device has an RF balun formed over a substrate. The RF balun includes a first conductive trace wound to exhibit inductive properties with a first end coupled to a first terminal of the semiconductor device and second end coupled to a second terminal of the semiconductor device. A first capacitor is coupled between the first and second ends of the first conductive trace. A second conductive trace is wound to exhibit inductive properties with a first end coupled to a third terminal of the semiconductor device and second end coupled to a fourth terminal of the semiconductor device. The first conductive trace is formed completely within the second conductive trace. The first conductive trace and second conductive trace can have an oval, circular, or polygonal shape separated by 50 micrometers. A second capacitor is coupled between the first and second ends of the second conductive trace. | 10-06-2011 |
| 20100066462 | ACOUSTIC WAVE FILTER DEVICE - An acoustic wave filter device having a greatly reduced size includes a balance-unbalance conversion function and an input/output impedance ratio of about 1. The acoustic wave filter device includes a second IDT of a first acoustic wave filter portion that is connected to an unbalanced terminal. The second IDT includes first and second divided IDT portions which are divided in an overlap width direction and connected in series with each other between the unbalanced terminal and a ground potential. A fifth IDT of a second acoustic wave filter portion connected to the first acoustic wave filter portion includes first and second divided IDT portions which are divided in an acoustic wave propagating direction. The first and second divided IDT portions of the fifth IDT are connected to first and second balanced terminals, respectively. | 03-18-2010 |
| 20100060376 | BALUN DEVICE - A balun device including a first to a third inductance elements and a first to a third capacitance elements is provided. The first inductance element has a first end for receiving an input signal and a second end. The second inductance element has a third end and a fourth end, wherein the third and the forth ends are for outputting a first and a second output signals corresponding to the input signal, respectively. The first output signal and the second output signal substantially have the same amplitude and opposite phases. The first and the second inductance elements generate mutual inductance. The first capacitance element is coupled to the first end. The second capacitance element is coupled to the third end. The third capacitance element is coupled to the fourth end. The third inductance element is seriesly connected to one of the first to the third capacitance elements. | 03-11-2010 |
| 20110148542 | TRANSFORMER AND METHOD FOR USING SAME - Method for improving the symmetry of the differential output signals of an integrated transformer of the symmetric-asymmetric type comprising an inductive primary circuit and an inductive secondary circuit, characterized in that the capacitive coupling between the primary and secondary circuits is reduced. | 06-23-2011 |
| 20090167455 | Semiconductor Device Having Balanced Band-Pass Filter Implemented with LC Resonator - A band-pass filter has a plurality of frequency band channels each including a first inductor having a first terminal coupled to a first balanced port and a second terminal coupled to a second balanced port. A first capacitor is coupled between the first and second terminals of the first inductor. A second inductor has a first terminal coupled to a first unbalanced port and a second terminal coupled to a second unbalanced port. The second inductor is disposed within a first distance of the first inductor to induce magnetic coupling. A second capacitor is coupled between the first and second terminals of the second inductor. A third inductor is disposed within a second distance of the first inductor and within a third distance of the second inductor to induce magnetic coupling. A second capacitor is coupled between first and second terminals of the third inductor. | 07-02-2009 |
| 20100097154 | Broadband Active Balun - A broadband active balun configuration is provided. According to embodiments, the subject active balun can include a cascade and cascade transistor pair using a shared input transistor. In a further implementation, a low-pass bias-feedback mechanism for maintaining stable bias conditions can be provided. | 04-22-2010 |
| 20090140822 | Toolless video balun - A toolless video balun is disclosed to include a bottom cover shell covered with a top cover shell to hold a circuit board and a BNC connector, two metal terminals bonded to the circuit board with the respective sharp-edged top metal holder portions respectively inserted into respective insertion slot in a terminal block at the top cover shell, and a pressure cap pivoted to the top cover shell for holding down electrical wires of a network line in wire grooves in the terminal block for causing the metal holder portions of the metal terminals to make contact with conductors of the electrical wires of the network line respectively. | 06-04-2009 |
| 20120013417 | Center-tapped Inductor Balun - An electronic balun circuit is provided for converting a single-ended signal into a differential signal and vice versa, comprising a center-tapped inductor having a first node, a center-tap coupled to a constant voltage source, and a second node. A first impedance circuit is coupled with the first node and with a line carrying single-ended signal to and from the first node. A second impedance circuit is coupled with the second node. The first node receives the single-ended signal to produce a differential signal at the first and second nodes. The first and second nodes receive the differential signal to produce the single-ended signal at the first node. Both first and second impedance circuits have an impedance of 2R | 01-19-2012 |
| 20090134950 | PASSIVE COMPONENT - A passive component is provided with a filter section employing a nonequilibrium input/output system, which has an input side resonator connected to a nonequilibrium input terminal, and an output side resonator coupled with the input side resonator; and a converting section having two double line coupled lines. An output stage of the filter section is connected with an input stage of the converting section through a first capacitor, and an input stage of the filter section is connected with the input stage of the converting section through a second capacitor. Namely, the second capacitor functions as a jump capacitor. The position of an attenuation pole is permitted to be adjusted by a second capacitor in a region low in frequency characteristics. | 05-28-2009 |
| 20120206212 | Slide-Type Mobile Terminal and Signal Processing Method Thereof - A slide type mobile terminal and a method for processing signals thereof are disclosed in the present invention, wherein, a built-in auxiliary antenna is installed in an upper slide portion ( | 08-16-2012 |
| 20100007430 | BALANCED-UNBALANCED CONVERSION CIRCUIT - A balanced-unbalanced conversion circuit includes a first coupling line, an unbalanced terminal connected to the first coupling line, a ground terminal connected to the unbalanced terminal through the first coupling line, a second coupling line electromagnetically coupled to the first coupling line, a first balanced terminal connected to the second coupling line, a second balanced terminal connected to the first balanced terminal through the second coupling line, and a band-reject filter serially connected to the first coupling line to remove predetermined-band signals of high frequency signals transmitted through the first coupling line. | 01-14-2010 |
| 20120081190 | SIGNAL SPLITTER FOR USE IN MOCA/CATV NETWORKS - There is provided a splitter circuit for use with a CATV network comprising a signal input in communication with a balun to supply two signal outputs, a resistor connected in parallel between the outputs, and capacitive, inductive, and resistive elements associated with the resistor, thereby to give an insertion loss in to out in the range of 3 to 10 dB. | 04-05-2012 |
| 20100231317 | Semiconductor Device and Method of Integrating Balun and RF Coupler on a Common Substrate - A semiconductor die has an RF coupler and balun integrated on a common substrate. The RF coupler includes first and second conductive traces formed in close proximity. The RF coupler further includes a resistor. The balun includes a primary coil and two secondary coils. A first capacitor is coupled between first and second terminals of the semiconductor die. A second capacitor is coupled between a third terminal of the semiconductor die and a ground terminal. A third capacitor is coupled between a fourth terminal of the semiconductor die and the ground terminal. A fourth capacitor is coupled between the high side and low side of the primary coil. The integration of the RF coupler and balun on the common substrate offers flexible coupling strength and signal directivity, and further improves electrical performance due to short lead lengths, reduces form factor, and increases manufacturing yield. | 09-16-2010 |
| 20110309892 | Semiconductor Device and Method of Integrating Balun and RF Coupler on a Common Substrate - A semiconductor die has an RF coupler and balun integrated on a common substrate. The RF coupler includes first and second conductive traces formed in close proximity. The RF coupler further includes a resistor. The balun includes a primary coil and two secondary coils. A first capacitor is coupled between first and second terminals of the semiconductor die. A second capacitor is coupled between a third terminal of the semiconductor die and a ground terminal. A third capacitor is coupled between a fourth terminal of the semiconductor die and the ground terminal. A fourth capacitor is coupled between the high side and low side of the primary coil. The integration of the RF coupler and balun on the common substrate offers flexible coupling strength and signal directivity, and further improves electrical performance due to short lead lengths, reduces form factor, and increases manufacturing yield. | 12-22-2011 |
| 20130009723 | WIDEBAND, DIFFERENTIAL SIGNAL BALUN FOR REJECTING COMMON MODE ELECTROMAGNETIC FIELDS - Provided are assemblies and processes for efficiently coupling wideband differential signals between balanced and unbalanced circuits. The assemblies include a broadband balun having an unbalanced transmission line portion, a balanced transmission line portion, and a transition region disposed between the unbalanced and balanced transmission line portions. The unbalanced transmission line portion includes at least one ground and a pair of conductive signal traces, each isolated from ground. The balanced portion does not include an analog ground. The transition region effectively terminates the analog ground, while also smoothly transitioning or otherwise shaping transverse electric field distributions between the balanced and unbalanced portions. Beneficially, the balun is free from resonant features that would otherwise limit operating bandwidth, allowing it to operate over a wide bandwidth of 10:1 or greater. Assemblies can include RF chokes with back-to-back baluns, and other elements, such as balanced filters, and also be implemented as integrated circuits. | 01-10-2013 |
| 20120146741 | TRANSFORMER WITH BYPASS CAPACITOR - An electronic device comprises first, second and third inductors connected in series and formed in a metal layer over a semiconductor substrate. The first and second inductors have a mutual inductance with each other. The second and third inductors having a mutual inductance with each other. A first capacitor has a first electrode connected to a first node. The first node is conductively coupled between the first and second inductors. A second capacitor has a second electrode connected to a second node. The second node is conductively coupled between the second and third inductors. | 06-14-2012 |
| 20080231389 | DUAL BAND COUPLED-LINE BALANCED-TO-UNBALANCED BANDPASS FILTER - A dual band balun filter, that includes a first coupled-line section pair provided with a first terminal; a second coupled-line section pair configured to be connected to the first coupled-line section pair, a third coupled-line section pair, and a fourth coupled-line section pair, respectively, and the fourth coupled-line section pair is provided with a second terminal; the third coupled-line section pair is provided with a transmission line and is connected to a fifth coupled-line section pair that is provided with a third terminal; and each of the first to fifth coupled-line section pairs is formed with partial coupled stepped impedance resonators (SIRs). | 09-25-2008 |
| 20080224796 | Balanced-Unbalanced Transformation Device and Method for Manufacturing Balanced-Unbalanced Transformation Device - A balanced-unbalanced transformation device includes a plate-like dielectric substrate having a ground electrode and a plurality of major surface electrodes formed thereon. Two of the major surface electrodes are connected to the ground electrode via short-circuit side surface electrodes so as to form ¼ wavelength resonator transmission lines. A third major surface electrode is disposed between the two major surface electrodes and has either end open so as to form a ½ wavelength resonator transmission line. A balancing characteristic adjustment side surface electrode is provided on a side surface of the dielectric substrate. By adjusting a capacitance formed between the balancing characteristic adjustment side surface electrode and the third major surface electrode, a phase balance between two balanced signals is set to a desired value. | 09-18-2008 |
| 20080224795 | ACTIVE BALUN - An active balun for improving a phase matching characteristic includes a transistor part which has an input terminal receiving an input signal and first and second output terminals which output signals corresponding to the input signal, and a capacitance matching part provided on the side of one of the first and second output terminals which matches capacitances as seen from the first and second output terminals. The capacitance matching part may be composed of a transistor which bleeds a current from the one output terminal. | 09-18-2008 |
