Class / Patent application number | Description | Number of patent applications / Date published |
330301000 | Including balanced to unbalanced circuits and vice versa | 21 |
20080218272 | WIDEBAND DIGITAL SINGLE-TO-DIFFERENTIAL CONVERTER AND METHOD OF FORMING SAME - A method and apparatus for single-to-differential conversion includes a single-to-differential stage ( | 09-11-2008 |
20080252381 | Transformer Circuit - A BALUN circuit ( | 10-16-2008 |
20080272849 | Active Baluns - Example embodiments of the invention may provide for active baluns. An example active balun may include a resonator that may convert a single-ended input signal to at least two differential input signals, and a differential switching block that includes first and second transistors that each receive a respective one of the at least two differential input signals from the resonator, where the first and second transistors may be cross-coupled to each other to provide a first differential output signal and a second differential output signal. An example active balun may further include one or more loads connected to the first and second differential output signals, and one or more stacked inverters that may provide a first output port and a second output port, where the first output port may be responsive to the first differential output signal and the second output port may be responsive to the second differential output signal. | 11-06-2008 |
20090051440 | ACTIVE BALUN CIRCUIT - There is provided an active balun circuit including: a load circuit unit including a first and a second load; a differential amplifying unit including a first amplifying unit connected to the first load, and a second amplifying unit connected to the second load and forming a differential amplifying unit together with the first amplifying unit, the differential amplifying unit differentially amplifying an input signal, and outputting first and second output signals out-of-phase with each other through first and second output terminals, respectively; a current source connected between a ground and a common connection node of the first and second amplifying units, and maintaining a constant amount of current flowing through the differential amplifying unit; and a compensation amplifying unit amplifying the input signal supplied through the input terminal, transmitting the amplified input signal to the second amplifying unit, and rejecting common mode noise of the differential amplifying unit. | 02-26-2009 |
20090096532 | DIFFERENTIAL AMPLIFIER WITH SINGLE ENDED OUTPUT - Various embodiments for converting a differential signal to a single ended signal are disclosed. The embodiments comprise a transistor pair for receiving a differential signal; and a tank circuit coupled to the transistor pair. The tank circuit includes a first inductor and one or more capacitors. The embodiments also include a second inductor magnetically coupled to the first inductor to form a balanced/unbalanced inductor (BIMI) arrangement. The BIMI arrangement directly converts the differential signal to a single ended signal. | 04-16-2009 |
20090108943 | LOW NOISE AMPLIFIER - A low-noise amplifier circuit to convert a single-ended input into a dual-ended output includes an input transconductance stage circuit, including a first MOS transistor coupled in parallel with a second MOS transistor; a current buffer circuit, including a third MOS transistor coupled in parallel with a fourth MOS transistor; each of the first, second, third, and fourth transistors having a body, gate, source, and drain; the input transconductance stage circuit and the current buffer circuit being cascode coupled, forming a cascode amplifier configuration; the single-ended input being at the source of one of the first and second transistors in the input transconductance stage circuit; the dual-ended output being a differential output across the drain of the third transistor and the drain of the fourth transistor; the first and second transistors of the input transconductance stage circuit being cross-coupled, wherein the body of the first transistor is coupled to the source of the second transistor, and the body of the second transistor is coupled to the source of the first transistor; and the third and fourth transistors of the current buffer circuit being cross-coupled, wherein a first capacitance is coupled between the gate of the third transistor and the source of the fourth transistor, and a second capacitance is coupled between the gate of the fourth transistor and the source of the third transistor. | 04-30-2009 |
20090160559 | INTEGRATED CIRCUIT INCLUDING IMPEDANCE TO PROVIDE SYMMETRICAL DIFFERENTIAL SIGNALS - One embodiment provides an integrated circuit including an input stage and an impedance. The input stage is configured to receive a single-ended input signal and provide a differential output signal. The impedance is configured to receive the single-ended input signal and provide compensation to the input stage to provide symmetrical differential signals in the differential output signal. | 06-25-2009 |
20090212872 | Wideband Active Balun Using Darlington Pair - An active balun with Darlington pairs obtains a wideband operation. With differential output signals, a size of the active balun is minimized. The present invention can be applied to a transceiver. With a wideband amplitude match and 180° out of phase, the performance of the transceiver is improved by the present invention for a few wide applications. | 08-27-2009 |
20090243730 | CONVERTING CIRCUIT FOR CONVERTING DIFFERENTIAL SIGNAL TO SINGLE-ENDED SIGNAL - A converting circuit for converting differential signals to a single-ended signal. The converting circuit comprises a cascode amplifier comprising a first transistor and a second transistor, wherein the first transistor comprises a control terminal, a first terminal, and a second terminal, the control terminal to which one of the differential signals is input, the control terminal being electrically-grounded; and, the second transistor comprises a first terminal and a second terminal, the first terminal of the second transistor being connected to the first terminal, the second terminal of the second transistor from which output signal is outputted, a capacitor for adjusting the phase, the capacitor being connected to the second terminal; and a current source being connected to the second terminal. | 10-01-2009 |
20090251221 | Radio Frequency Front-End Circuit - A radio frequency (RF) front end circuit includes a transformer coupled to a switch. The transformer converts a balanced transmit signal to an unbalanced transmit signal and converts an unbalanced receive signal to a balanced receive signal. The switch is configured to operate in first and second states. In the first state, the switch receives the unbalanced transmit signal from the transformer and transfers the unbalanced transmit signal to an amplifier and receives an amplified transmit signal from the amplifier and transfers the amplified transmit signal to a band pass filter. In the second state, the switch receives a filtered receive signal from the band pass filter and transfers the filtered receive signal to the transformer. | 10-08-2009 |
20090251222 | Linear High Powered Integrated Circuit Amplifier - A linear high powered integrated circuit amplifier includes a plurality of power amplifiers, balanced integrated circuit coupling, and a combining circuit. The balanced integrated circuit coupling couples a signal to the plurality of power amplifiers to the up-conversion module such that the power amplifiers amplify the signal to produce a plurality of amplified radio frequency (RF) signals. The combining circuit is operably coupled to combine the plurality of amplified RF signals to produce a high-powered amplified signal. | 10-08-2009 |
20090289721 | CIRCUITS, PROCESSES, DEVICES AND SYSTEMS FOR FULL INTEGRATION OF RF FRONT END MODULE INCLUDING RF POWER AMPLIFIER - An electronic circuit comprising a transistor-based RF (radio frequency) power amplifier ( | 11-26-2009 |
20090315625 | METHOD AND SYSTEM FOR PROCESSING SIGNALS VIA AN INTEGRATED LOW NOISE AMPLIFIER HAVING CONFIGURABLE INPUT SIGNALING MODE - Aspects of a method and system for processing signals via an integrated low noise amplifier having a configurable input signaling mode are provided. For an unbalanced input signal, a first input terminal of the LNA may be communicatively coupled to ground via an inductance and a bias point of the LNA may be communicatively coupled to a first bias voltage. For a balanced input signal, the first input terminal of the LNA may be communicatively coupled to the balanced signal and the bias point may be communicatively coupled to a second bias voltage. The LNA may comprise a center-tapped differential inductor which may be coupled to an output terminal of the LNA and may enable the LNA to output differential signals regardless of the input signaling mode. In various embodiments of the invention, the LNA may be utilized to amplify GNSS signals such as GPS signals. | 12-24-2009 |
20100013562 | CIRCUIT WITH SINGLE-ENDED INPUT AND DIFFERENTIAL OUTPUT - An inverting stage is coupled between a single-ended in-put node and a first differential output node, and a non-inverting stage is coupled between the single-ended input node and a second differential output node. The inverting stage includes at least one transistor with a first current terminal, a second current terminal, and a control terminal, the first current terminal being coupled to the first differential output node and the control terminal being coupled to a single-ended input node. The non-inverting stage includes at least one transistor with a first current terminal, a second current terminal, and a control terminal, the first current terminal being coupled to the second differential output node, and the second terminal being coupled to the single-ended input node. A bias current of the inverting stage is larger than a bias current of the non-inverting stage. | 01-21-2010 |
20100033253 | TECHNIQUES FOR IMPROVING BALUN LOADED-Q - Techniques for improving the quality factor (“Q”) of a balun in the presence of loading stages are disclosed. In an exemplary embodiment, the ground node of a balun secondary (single-ended) element is connected to a source node of an amplifier stage via a common ground node. The connection may be made physically short to minimize any parasitic elements. In another exemplary embodiment, the common ground node may be coupled to an off-chip ground voltage via a peaking inductor. The peaking inductor may be implemented on-chip, e.g., as a spiral inductor, or off-chip e.g., using bondwires. | 02-11-2010 |
20100182093 | SINGLE-ENDED TO DIFFERENTIAL CONVERTING APPARATUS AND RF RECEIVING APPARATUS - A single-ended to differential converting apparatus includes a first amplifier configured to output a first voltage signal corresponding to a single phase input signal; and a second amplifier configured to output a second voltage signal corresponding to the first voltage signal, where a first load of the first amplifier, an input transistor of the second amplifier, and a second load of the second amplifier have identical mutual conductance. | 07-22-2010 |
20110037522 | ACTIVE BALUN WITH STACKED STRUCTURE - An active balun with a stacked structure includes: a first amplification unit including a first transistor having a first terminal connected with a first input terminal, a second terminal connected with a power voltage terminal, and a third terminal connected with an output terminal; a second amplification unit including a second transistor having a first terminal connected with a second input terminal, a second terminal connected with the output terminal, and a third terminal connected with a ground; and a capacitance matching unit connected between the first terminal and the third terminal of the first transistor and having a pre-set matching capacitance. | 02-17-2011 |
20120154056 | METHOD AND APPARATUS FOR CANCELING BALUN AMPLIFIER NOISE - The noise figure of a low noise amplifier (LNA) is reduced without sacrificing performance such as gain, IIP3, and wideband impedance matching. Embodiments include configuring a control module of the LNA to sum and scale an output from a current-sensing branch of the LNA and an output from a voltage sensing branch of the LNA into one or more summed and scaled outputs. The control module also feeds the one or more summed and scaled outputs back to at least one of the outputs of the branches of the LNA. | 06-21-2012 |
20140266469 | Current Re-Using Wideband Low-Noise Active Balun - Some aspects of the present disclosure relate to a low-noise amplifier (LNA) having a balun configuration. The LNA includes a DC current path coupling a first DC supply node to a second DC supply node. First and second output nodes and first and second input nodes are spaced apart along a length of the DC current path. A single-ended radio frequency (RF) input terminal is configured to deliver a single-ended RF signal to the first and second input nodes. A differential RF output terminal is made up of the first and second output nodes. The first and second output nodes are configured to cooperatively establish a differential output signal based on the single-ended RF signal. Other devices and methods are also disclosed. | 09-18-2014 |
20150035609 | METHOD AND APPARATUS FOR CONVERTING SINGLE-ENDED SIGNALS INTO DIFFERENTIAL SIGNALS - An electronic apparatus comprises a first stage that functions as a single-ended to differential converter for signals in a low frequency range and a second stage that is electrically connected to the first stage and functions as a single-ended to differential converter for signals in a high frequency range. | 02-05-2015 |
20150109059 | Distributed Quality Factor Adjustment - A system includes a differential circuit, multiple cross-coupled transconductance circuits. In some implementations, the differential circuit may include an inductor coil in a balun or transformer. The cross-coupled transconductance circuits may act to reduce the internal resistance of the differential circuit to increase the quality factor of the differential circuit. The cross-coupled transconductance circuit may be connected at differential points along the differential circuit and be engaged and disengaged to linearize the quality factor of the differential circuit. | 04-23-2015 |