Class / Patent application number | Description | Number of patent applications / Date published |
455338000 | Coupling or decoupling between stages | 18 |
20080280585 | RF receiver front-end and applications thereof - A radio frequency (RF) receiver front-end includes an low noise amplifier (LNA) module, a current domain mixing module, and a buffer module. The LNA module is coupled to amplify an inbound RF signal to produce an amplified inbound RF current signal. The current domain mixing module is coupled to mix the amplified inbound RF current signal with a local oscillation to produce a mixed current signal. The buffer module is coupled to provide a baseband or near baseband voltage signal from the mixed current signal. | 11-13-2008 |
20100317313 | DUAL-BAND COUPLER UNIT AND DUAL-BAND COUPLER THEREOF AND RECEIVER THEREOF - A dual-band coupler unit is provided. The dual-band coupler unit includes a first coupled line, a second coupled line, a short transmission line, a first transmission line, and a second transmission line. The first coupled line and the second coupled line are substantially in parallel with each other, and are substantially of the same length. One end of the short transmission line is connected to one end of the first coupled line, and the other end of the short transmission line is connected to one end of the second coupled line. One end of the first transmission line is connected to the other end of the first coupled line, and one end of the second transmission line is connected to the other end of the second coupled line. | 12-16-2010 |
20140171010 | Semiconductor Devices with Switchable Ground-Body Connection - Semiconductor devices with switchable connection between body and a ground node are presented. Methods for operating and fabricating such semiconductor devices are also presented. | 06-19-2014 |
20190149131 | MULTIPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION APPARATUS | 05-16-2019 |
455339000 | Band pass filter | 12 |
20080287089 | INPUT FILTER FOR IMAGE FREQUENCY SUPPRESSION - An input filter is provided for a superheterodyne receiver for image frequency suppression and a method for operating a superheterodyne receiver. The input filter for a superheterodyne receiver includes a first filter circuit with bandpass characteristics and a center frequency that can be preset as a function of a desired receive frequency, the circuit having a varactor diode and a first filter inductor that are connected in parallel and form a parallel-resonant circuit, wherein the center frequency can be preset by application of a control voltage to the varactor diode, and a second filter circuit with band stop characteristics that includes the varactor diode and a second filter inductor, these being connected in series and forming a series-resonant circuit, and that has a maximum attenuation in the vicinity of an image frequency belonging to the desired receive frequency. The input filter may be used in, for example, DAB receivers. | 11-20-2008 |
20090197561 | HIGH LINEARITY TUNABLE BANDPASS FILTER - A tunable bandpass filter ( | 08-06-2009 |
20090221260 | Blocker Performance in a Radio Receiver - A multiple stage band pass filter of a Radio Frequency (RF) Integrated Circuit is provided with a low pass mixer output filter coupled to receive a down sampled analog information signal, a buffer coupled to an output of the low pass mixer output filter, a low pass buffer output filter coupled to an output of the buffer and a plurality of band pass filters coupled to an output of the low pass buffer output filter. | 09-03-2009 |
20090275305 | HIGH LINEARITY TUNABLE BANDPASS FILTER - A tunable bandpass filter ( | 11-05-2009 |
20100022215 | BASEBAND FILTERS FOR USE IN WIRELESS COMMUNICATION DEVICES - An embodiment of a baseband filter in a transmitter subsystem of a wireless device comprises an operational amplifier (op-amp), a pole circuit, a feedback capacitor, and an active device. The op-amp is adapted to produce an amplified signal that includes noise gain produced by the op-amp. The pole circuit is electrically coupled with an output terminal of the op-amp, and is adapted to receive the amplified signal and to attenuate the noise gain to produce a filtered, amplified signal. The feedback capacitor is electrically coupled between the first pole circuit and an input terminal of the op-amp, and is adapted to compensate for a phase shift produced by the pole circuit. The active device is electrically coupled with the pole circuit, and is adapted to amplify the filtered, amplified signal and to produce a baseband filtered output signal. | 01-28-2010 |
20100029241 | Rf filter/resonator with protruding tabs - An RF signal filter/resonator includes a core of dielectric material having top, bottom, and side surfaces. At least one through-hole extends through the core. In one embodiment, the core defines first and second alignment/coupling elements formed on the core for aligning and coupling the filter on and to another coupling element or structure such as a printed circuit board. In one embodiment, the alignment/coupling elements are first and second spaced-apart tabs of different configuration which protrude outwardly from one of the side surfaces, are adapted to be fitted in complementarily configured slots in the printed circuit board, and define respective RF signal input/output pads. In another embodiment, the tabs protrude outwardly from the top surface of the core. | 02-04-2010 |
20100041362 | Hairpin Band Pass Filter and Related Frequency Down Converter - A band pass filter includes a first micro-strip port for receiving a radio-frequency signal, a second micro-strip port for outputting a filtered radio-frequency signal and comprising at least one resonating cavity formed for enhancing rejecting effect of image frequency corresponding to the filtered radio-frequency signal, and a plurality of resonators arranged between the first micro-strip port and the second micro-strip port for performing band pass filtering on the radio-frequency signal to generate the filtered radio-frequency signal. | 02-18-2010 |
20100167684 | QUADRATURE SIGNAL GENERATION IN RADIO-FREQUENCY APPARATUS AND ASSOCIATED METHODS - A radio-frequency (RF) apparatus, which may reside in a receiver or transceiver, includes receive-path circuitry. The receive-path circuitry includes a poly-phase filter and a harmonic filter. The poly-phase filter accepts an input signal and generates two output signals. One output signal of the poly-phase filter constitutes an in-phase (I) signal. The other output signal of the poly-phase filter constitutes a quadrature (Q) signal. The a harmonic filter couples to the poly-phase filter. The harmonic filter accepts as input signals the in-phase and quadrature output signals of the poly-phase filter. | 07-01-2010 |
20100178894 | HIGH-FREQUENCY RECEIVER WITH MULTIPLE-CHANNEL DIGITAL PROCESSING - In the receive subsystem, the analogue-to-digital converter ( | 07-15-2010 |
20100279644 | MEMS BASED MULTIBAND RECEIVER ARCHITECTURE - A receiving apparatus is provided. The receiving apparatus comprises a chip carrier including at least one stack of layers, wherein at least one layer in the stack supports radio frequency transmission lines, tunable bandpass filters, wherein each bandpass filter is integrated within an associated radio frequency transmission line, and at least one integrated micro-chip on the chip carrier. The at least one integrated micro-chip couples selected bandwidth regions of received broadband radio frequency signals to the tunable bandpass filters via the associated radio frequency transmission line. The at least one integrated micro-chip outputs each filtered selected bandwidth region to an associated one of a plurality of intermediate frequency modules. | 11-04-2010 |
20100330949 | BPS RECEIVER - The present invention receives simultaneously RF signal of different frequency band and processes the RF signal received, at this time a BPS receiver minimizes aliasing generated by RF signal. The present invention comprises a sampling process unit which samples a signal summing a first RF signal and a second RF signal of different frequency bands with time gap, a quantization process unit which generates a first stream signal and a second stream signal, a digital signal down-converted through respective time information in the signal summing the first RF signal and the second RF signal and a signal process unit which performs FIR filtering with reference to phase shift for a respect frequency band of the first stream signal and the second stream signal, separates the first RF signal and the second RF signal based on a result of the performance. | 12-30-2010 |
20110237216 | BANDPASS FILTER, AND WIRELESS COMMUNICATION MODULE AND WIRELESS COMMUNICATION DEVICE USING THE BANDPASS FILTER - [Object] An object is to provide a bandpass filter that can be used for a wide frequency band and has a large degree of freedom in designing a passband, and a wireless communication module and a wireless communication device that use the bandpass filter. | 09-29-2011 |
455340000 | Variably tunable or adjustable | 2 |
20100311383 | Ultra-wideband tunable filters based on multi-resolution band-selection - Devices and methods for tunable RF filtering. Multiple bimodal filter stages are used within a filter device to provide for tunable frequency response of the filter device. The use of M sequential bimodal filter stages, each having different frequency resolutions, may allow for 2 | 12-09-2010 |
20150038101 | WEAKLY COUPLED TUNABLE RF RECEIVER ARCHITECTURE - RF communications circuitry, which includes a first tunable RF filter and a first RF low noise amplifier (LNA) is disclosed. The first tunable RF filter includes a pair of weakly coupled resonators, and receives and filters a first upstream RF signal to provide a first filtered RF signal. The first RF LNA is coupled to the first tunable RF filter, and receives and amplifies an RF input signal to provide an RF output signal. | 02-05-2015 |