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| Number | Title | Issue Date |
| 8098101 | Method of achieving high selectivity in receiver RF front-ends According to some embodiments, an apparatus may comprise an amplifier, wherein the amplifier comprises: an output stage formed of a positive output terminal providing a positive output voltage and a negative output terminal providing a negative output voltage; a loa... | 01/17/2012 |
| 8093954 | High-frequency input circuit A high-frequency input circuit. The input circuit includes an input node, a bond pad, and a signal conversion resistor coupled in series between the input node and the bond pad to convert substantially all of a signal voltage at the input node to a signal current at... | 01/10/2012 |
| 8081032 | Broadband LNA with filter A low noise amplifier (LNA) includes an LNA input that receives a signal from an antenna. The LNA also includes an internal amplifier with an input that is coupled to the LNA input, as well as an internal filter with an input coupled to the output of the internal am... | 12/20/2011 |
| 8049566 | Feedback LNA with resistor A receiver includes a feedback low noise amplifier (LNA). The feedback LNA has an LNA gain and includes an LNA input configured to receive a signal from an antenna and an LNA output configured to output an amplified voltage signal. The receiver also includes a resis... | 11/01/2011 |
| 7961051 | Enhanced low noise amplifier This amplifier (10) for radio frequency signals comprises a circuit adapted to amplify the signals within a first range of frequency (19) and is characterized in that said circuit is also adapted to simultaneously attenuate the signals within a second ... | 06/14/2011 |
| 7924098 | High frequency amplifier circuit and mobile communication terminal using the same A first FET is inserted in a series position between a signal input terminal and a signal output terminal, while second and third FETs are inserted in a shunt position respectively between the signal input terminal and a ground terminal and between the signal output... | 04/12/2011 |
| 7911277 | Adaptively tuned RF power amplifier An adaptively tuned RF power amplifier includes at least one power amplifier stage that has one or more active elements. A tunable output network is coupled to the power amplifier stage and includes one or more adjustable reactive elements. A mismatch detector detec... | 03/22/2011 |
| 7868700 | Method and apparatus for reducing current consumption of MIMO systems Apparatus and method for reducing the current consumption and increasing the efficiency of a MIMO system, consisting of one or more RF power amplifiers (PAs) and that is required to provide a desired total output power level. An individual output power level which i... | 01/11/2011 |
| 7834704 | Low-noise amplifier circuit and receiving system In a broadband low-noise amplifier circuit to be used in a multichannel reception system, a capacitance of a variable capacitor (9) is controlled by a resonance frequency control circuit (4) so that a resonance frequency of a load unit (2) compr... | 11/16/2010 |
| 7764125 | Reconfigurable tunable RF power amplifier A multi-band, multi-standard programmable power amplifier having tunable impedance matching input and output networks and programmable device characteristics. The impedance of either or both of the impedance matching input and output networks is tunable responsive t... | 07/27/2010 |
| 7764124 | Broadband low noise amplifier Aspects provide for the broadband amplification of RF signals. Other aspects provide for the conversion of single ended input to differential output. Various aspects provide for tuning the response to a particular frequency band. Other aspects provide for various tr... | 07/27/2010 |
| 7741916 | Reconfigurable circuit to compensate for a low noise amplification input matching variation and a method for its configuration A method for changing an effective capacitance of an amplifier circuit having a match transistor and a coupled cascode transistor includes changing an on-state of at least one of a plurality of sub-transistors of the match transistor. The method further includes cha... | 06/22/2010 |
| 7692494 | Low strain variable frequency amplifier A variable frequency amplifier suffering less deterioration of strain characteristic and capable of operating at plural frequencies is disclosed. In one aspect, a changeable amplifier comprises an amplifying element, a changeable matching circuit disposed at an inpu... | 04/06/2010 |
| 7692495 | Tunable RF bandpass transconductance amplifier Aspects of the disclosure can provide a bandpass transconductance amplifier that can include a minuend transconductance amplifier that converts a voltage signal to a first current and a subtrahend transconductance amplifier that converts the voltage signal to a seco... | 04/06/2010 |
| 7629852 | Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies Circuits and methods are provided for building integrated transformer-coupled amplifiers with on-chip transformers that are designed to resonate or otherwise tune parasitic capacitances to achieve frequency tuning of amplifiers at millimeter wave operating frequenci... | 12/08/2009 |
| 7592873 | Low noise amplifier For a first transistor, a source thereof is coupled to an input terminal and a drain thereof is coupled to an output terminal. A first variable impedance circuit is arranged between a gate of the first transistor and ground, and the impedance thereof is changed acco... | 09/22/2009 |
| 7586376 | Pre-power amplifier of load, switch array, and impedance compensation A novel and useful load compensation circuit and associated pre-power amplifier constructed therefrom. The load compensation circuit functions to maintain a nearly constant output impedance of the pre-power amplifier by use of a switch matrix comprising a plurality ... | 09/08/2009 |
| 7567129 | Monolithic flexible power amplifier using integrated tunable matching networks A flexible power amplifier can be adapted during operation for use in connection with two or more different wireless standards. In at least one embodiment, adaptations to power transistor size, RF bias current, and matching are made when a corresponding multi-standa... | 07/28/2009 |
| 7554411 | Wireless transmitter having multiple programmable gain amplifiers (PGAs) with tuned impedance to provide substantially linear response A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second programmable gain amplifiers (PGAs). The first PGA is tuned to have ... | 06/30/2009 |
| 7495515 | Low-noise amplifier Methods and corresponding systems in a low noise amplifier include selecting a selected sub-band for amplifying, wherein the selected sub-band is one of a plurality of sub-bands, wherein each sub-band is a portion of a frequency band, and wherein each sub-band has a... | 02/24/2009 |
| 7459981 | Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies Circuits and methods are provided for building integrated transformer-coupled amplifiers with on-chip transformers that are designed to resonate or otherwise tune parasitic capacitances to achieve frequency tuning of amplifiers at millimeter wave operating frequenci... | 12/02/2008 |
| 7439811 | Broadband low noise amplifier and RF signal amplification method of the same A broadband low noise amplifier and amplification method is provided. The broadband low noise amplifier includes an input terminal into which a radio frequency (RF) signal received by an antenna is input, an output terminal from which an amplified RF signal is outpu... | 10/21/2008 |
| 7432767 | Tunable low noise amplifier Tunable low noise amplifier using an RF current feed back loop (L) coupled between input (IM) and output (OM) means and including first (CAI) and second (CA2) serially coupled first order lowpass RF current amplifiers as well RF current inverter means (INV). ... | 10/07/2008 |
| 7432763 | Gain boosting for tuned differential LC circuits A gain boost circuit and methodology are described for providing improved gain boosting with tuned amplifier circuits, such as differential low noise amplifier circuits having output resonant tank circuits. By selectively controlling the current source for a negativ... | 10/07/2008 |
| 7417508 | Multiple RF path amplifiers An amplifier is disclosed for providing processing of a variable RF signal, the amplifier comprising a first parallel gain stage and a plurality of second parallel gain stages electrically disposed between an input fixed impedance matching circuit and an output fixe... | 08/26/2008 |
| 7411459 | Current mode transconductor tuning device A transconductor tuning device tuning a transconductance using a current. The transconductor tuning device includes a tuning section that applies a tuning current and a reference voltage to a transconductor converting an input voltage signal into a current signal an... | 08/12/2008 |
| 7412219 | High-frequency amplifier having simple circuit structure and television tuner using high-frequency amplifier A high-frequency amplifier includes first and second amplifying stages disposed in parallel for amplifying VHF/UHF television signals. The first amplifying stage includes a first FET and a second FET of a grounded-gate type connected in series between a common input... | 08/12/2008 |
| 7405621 | Apparatus for amplifying differential signal An apparatus for amplifying differential signals is provided. The apparatus comprises a differential amplifier, a first impedance component, a second impedance component, a voltage source and a high-pass filter. The differential amplifier receives an input different... | 07/29/2008 |
| 7400203 | Circuit with Q-enhancement cell having feedback loop According to an example embodiment, an amplitude feedback loop may include an RF amplifier, a detector, a comparator, and a Q-enhancement cell. In an example embodiment, the RF amplifier has an output signal, and the detector has an input coupled to the output signa... | 07/15/2008 |
| 7394310 | System and method for programmable switching characteristics of an analog switch in a transconductance amplifier Provided are a method and system for controlling impedance in a transconductance amplifier. A system includes a first transconductance amplifier and a second transconductance amplifier configured to control electrical characteristics associated with the first transc... | 07/01/2008 |
| 7391268 | Power amplifying device comprising a stabilizing circuit A power amplifying device includes a stabilizing circuit between an input terminal and an amplifier. The stabilizing circuit has a first line, a second line, and a third line. The first line is connected to the ground. The length of the first line is equal to or lon... | 06/24/2008 |
| 7382197 | Adaptive tuning circuit to maximize output signal amplitude for an amplifier An adaptive tuning circuit to maximize the output signal amplitude of a band-pass amplifier, comprising a control circuit to tune the peak frequency of the amplifier by monitoring the change in the output signal amplitude over two successive time sampling intervals.... | 06/03/2008 |
| 7365606 | Receiving amplifier, in particular for television receivers, and use of the receiving amplifier A receiving amplifier includes a semiconductor body with a first node, a second node and an amplifier circuit. The amplifier includes at least one field-effect transistor, a first input, and a second input. A capacitive element is arranged between the inputs of the ... | 04/29/2008 |
| 7356321 | Radio frequency tuner A radio frequency tuner is provided for selecting channels from a cable distribution network or other reception system. The tuner has one or more stages whose performance, such as signal to noise plus intermodulation, and gain are functions of the stage power consum... | 04/08/2008 |
| 7339437 | Ultra-wideband constant gain CMOS amplifier Circuitry and methods for improved amplifiers with large bandwidth and constant gain are provided. The combination of a synthetic inductive drain load and a bridged-T matching network provide amplifiers that can drive a substantial capacitive load with the above men... | 03/04/2008 |
| 7332970 | Integrated amplifier, electronic communication unit with integrated amplifier and method for operating the electronic communication unit with an integrated amplifier An integrated amplifier has a resonant circuit with a tuneable center frequency, in which the resonant circuit has at least one coil and at least one varactor for varying a resonant frequency of the resonant circuit. ... | 02/19/2008 |
| 7325180 | System and method to test integrated circuits on a wafer A system to test integrated circuits on a wafer may include a transceiver formed on the wafer. The system may also include an antenna system couplable to the transceiver. The transceiver may be formed in one of a scribe line on the wafer, a chip on the wafer or on a... | 01/29/2008 |
| 7323939 | Low noise amplifier for wideband tunable matching Provided is a low noise amplifier with a common source and a source degeneration, which has linearity, power gain, noise factor, and lossless input matching. The low noise amplifier includes: a first inductor having one terminal connected to an input terminal receiv... | 01/29/2008 |
| 7321273 | Off-chip LC circuit for lowest ground and VDD impedance for power amplifier Off-chip LC circuit for lowest ground and VDD impedance for power amplifier. A novel approach is made by which a chip to PCB (Printer Circuit Board) interface may be made such that the ground and VDD potential levels are effectively brought onto the die of the chip ... | 01/22/2008 |
| 7321263 | Class E power amplifier circuit and associated transmitter circuits A class E power amplifier circuit comprising an active device, a DC blocking element and an oscillating element, wherein the oscillating element is driven by a voltage signal. ... | 01/22/2008 |
