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| Application No. | Application Title | Issue Date |
| 20120105157 | VARIABLE GAIN AMPLIFIER A variable gain amplifier includes a source-grounded transistor, to a gate of which an input signal is supplied; a plurality of first cascode transistors, sources of which are connected to a drain of the source-grounded transistor; a second cascode transistor, a source ... | 05/03/2012 |
| 20120032743 | LOW-NOISE AMPLIFIER WITH GAIN ENHANCEMENT A low-noise amplifier (“LNA”) includes a first cascode gain stage including a first complementary metal oxide semiconductor (“CMOS”) transistor configured to receive a radio frequency (“RF”) input signal and a second CMOS transistor coupled to an output node... | 02/09/2012 |
| 20120032742 | CMOS MILLIMETER-WAVE VARIABLE-GAIN LOW-NOISE AMPLIFIER A low-noise amplifier (LNA) includes a first cascode gain stage coupled to an input node for increasing an amplitude of an RF input signal. A first variable gain network is coupled to the first cascode gain stage and includes a first inductor for boosting a gain of the ... | 02/09/2012 |
| 20110300898 | HIGH LINEARITY CMOS RF SWITCH PASSING LARGE SIGNAL AND QUIESCENT POWER AMPLIFIER CURRENT Disclosed are high linearity CMOS-based devices capable of passing large signal and quiescent power amplifier current for switching radio frequency (RF) signals, and methods for biasing such devices. In certain RF devices such as mobile phones, providing different ampli... | 12/08/2011 |
| 20110300899 | CMOS RF SWITCH DEVICE AND METHOD FOR BIASING THE SAME Disclosed are CMOS-based devices for switching radio frequency (RF) signals and methods for biasing such devices. In certain RF devices such as mobile phones, providing different amplification modes can yield performance advantages. For example, a capability to transmit... | 12/08/2011 |
| 20110193634 | AMPLIFIER WITH REDUCED OUTPUT TRANSIENTS AND METHOD THEREFOR An amplifier (210) includes an input stage (310, 320) and an output stage (330). The input stage (310, 320) has an input for receiving an input signal, and an output. The output stage (330) has an input coupled to the output of the inp... | 08/11/2011 |
| 20110128078 | System and Method of Prebias for Rapid Power Amplifier Response Correction A system and method are provided for reducing dynamic EVM of an integrated circuit power amplifier (PA) used for RF communication. In a multistage PA, the largest amplification stage is biased with a high amplitude current pulse upon receipt of a Tx enable, before recei... | 06/02/2011 |
| 20110102088 | LOW NOISE AMPLIFIER CIRCUIT Low noise amplifier circuit. The low noise amplifier circuit includes an amplifier that amplifies an input to provide an output. The amplifier is coupled to an input terminal. The circuit also includes a device in a cascode connection with the amplifier. The circuit fur... | 05/05/2011 |
| 20110050347 | Method and System for Amplifier Control A method is disclosed wherein a power level indicating a level of transmission power from an amplifier is provided. An indication of at least one of channel, channel bandwidth, OOB spectral requirements, spectral mask requirements, EVM, modulation rate, and modulation t... | 03/03/2011 |
| 20110018637 | RADIOFREQUENCY SIGNAL POWER AMPLIFICATION METHOD AND DEVICE A radiofrequency signal power amplification circuit may include a signal input for receiving the radiofrequency signal, an amplification stage coupled to the signal input and having at least one power transistor, a biasing stage for delivering a bias voltage to the ampl... | 01/27/2011 |
| 20100315166 | Variable Gain Circuit There is provided a variable gain circuit system which is inductorless and capable of achieving a high gain and a wide band by elements for achieving variable gain to prevent decreasing a gain or deteriorating the band. The variable gain circuit includes: transistors; a... | 12/16/2010 |
| 20100156539 | POWER AMPLIFIER SYSTEM WITH POWER CONTROL FUNCTION A power amplifier system with power control function provides accurate and efficient power control by controlling a bias voltage and a bias current of the power amplifier at the same time. A power amplifier system with power control function according to an aspect of th... | 06/24/2010 |
| 20100109778 | BROADBAND RF LINEAR AMPLIFIER A broad-band linear amplifier circuit includes a driver amplifier to produce a first amplified radio frequency (RF) signal in a first single RF band in response to a first input RF signal and to produce a second amplified RF signal in a second single RF band in response... | 05/06/2010 |
| 20100102887 | ELECTRONIC COMPONENT FOR HIGH FREQUENCY POWER AMPLIFICATION An electronic component for high frequency power amplification realizes an improvement in switching spectrum characteristics. The gain of an amplifying NMOS transistor is controlled by a bias voltage on which a bias control voltage is reflected. Further, a threshold vol... | 04/29/2010 |
| 20100085119 | Generating A Process And Temperature Tracking Bias Voltage In one embodiment, a method includes generating a current that is proportional to a mobility and an oxide capacitance of a tracking device and independent of a threshold voltage variation of the tracking device, generating a voltage from the current, and providing the v... | 04/08/2010 |
| 20100052789 | Power Amplifier With Output Power Control This disclosure relates systems and methods for a power amplifier with output power control. The power amplifier can include multiple stages of amplification. An RF signal is fed to the power amplifier with output control that amplifies the power of the RF signal to mee... | 03/04/2010 |
| 20090309661 | Systems and Methods for Switching Mode Power Amplifier Control Embodiments of the invention may provide for enhancement systems and methods for a power amplifier output control system. In an example embodiment, driver amplifier control may be provided in conjunction with power amplifier control to improve the power efficiency and/o... | 12/17/2009 |
| 20090295485 | DYNAMICALLY BIASING CLASS AB POWER AMPLIFIERS OVER A RANGE OF OUTPUT POWER LEVELS A method and apparatus for dynamically biasing a class AB RF power amplifier (PA) over a range of output power levels. A memory 112 holds a table that maps a required output power to the PA from a set of bias point parameters that provide a substantially constant... | 12/03/2009 |
| 20090289719 | Preserving Linearity of a RF Power Amplifier A method and circuit for preserving linearity of a RF power amplifier, the power amplifier including a RF power output unit having a characteristic drive level and fed by a supply voltage, comprising measuring the output voltage of the RF power output unit; comparing th... | 11/26/2009 |
| 20090243727 | Compensating for non-linear capacitance effects in a power amplifier In one implementation, a power amplifier may include a gain device to receive an input signal and to output an amplified signal, and a compensation device coupled to the gain device to compensate for a change in a capacitance of the gain device occurring due to a change... | 10/01/2009 |
| 20090206933 | DUAL BIAS CONTROL CIRCUIT The present invention relates to a bias control circuit and method for supplying a bias signal to at least one stage of an amplifier circuit, wherein a dual bias control is provided by generating a bias current and additionally using this bias current to derive a contro... | 08/20/2009 |
| 20090102559 | MONOTONIC VARIABLE GAIN AMPLIFIER AND AN AUTOMATIC GAIN CONTROL CIRCUIT A monotonic variable gain amplifier which can be controlled to achieve a desired gain. The amplifier has: —at least two amplifier stages (41-45) connected in parallel between input and output terminals, each amplifier stage including: * a fixed gain tran... | 04/23/2009 |
| 20090091392 | BIAS CIRCUIT FOR THE WIRELESS TRANSCEIVER A bias circuit for the wireless transceiver is disclosed, which can be used for modulating the gain of the amplifier. The bias circuit comprises a first stage bias unit for receiving a constant current, a control voltage, and a first reference voltage and outputting a f... | 04/09/2009 |
| 20090091390 | Programmable-gain amplifier systems to facilitate low-noise, low-distortion volume control Programmable-gain amplifier systems are provided that are particularly suited for reducing degrading audio effects such as zipper noise. In one embodiment, these systems switchably couple an electronic potentiometer between an amplifier's inverting input terminal and in... | 04/09/2009 |
| 20090072906 | HIGH FREQUENCY POWER AMPLIFIER CIRCUIT AND ELECTRONIC COMPONENT FOR HIGH FREQUENCY POWER AMPLIFIER In a high frequency power amplifier circuit that supplies a bias to an amplifying FET by a current mirror method, scattering of a threshold voltage Vth due to the scattering of the channel impurity concentration of the FET, and a shift of a bias point caused by the scat... | 03/19/2009 |
| 20090051437 | POWER AMPLIFIER An emitter follower circuit applies to an input terminal of a second amplifying device a voltage according to a reference voltage applied to a reference terminals. First and second resistors are connected in series between the reference terminal and an input terminal of... | 02/26/2009 |
| 20090039961 | Low quiescent current output stage and method with improved output drive Circuitry for increasing the maximum output current magnitude of a diamond buffer (Q57,58,74,75) having increased maximum output current provides a bias current of a first magnitude (I) into an emitter of a PNP first input transistor (Q57) and sinks a bias... | 02/12/2009 |
| 20090015336 | Segmented power amplifier A system for amplifying a signal is provided. The system includes a plurality of driver stages, each having an input, an output, and a disable control. An output stage having an input is coupled to the outputs of the plurality of driver stages. A plurality of disable co... | 01/15/2009 |
| 20080315953 | Variable Gain Mixer There is provided a variable gain mixer capable of controlling a gain at a low source voltage in a wide range without additional current consumption. The mixer includes: mixers constructed with variable gain amplifiers having two transistor... | 12/25/2008 |
| 20080309413 | GAIN SWITCHING LOW-NOISE AMPLIFIER CIRCUIT In a gain switching LNA including a first transistor, a first transistor group (for example, second to ninth transistors) and a second transistor group (for example, tenth to seventeenth transistors), a first resistor connected between an emitter of the tenth transistor... | 12/18/2008 |
| 20080258817 | HYBRID CONCURRENT AND SWITCHED DUAL-BAND LOW NOISE AMPLIFIER The present invention provides a system and method for operating hybrid concurrent and switched dual-band low noise amplifiers. Embodiments use a concurrent design at the input block of a hybrid LNA to advantageously achieve better impedance matching while using a switc... | 10/23/2008 |
| 20080224780 | TRANSCONDUCTANCE CONTROL CIRCUIT, METHOD OF CONTROLLING TRANSCONDUCTANCE, AND A POWER AMPLIFIER A transconductance control circuit, comprising: a test transconductance circuit for providing an output current from a reference voltage; apparatus for deriving a bias current for the test transconductance circuit from the output current, the bias current including a co... | 09/18/2008 |
| 20080204145 | BIAS CONTROL CIRCUIT AND METHOD OF CONTROLLING BIAS OF RF POWER AMPLIFIER A bias control circuit for an RF amplifier having an output device for providing an output signal to a load and a driver device for driving the output device includes a current mirror circuit for providing a driver device bias current to the driver device and an output ... | 08/28/2008 |
| 20080186100 | VARIABLE-GAIN AMPLIFICATION CIRCUIT, RECEIVER AND RECEIVER IC Disclosed herein is a variable-gain amplification circuit, wherein the sources of first and second MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) are tied to a common connection point connected to a current source. An input signal is supplied to the gates ... | 08/07/2008 |
| 20080186099 | Power amplifier and multistage amplification circuit including same A bias circuit 22 in a power amplifier 1 is provided with a VBE-controlled voltage source circuit 20 and a Nagata current mirror circuit 21. The Nagata current mirror circuit 21 includes a transistor Tr5 and a transistor Tr6.... | 08/07/2008 |
| 20080180169 | Multimode amplifier for operation in linear and saturated modes According to an exemplary embodiment, a multimode power amplifier configured to receive an RF input signal and provide an RF output signal in linear and saturated operating modes includes an output stage configured to receive a fixed supply voltage and to provide the RF... | 07/31/2008 |
| 20080150637 | Electronics parts for high frequency power amplifier This invention provides an electronic part for high frequency power amplification (RF power module) which will automatically perform the precharge level setting for proper output power at start of transmission without requiring the software process for precharging to ru... | 06/26/2008 |
| 20080136524 | Amplifier circuit, semiconductor device, and controlling method An amplifier circuit including a plurality of CMOS (Complementary Metal Oxide Semiconductor) inverter circuits connected in parallel with each other. The CMOS inverter circuits each include a first PMOS (P-channel Metal Oxide Semiconductor) transistor, a first NMOS (N-c... | 06/12/2008 |
| 20080111629 | Constant current bias circuit and associated method A constant current bias circuit and associated method is disclosed. The constant current bias circuit comprises an output stage for amplifying a radio frequency (RF) signal, wherein the output stage is operably coupled with a voltage. The constant current bias circuit f... | 05/15/2008 |
| 20080024227 | Communication semiconductor integrated circuit device and wireless communication system The present invention provides a communication semiconductor integrated circuit device equipped with a high-frequency power amplifier circuit including a gain control amplifier and a bias circuit which supplies such a bias current as to linearly change the gain of the g... | 01/31/2008 |
