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| Number | Title | Issue Date |
| 8188789 | Apparatus for improving performance at low power region in a Doherty amplifier A method and apparatus improve the performance of a carrier amplifier in a Doherty amplifier. The Doherty amplifier includes a power divider, a carrier amplifier, at least one peaking amplifier, offset lines, and a Doherty circuit. The power divider provides a power... | 05/29/2012 |
| 8183923 | Constant gain amplifier system with gain control feedback Constant and accurate signal gain systems based on controlling signal amplifier gain level by applying the signal amplifier output signal to a signal level divider with a set ratio. The output signal of the signal level divider is applied to one input of the gain co... | 05/22/2012 |
| 8179200 | Amplifier circuit and light receiving amplifier circuit using the same An amplifier circuit includes an amplifier unit that amplifies a signal received by an input terminal and outputs the amplified signal to an output terminal, a feedback capacitor that is connected between the input terminal of the amplifier and the output terminal, ... | 05/15/2012 |
| 8179195 | Current-feedback instrumentation amplifiers Current-feedback instrumentation amplifiers that include dynamic element matching for the input transconductance amplifiers by periodically swapping the transconductance amplifiers between the instrumentation amplifier input and the feedback input. The instrumentati... | 05/15/2012 |
| 8175533 | Wireless transceiver within an electrical receptacle system An electrical receptacle assembly having a housing that includes a wireless transceiver electrically coupled to one or more antennas that can be integrated into the receptacle housing itself or in the receptacle's faceplate. The one or more antennas can be one or mo... | 05/08/2012 |
| 8174322 | Power control of reconfigurable outphasing chireix amplifiers and methods Various embodiments relate to a reconfigurable integrated digital Chireix out-phasing power amplifier for use in high power base stations is described and a related method of said design. The power amplifier may include a power transistor circuitry having plurality ... | 05/08/2012 |
| 8174311 | Switching amplifier A switching amplifier (200; 300; 400; 500) comprising: a switch (202; 302) configured to electrically connect and disconnect a first pin (202a; 302a) of the switch (202; 302) to a second pin (202b; 30... | 05/08/2012 |
| 8164389 | Overdrive protection circuit Embodiments of circuits, apparatuses, and systems for an overdrive protection circuit arranged at an input to a primary power transistor to protect against overdrive conditions, where the overdrive protection circuit includes a sensing resistor. Other embodiments ma... | 04/24/2012 |
| 8159293 | Nested transimpendance amplifier A nested transimpedance amplifier circuit including a first power source, a second power source, a charge pump module and a transimpedance amplifier. The first power source is at a first voltage. The second power source is at a second voltage. The second voltage is ... | 04/17/2012 |
| 8159292 | Amplifying circuit To efficiently obtain two outputs including one at a normal level and the other at an excessive level. An input signal input to the negative input terminal of an operational amplifier (14) having a negative feedback path is amplified to output an output signa... | 04/17/2012 |
| 8154346 | Short circuits and power limit protection circuits In one embodiment, a method includes: detecting one of a short-to-ground condition and a short-to-supply condition at an output node; selectively activating a feedback control transistor according to the detecting; detecting a first current passing through a first t... | 04/10/2012 |
| 8154341 | Power amplifying apparatus A power amplifying apparatus includes a high-speed low pass filter which inputs an envelope signal included in a transmission signal therein, a low-speed low pass filter which inputs the envelope signal therein, a determination unit which inputs the envelope signal ... | 04/10/2012 |
| 8155333 | Active noise control apparatus An active noise control apparatus that controls by a control sound a noise which is output from a noise source, includes: a control sound generating section which inputs a control signal, and produce the control sound; a residual noise detecting section which detect... | 04/10/2012 |
| 8149060 | Low distortion amplifier and Doherty amplifier using low distortion amplifier Provided is a low distortion amplifier which can satisfy both securement of a setting space in a vicinity of a transistor and low impedance. The low distortion amplifier includes a short stub having a leading end thereof short-circuited with a high-frequency short-c... | 04/03/2012 |
| 8149059 | Method and apparatus for compensating for gain changes in an amplifier circuit In a method and apparatus for compensating for gain changes in an amplifier circuit comprising radio-frequency modules and attenuation elements, a radio-frequency module is driven with a first temperature-dependent monitoring voltage UHF(T), and an attenu... | 04/03/2012 |
| 8149057 | Signal processing circuit A signal processing circuit includes a waveform shaping section that applies a first gain to an input signal and generates a first signal when an absolute value of a level of the input signal falls within a first input range from a first level to a second level, a v... | 04/03/2012 |
| 8143946 | Current to voltage converter A current to voltage converter which includes a common gate transconductance element having at least one input and one output. The current to voltage converter further includes a common source transconductance element having at least one input and one output, where ... | 03/27/2012 |
| 8143952 | Three dimensional inductor and transformer A three dimensional on-chip inductor, transformer and radio frequency amplifier are disclosed. The radio frequency amplifier includes a pair of transformers and a transistor. The transformers include at least two inductively coupled inductors. The inductors include ... | 03/27/2012 |
| 8138826 | Apparatus and method for complete elimination of input coupling capacitors in signal amplification A circuit and method for signal amplification is provided. The circuit includes an amplifier including an input amplifier that is arranged to receive an input analog signal, and to provide an input amplifier output signal by amplifying the input analog signal. The a... | 03/20/2012 |
| 8130041 | Power amplifier device Provided is a power amplifier device. The power amplifier device includes: a cutoff unit cutting off a direct current (DC) component of a signal delivered from a signal input terminal; a circuit protecting unit connected to the cutoff unit and stabilizing a signal d... | 03/06/2012 |
| 8130037 | Apparatus and method for reducing current noise An input bias current cancellation circuit includes reference transistors placed in series and a current summation network. The current summation network can be configured to sum the base currents of the reference transistors to produce a summed current. A current m... | 03/06/2012 |
| 8120423 | OP-AMP sharing with input and output reset An operational amplifier with two pairs of differential inputs for use with an input switch capacitor network. The operational amplifier has reset devices for resetting the second pair of differential inputs while amplifying the first pair of differential inputs, an... | 02/21/2012 |
| 8120421 | Circuit structure free from test effect and testing method thereof A circuit structure free from test effect is provided. The circuit structure includes a first test terminal and a second test terminal. A symmetric circuit unit is coupled between the first test terminal and the second test terminal. The symmetric circuit unit inclu... | 02/21/2012 |
| 8115553 | High linearity, low noise, wide bandwidth amplifier/buffer A radio frequency wide band amplifier having a noise that does not exceed a threshold value, and a linearity better than a threshold value. The radio frequency wide band amplifier architecture includes a first stage amplifier and a second stage amplifier. The second... | 02/14/2012 |
| 8115547 | Reconfigurable power amplifier and use of such amplifier for making a multi-standard amplification stage for mobile phone communications A reconfigurable power amplifier includes at least one amplification circuit (E1, E2), and a circuit (6) for controlling the amplification circuit so as to adapt its operation according to an applied input signal (RFin). The circuit f... | 02/14/2012 |
| 8115542 | Variable frequency class-D amplifier, control method thereof, and ramp generator therefor A class-D amplifier includes a ramp generator to provide a ramp signal having a frequency varying with an audio input signal, and a modulator to convert the audio input signal to a pulse width modulation signal according to the ramp signal for a driver to drive a lo... | 02/14/2012 |
| 8115543 | Mixed-signal transmission circuit for switching power amplifiers The invention relates to an upstream unit (1) for a switched power amplifier (2) for a high-frequency transmission circuit (16). The upstream unit (1) supplies a pulse-length modulated HF pulse signal (22) to the switched power amp... | 02/14/2012 |
| 8115555 | Balun function with reference enhancement in single-ended port Systems and methods are provided for a transformer or balun function with reference enhancement. The systems and methods may include a transformer having at least a primary winding and a secondary winding for reference enhancement, where the primary winding includes... | 02/14/2012 |
| 8115546 | Apparatus and method for maximizing performance of peaking amplifier in doherty amplifier An apparatus and method for maximizing the performance of a peaking amplifier in a Doherty amplifier are provided. The apparatus includes a splitter, a carrier amplifier, an (N−1) number of peaking amplifiers, a Doherty combiner, and an output load. The splitter s... | 02/14/2012 |
| 8115548 | Apparatus and method for controlling distortions of amplifier Disclosed are an apparatus and method for controlling output distortions of an amplifier. The apparatus for controlling output distortions of an amplifier, includes a compensation signal generator to predict a fluctuation of a supply voltage of a power supply using ... | 02/14/2012 |
| 8111097 | Device with reconfigurable continuous and discrete time functionality A programmable system includes a programmable analog device including an operational amplifier to generate an output voltage based on input voltages at terminals of the operational amplifier. The programmable system also includes a system controller to direct the pr... | 02/07/2012 |
| 8111098 | Segmented linear FM power amplifier Various apparatuses and methods for amplifying an FM signal in a segmented linear power amplifier are disclosed herein. For example, some embodiments provide an apparatus including a signal input, a signal output, and an output driver connected between the signal in... | 02/07/2012 |
| 8102213 | Multi-mode low noise amplifier with transformer source degeneration A multi-mode low noise amplifier (LNA) with transformer source degeneration is described. In an exemplary design, the multi-mode LNA includes first, second, and third transistors and first and second inductors. The first transistor has its source coupled to the firs... | 01/24/2012 |
| 8098092 | Power amplifier A Doherty amplifier is provided with a clipping circuit for making signal power flow to ground if the signal power becomes equal to or higher than a predetermine value in order to prevent a carrier amplifier, which is a small amplifier, from being destroyed if the s... | 01/17/2012 |
| 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 |
| 8098099 | Broadband high output current output stage A broadband high output current output stage includes at least one first differential pair for enhancing the bandwidth. A second differential pair is further disposed in the circuit. The second differential pair is coupled to one of the first differential pair, such... | 01/17/2012 |
| 8085090 | Method and system for polar modulating QAM signals with discontinuous phase Aspects of a method and system for polar modulating QAM signals with discontinuous phase may include amplifying a signal via a plurality of amplifiers such that a combined gain of the plurality of amplifiers comprises a coarse amplitude gain and an amplitude offset ... | 12/27/2011 |
| 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 |
| 8077873 | System for active noise control with adaptive speaker selection An active noise control system generates an anti-noise signal to drive a first speaker group including at least one speaker to produce sound waves to destructively interfere with an undesired sound in at least one quiet zone. The active noise control system receives... | 12/13/2011 |
| 8072266 | Class G amplifier with improved supply rail transition control An apparatus and method are provided for a Class G amplifier that includes an output stage, where an output stage supply voltage is selected based upon an input signal voltage of the output stage. The amplifier may also include an input stage coupled to the output s... | 12/06/2011 |
