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| Application No. | Application Title | Issue Date |
| 20110298536 | DISTORTION COMPENSATION AMPLIFIER To accelerate the convergence of distortion compensation and improve the performance of distortion compensation in a distortion compensation amplifier which performs distortion compensation with a pre-distortion scheme. Level detecting mean... | 12/08/2011 |
| 20110260790 | DUAL TIME ALIGNMENT ARCHITECTURE FOR TRANSMITTERS USING EER/ET AMPLIFIERS AND OTHERS An apparatus and method linearize a power amplifier in a transmitter by using a dual time alignment scheme. A first adjustable time delay unit delays a modulator signal input of a power amplifier. A first time delay estimator estimates a time delay between the delayed f... | 10/27/2011 |
| 20100060353 | Power amplifier linearization using RF feedback The power amplifier mainly includes a main amplifier, two splitters, one combiner, one subtracter, two phase shifters, one attenuator and one error amplifier. The splitters, subtracter and combiner are designed in the form of 90-degree or quadrature hybrid couplers. A q... | 03/11/2010 |
| 20090284315 | OPERATIONAL AMPLIFIER An operational amplifier includes, between an input and an output of an operational amplifier (an operational amplification stage) 10, a feedback capacitor 34 connected in negative feedback, a phase control circuit 100 having a resistor element (a r... | 11/19/2009 |
| 20090167433 | AUDIO APPARATUS An audio apparatus includes an input, a first resistor, a first capacitor, an amplifier, a second resistor, a second capacitor, and an output. The input is used for inputting audio signals. The first resistor and the amplifier are serially connected to the input; wherei... | 07/02/2009 |
| 20090097590 | Distortion-Compensated RF Transmitter and Method Therefor An RF transmitter (10) includes an RF amplifier (28) that generates an amplified RF signal (36) including a linear RF signal (92) and a spurious baseband signal (94). The spurious baseband signal (94) interacts with bias feed ne... | 04/16/2009 |
| 20070182482 | Technique to improve the gain and signal to noise ratio in CMOS switched capacitor amplifiers The present invention comprises switched capacitor amplifiers including positive feedback on semiconductor devices, wafers, and systems incorporating same and methods for amplifying signals using positive feedback, while maintaining a stable gain and producing an improv... | 08/09/2007 |
| 20070164817 | Ultrasound imaging or other use variable input impedance preamplifier A preamplifier has a variable input impedance. The input impedance is tailored with the signal level to maintain a more optimal performance. The input impedance is varied by at least two amplifiers connected in parallel. Each amplifier has a different input impedance. B... | 07/19/2007 |
| 20070115052 | Amplifiers with compensation An amplifier circuit comprises a first amplifier having an input and an output. A second amplifier has an input that communicates with an output of the first amplifier. A third amplifier has an input that communicates with an input of the first amplifier. A fourth ampli... | 05/24/2007 |
| 20070096808 | Nested transimpendance amplifier A differential transimpedance amplifier circuit comprises first, second, third and fourth operational amplifiers having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output. A first feedback element communicates... | 05/03/2007 |
| 20070013441 | Input matching apparatus and method for power amplifier using delta-sigma modulated signal An apparatus and method amplifies a delta-sigma modulated signal and delivers the amplified signal to a power amplifier without distortion in a communication system. The apparatus receives a delta-sigma modulated signal, phase-delays the received delta-sigma modulated s... | 01/18/2007 |
| 20060226901 | LOW PHASE SHIFT IMPLEMENTATION OF THE BASEBAND CIRCUITRY OF A CARTESIAN FEEDBACK LOOP A circuit is provided that includes a Cartesian feedback loop. The Cartesian feedback loop includes one or more operational amplifiers. At least one of the operational amplifiers includes two or more cascaded amplifier stages and one or more bypass amplifier stages. The... | 10/12/2006 |
| 20050270094 | Multistage amplifying devices, and reception device and transmission device using the same A multistage amplifying device for amplifying a desired signal comprise first to N-th amplifiers connected in cascade,wherein the k-th (k is 1 to N) amplifier includes a k-th amplification section; and a k-th feedback section which has a reactance component, changes a p... | 12/08/2005 |
| 20050270095 | Paralleling digital-input amplifiers Two or more digital-input RF amplifiers are configured in parallel such that a combiner combines their respective outputs to generate a relatively large composite RF output signal. A feedback control architecture minimizes the phase differences between the various ampli... | 12/08/2005 |
| 20050253651 | Stability compensation for adjustable gain amplifier Stability compensation for an amplifier with adjustable gain is provided via adjustable capacitance coupled to an input of a gain element within the amplifier. Gain of the amplifier is adjusted by an adjustable resistance coupled between the input and output of the gain... | 11/17/2005 |
| 20050184802 | Distortion management apparatus, systems, and methods An apparatus and a system, as well as a method and an article, may include detecting an indication of an amplifier output signal amplitude and responsively adjusting the amplifier input signal phase to reduce a change in the phase of the output signal. ... | 08/25/2005 |
