| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
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| 10/15/2008 | CN101288227A Feedback controller for PWM amplifier |
| 10/15/2008 | CN101288226A Temperature compensated voltage regulator integrated with mmic's |
| 10/15/2008 | CN101286963A Wideband adaptive digital predistortion engine apparatus based on programmable device |
| 10/15/2008 | CN101286962A Carrier balancing radio frequency predistortion power amplifier realizing apparatus and method |
| 10/15/2008 | CN101285706A Differential input low-temperature infrared detector weak current amplifier |
| 10/15/2008 | CN100426706C Feed forward amplifier |
| 10/15/2008 | CN100426671C Impedance matching networks of non-linear circuits |
| 10/15/2008 | CN100426664C High-frequency amplifier, feed-forward amplifier and distortion compensation amplifier |
| 10/15/2008 | CN100426663C Digital predistorter using power series model |
| 10/15/2008 | CN100426662C Power amplifier |
| 10/15/2008 | CN100426661C Power booster method and apparatus for improving the performance of radio frequency linear power amplifiers |
| 10/15/2008 | CN100426660C Warm back-up and multual-aid system of power amplifier |
| 10/15/2008 | CN100426659C Multi-level output circuit |
| 10/14/2008 | US7437129 Electric component for communication device and semiconductor device for switching transmission and reception |
| 10/14/2008 | US7437084 Infrared radiation receiving circuit, electronic device, and infrared radiation receiving method |
| 10/14/2008 | US7436967 Apparatus and method of limiting power applied to a loudspeaker |
| 10/14/2008 | US7436918 Output stage synchronization |
| 10/14/2008 | US7436900 Intermodulation distortion identification and quantization circuit for a linear amplifier system |
| 10/14/2008 | US7436259 Amplification apparatus |
| 10/14/2008 | US7436258 Multi-operational amplifier system |
| 10/14/2008 | US7436257 High-efficiency mixed-mode power amplifier |
| 10/14/2008 | US7436247 Step-down circuit with stabilized output voltage |
| 10/14/2008 | CA2313471C Programmable linear receiver |
| 10/09/2008 | WO2008120339A1 Av device and amplifier |
| 10/09/2008 | WO2008120318A1 Distortion correction control apparatus and distortion correction control method |
| 10/09/2008 | WO2008120308A1 Amplification circuit |
| 10/09/2008 | WO2008120123A1 An improved amplifier |
| 10/09/2008 | WO2008119166A1 Active guarding for reduction of resistive and capactive signal loading with adjustable control of compensation level |
| 10/09/2008 | WO2008119164A1 Amplifier pre-distortion systems and methods |
| 10/09/2008 | WO2006034311A3 Low voltage track and hold circuits |
| 10/09/2008 | WO2004095715A3 Additive digital predistortion system employing parallel path coordinate conversion |
| 10/09/2008 | CA2703361A1 Active guarding for reduction of resistive and capacitive signal loading with adjustable control of compensation level |
| 10/08/2008 | EP1978638A2 A negative gm circuit, a filter and low noise amplifier including such a filter |
| 10/08/2008 | EP1978637A2 Flat-panel television and audio equipment |
| 10/08/2008 | EP1978636A1 Amplifier having an output protection, in particular operational amplifier for audio application |
| 10/08/2008 | EP1978635A1 Circuitry and method for reducing second and third-order nonlinearities |
| 10/08/2008 | EP1977506A2 Systems and methods for over-current protection |
| 10/08/2008 | EP1977505A1 Signal conditioning circuit |
| 10/08/2008 | EP1977504A1 Single-ended amplifier |
| 10/08/2008 | EP1315289B1 Power amplifier module |
| 10/08/2008 | EP1293039B1 High linearity multicarrier rf amplifier |
| 10/08/2008 | CN101282110A Low-power consumption single-ended input difference output low-noise amplifier |
| 10/08/2008 | CN100424994C Attenuation control for digital power converters |
| 10/08/2008 | CN100424993C Feedback amplifier having amplified signal path and feedback signal path separated |
| 10/07/2008 | US7433743 Process control using co-ordinate space |
| 10/07/2008 | US7433477 Audio superpositioning |
| 10/07/2008 | US7433422 Method for generating a signal with a definable pulse shape |
| 10/07/2008 | US7432924 3D digital subtraction angiography image processing apparatus |
| 10/07/2008 | US7432778 Arrangement and method impedance matching |
| 10/07/2008 | US7432767 Tunable low noise amplifier |
| 10/07/2008 | CA2321571C A differential line driver |
| 10/02/2008 | WO2008117701A1 Overheat protection circuit of audio device |
| 10/02/2008 | WO2008117399A1 Amplifier circuit |
| 10/02/2008 | WO2008116402A1 The predistortion apparatus, transmitter and the method |
| 10/02/2008 | US20080242257 Field effect transistor amplifier with linearization |
| 10/02/2008 | US20080242246 Rf Transmitter With Compensation of Differential Path Delay |
| 10/02/2008 | US20080239597 Peak Voltage Protection Circuit and Method |
| 10/02/2008 | US20080238552 Semiconductor device |
| 10/02/2008 | US20080238544 Amplifier pre-distortion systems and methods |
| 10/02/2008 | US20080238539 Arrangement for canceling offset of an operational amplifier |
| 10/02/2008 | US20080238538 Receiving device and related method for calibrating dc offset |
| 10/01/2008 | EP1976111A2 Pop-noise prevention method and apparatus |
| 10/01/2008 | EP1421680B1 Pre-distortion using a by-pass signal |
| 10/01/2008 | CN201127015Y Audio power amplifier capable of reducing unwanted sound remarkably |
| 10/01/2008 | CN101277096A Semiconductor device |
| 10/01/2008 | CN101277094A Operation amplifier capable of compensating migration voltage |
| 09/30/2008 | US7430248 Predistortion circuit and method for compensating nonlinear distortion in a digital RF communications transmitter |
| 09/30/2008 | US7429892 Model based distortion reduction for power amplifiers |
| 09/30/2008 | US7429890 PWM digital amplifier with high-order loop filter |
| 09/25/2008 | WO2008115907A1 Linear transconductor for rf communications |
| 09/25/2008 | WO2008115749A2 Power efficient multistage amplifier and design method |
| 09/25/2008 | WO2008114357A1 Electronic device |
| 09/25/2008 | WO2008114346A1 Distortion compensating device and its delay time estimating method |
| 09/25/2008 | WO2008114311A1 Low-noise amplifier |
| 09/25/2008 | US20080231370 Apparatus and methods for amplifiers |
| 09/25/2008 | US20080231367 Amplifier |
| 09/25/2008 | US20080231357 Method and system for gain control and power saving in broadband feedback low-noise amplifiers |
| 09/25/2008 | US20080231356 Voltage margining with a low power, high speed, input offset cancelling equalizer |
| 09/25/2008 | DE102008014930A1 Ausgangsschaltung und Leistungsbauteil Output circuit and power device |
| 09/24/2008 | EP1972055A2 Digital pwm amplifier with simulation-based feedback |
| 09/24/2008 | CN201122933Y Low output impedance and anode output driving circuit |
| 09/24/2008 | CN101273540A Multistage resonant amplifier system and method |
| 09/24/2008 | CN101273526A Electronic device with an amplifier output stage and an over-current detection means |
| 09/24/2008 | CN101273525A Amplifier with active post-distortion linearization |
| 09/24/2008 | CN101272155A TDD mode digital predistortion power amplifier |
| 09/24/2008 | CN101272131A Programmable gain amplifier with noise cancellation |
| 09/24/2008 | CN101272130A High-tension resistant power amplifier circuit and its use method |
| 09/24/2008 | CN101272129A Amplifier for exerting negative feedback on electronic tube screen grid |
| 09/23/2008 | US7427896 Device and method for predistorting and input signal |
| 09/23/2008 | US7427894 Dual-mode, dual-load high efficiency RF power amplifier |
| 09/23/2008 | US7427893 Circuit and method for controlling the power mode a class-D amplifier |
| 09/18/2008 | WO2008112611A1 Frequency selective amplifier with wide-band impedance and noise matching |
| 09/18/2008 | WO2008112041A2 Power supply providing ultrafast modulation of output voltage |
| 09/18/2008 | WO2008111883A1 Flexible dynamic range amplifier |
| 09/18/2008 | WO2008111491A1 Tertiary mutual modulation distortion compensation amplifier and low-noise amplifier using the same |
| 09/18/2008 | WO2008111471A1 Ofdm modulated wave output device and distortion compensation method |
| 09/18/2008 | WO2008111196A1 Power control circuit and power amplifier power control method |
| 09/18/2008 | WO2008111172A1 Power amplifier |
| 09/18/2008 | WO2008110444A2 Amplifier arrangement and method for amplifying a signal |
| 09/18/2008 | US20080224772 Operational Amplifier Selecting One of Inputs, and an Amplifying Apparatus Using the Op Amplifier the Verification Method |