| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 06/06/2006 | US7057370 Ultra-fast precision motor with X, Y and Theta motion and ultra-fast optical decoding and absolute position detector |
| 06/06/2006 | CA2173389C Ccd register read amplifier |
| 06/01/2006 | WO2006057104A1 Semiconductor device and power amplifier |
| 06/01/2006 | WO2006057077A1 Semiconductor device and power amplifier |
| 06/01/2006 | WO2006056321A1 Power amplifier for amplifying high-frequency (h.f.) signals |
| 06/01/2006 | WO2005104359A8 Travelling wave amplifier |
| 06/01/2006 | US20060115101 Multiple amplifier synchronization system |
| 06/01/2006 | US20060114075 Transmitter and a method of calibrating power in signals output from a transmitter |
| 06/01/2006 | US20060114068 Phase-locked loop circuit |
| 06/01/2006 | US20060114066 Distortion compensating circuit having negative gain deviation, power amplifier using the same, and communication device having power amplifier |
| 06/01/2006 | US20060114065 High linearity digital variable gain amplifier |
| 06/01/2006 | US20060114064 Doherty amplifier and its distortion characteristic compensation method |
| 06/01/2006 | US20060114063 Method and system for constant or proportional to absolute temperature biasing for minimizing transmitter output power variation |
| 06/01/2006 | US20060114061 Class AB CMOS output circuit equiped with CMOS circuit operating by predetermined operating current |
| 06/01/2006 | US20060114060 Composite amplifier structure |
| 06/01/2006 | US20060114058 D-class audio power amplifier and method thereof |
| 06/01/2006 | US20060114057 Power multiplier system and method |
| 06/01/2006 | US20060114056 Offset cancellation in a switching amplifier |
| 06/01/2006 | US20060114016 Semiconductor device |
| 06/01/2006 | DE102004056435A1 Leistungsverstärker zum Verstärken von Hochfrequenz(HF)-Signalen Power amplifier for amplifying radio frequency (RF) signals |
| 06/01/2006 | DE102004052174A1 Verstärker mit tiefpassgefilterter Rückkopplung Amplifier with low-pass filtered feedback |
| 06/01/2006 | DE10054971B4 Pufferschaltung und Halteschaltung Buffer circuit and hold circuit |
| 05/31/2006 | EP1661242A1 Transistor arrangement, integrated circuit and method for operating field effect transistors |
| 05/31/2006 | EP1374394B1 Digital signal processor enhanced pulse width modulation amplifier |
| 05/31/2006 | EP1338089A4 Active continuous-time filter with increased dynamic range in the presence of blocker signals |
| 05/31/2006 | EP1101278B1 A method of attenuating zero crossing distortion and noise in an amplifier, an amplifier and uses of the method and the amplifier |
| 05/31/2006 | CN2785256Y Current module high fidelity power amplifier |
| 05/31/2006 | CN1781244A N-way RF power amplifier circuit with increased back-off capability and power added efficiency using selected phase lengths and output impedances |
| 05/31/2006 | CN1780762A N-way RF power amplifier circuit with increased back-off capability and power added efficiency using unequal input power division |
| 05/31/2006 | CN1780140A Method and apparatus for limiting power amplifier voltage excursions |
| 05/31/2006 | CN1780044A Microwave switch and power amplifier thermal back-up, its mutual system and realization thereof |
| 05/31/2006 | CN1258311C Portable power amplifier |
| 05/31/2006 | CN1258260C Photoelectrically coupled phase inverter circuit |
| 05/30/2006 | US7054597 Power control for a transmitter |
| 05/30/2006 | US7054439 Differential input stage for electronic equipment, comprising means for reducing interference caused by a voltage or current in common mode |
| 05/30/2006 | US7054384 Power amplifier sharing in a wireless communication system with transmit diversity |
| 05/30/2006 | US7053718 Stacked RF power amplifier |
| 05/30/2006 | US7053717 Method and apparatus for realizing a low noise amplifier |
| 05/30/2006 | US7053716 Controlled impedance bias circuit |
| 05/30/2006 | US7053714 Methods and apparatus for switching between class A and A/B operation in a power amplifier |
| 05/30/2006 | US7053713 Multi-phase switching power supply having both voltage and current feedback loops |
| 05/30/2006 | US7053712 Method and apparatus for controlling common-mode output voltage in fully differential amplifiers |
| 05/30/2006 | US7053711 Multistage differential amplifier |
| 05/30/2006 | US7053710 Vacuum tube amplifier having grid as output and plate as input |
| 05/30/2006 | US7053708 Electronic component for high frequency power amplifier and radio communication system |
| 05/30/2006 | US7053707 Method and system for implementing autonomous automatic gain control in a low noise broadband distribution amplifier |
| 05/30/2006 | US7053706 High linearity doherty communication amplifier with bias control |
| 05/30/2006 | US7053705 Mixed-mode (current-voltage) audio amplifier |
| 05/30/2006 | US7053704 Audio amplifier circuit with suppression of unwanted noise when starting from an off or standby state |
| 05/30/2006 | US7053703 Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit |
| 05/30/2006 | US7053702 Feed forward amplifier |
| 05/30/2006 | US7053701 Power amplifier output stage with multiple power states and improved efficiency |
| 05/30/2006 | US7053700 High-efficiency amplifier and method |
| 05/30/2006 | US7053698 Methods for extracting the mean (common mode) voltage of two input signals |
| 05/30/2006 | US7053695 Current source circuit and amplifier using the same |
| 05/30/2006 | US7053692 Powergate control using boosted and negative voltages |
| 05/30/2006 | US7053670 Semiconductor integrated circuit device and semiconductor integrated circuit |
| 05/30/2006 | US7053668 SOI sense amplifier with cross-coupled body terminal |
| 05/30/2006 | US7053596 Constant voltage generating circuit and reference voltage generating circuit |
| 05/26/2006 | WO2006055891A2 High efficiency doherty amplifier with a segmented main amplifier |
| 05/25/2006 | US20060109057 Amplifier circuit and light receiving apparatus |
| 05/25/2006 | US20060109056 Class ab cmos amplifiers |
| 05/25/2006 | US20060109055 Low noise op amp |
| 05/25/2006 | US20060109054 Method and apparatus for limiting power amplifier voltage excursions |
| 05/25/2006 | US20060109053 Series-Type Doherty Amplifier Without Hybrid Coupler |
| 05/25/2006 | US20060109050 Apparatus for removing DC offset and amplifying signal with variable gain simutaneously |
| 05/25/2006 | US20060109049 Low noise audio amplifier |
| 05/25/2006 | US20060109045 Precision rectifier circuit for high-density, low-power implantable medical device |
| 05/24/2006 | EP1659692A1 Method and apparatus for limiting power amplifier voltage excursions |
| 05/24/2006 | EP1658674A2 Power distribution and biasing in rf switch-mode power amplifiers |
| 05/24/2006 | EP1658673A2 Low noise, electric field sensor |
| 05/24/2006 | EP1658672A1 Integrated power amplifier circuit |
| 05/24/2006 | EP1658544A1 A constant-voltage circuit |
| 05/24/2006 | EP1082810B1 A gain control circuit and method for providing gain control of a variable amplifier using a pilot signal |
| 05/24/2006 | CN2783334Y Over current detector |
| 05/24/2006 | CN1778037A Systems and methods for providing multi channel pulse width modulated audio with staggered outputs |
| 05/24/2006 | CN1778036A Systems and methods for protection of audio amplifier circuits |
| 05/24/2006 | CN1777023A Light receiving amplification circuit |
| 05/24/2006 | CN1777022A Digital audio amplifier, an audio system including the same, and a method of amplifying an audio signal |
| 05/24/2006 | CN1257606C Microwave amplifier with bypass segment |
| 05/23/2006 | US7050724 Optical receiver |
| 05/23/2006 | US7050478 Apparatus and method for synchronizing clock modulation with power supply modulation in a spread spectrum clock system |
| 05/23/2006 | US7050024 Predictive control boost current method and apparatus |
| 05/23/2006 | US7049895 FET band amplifier |
| 05/23/2006 | US7049893 Apparatus, methods and articles of manufacture for power amplifier control in a communication system |
| 05/23/2006 | US7049892 High frequency power amplifier circuit device |
| 05/23/2006 | US7049891 Amplifier bias enhancement technique |
| 05/23/2006 | US7049890 Operational amplifier with self control circuit for realizing high slew rate throughout full operating range |
| 05/23/2006 | US7049889 Differential stage voltage offset trim circuitry |
| 05/23/2006 | US7049888 Active inductance circuit and differential amplifier circuit |
| 05/23/2006 | US7049885 Volume adjustment device, digital amplifier, and digital signal reproducing device |
| 05/23/2006 | US7049853 Resetable control circuit devices for sense amplifiers |
| 05/23/2006 | US7049848 Linear buffer |
| 05/23/2006 | US7049796 Hot swap power delivery circuit |
| 05/23/2006 | US7049729 Amplifier converting charge signal |
| 05/23/2006 | CA2178847C Tracking filter |
| 05/18/2006 | WO2006053098A1 Method and apparatus for calibrating analog circuits using statistical techniques |
| 05/18/2006 | WO2006051776A1 Amplifying circuit, radio communication circuit, radio base station device and radio terminal device |
| 05/18/2006 | WO2006051478A1 Arrangement for amplifying a pwm input signal |
| 05/18/2006 | WO2006050601A1 Driver circuit for driving a power amplifier |