| 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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| 09/08/2005 | US20050195031 Switched mode power amplifier using lumped element impedance inverter for parallel combining |
| 09/08/2005 | US20050195030 Predistorter |
| 09/08/2005 | US20050195024 Apparatus and method for DC offset reduction |
| 09/08/2005 | US20050194997 Amplitude limiting circuit |
| 09/07/2005 | EP0855101B1 An amplifier and a method for detecting the presence of a load |
| 09/07/2005 | CN2724295Y High speed high gain amplifier |
| 09/07/2005 | CN1666424A Blind cancellation of cross-modulation by addition of modulated signal |
| 09/07/2005 | CN1666410A Semiconductor integrated circuit and semiconductor integrated circuit manufacturing method |
| 09/07/2005 | CN1666409A Memory-effect distortion correction by predistortion |
| 09/07/2005 | CN1666408A Predistortion control |
| 09/07/2005 | CN1665142A 模数转换器 ADC |
| 09/07/2005 | CN1665133A Transmitting circuit, communication equipment, audio equipment, video equipment, and transmitting method |
| 09/07/2005 | CN1665126A High-voltage amplifier |
| 09/07/2005 | CN1664738A Voltage generator and method for generating stabilized voltage |
| 09/07/2005 | CN1218477C Parallel amplifier architecture using digital phase control techniques |
| 09/07/2005 | CN1218476C Method and circuit for distortion compensation and output control |
| 09/07/2005 | CN1218475C Adaptive linearization of power amplifiers |
| 09/07/2005 | CN1218474C Power modulation systems and methods that separately amplify low and high frequency portions of an amplitude waveform |
| 09/06/2005 | US6941122 Circuit for compensating temperature of automatic gain control circuit |
| 09/06/2005 | US6941118 Negative feedback amplifier and method of controlling loop gain thereof |
| 09/06/2005 | US6940985 Shock sound prevention circuit |
| 09/06/2005 | US6940981 Apparatus and method of limiting power applied to a loudspeaker |
| 09/06/2005 | US6940351 Amplifying circuit for transmitter capable of reducing noise |
| 09/06/2005 | US6940350 Amplifier and method for canceling nonlinearity in amplifier |
| 09/06/2005 | US6940349 Transmitter including a composite amplifier |
| 09/06/2005 | US6940348 Differential amplifier circuit with common mode output voltage regulation |
| 09/06/2005 | US6940346 Feedforward amplifier, communication apparatus, feedforward amplification method, program and medium |
| 09/06/2005 | US6940345 Supplying a ramp voltage to an amplifier |
| 09/06/2005 | US6940344 D-class signal amplification circuit |
| 09/06/2005 | US6939736 Ideal operational amplifier layout techniques for reducing package stress and configurations therefor |
| 09/01/2005 | WO2005081414A1 Control of a power amplifier for reducing power consumption in a transceiver |
| 09/01/2005 | WO2005081401A1 Electrical apparatus and cooling system |
| 09/01/2005 | WO2005081400A1 Audio amplification device with antipop circuitry |
| 09/01/2005 | WO2005081399A1 Power amplifier with stabilising network |
| 09/01/2005 | US20050192043 Communication terminal |
| 09/01/2005 | US20050191981 Method and device for amplifying a reception signal |
| 09/01/2005 | US20050190857 Digital predistortion system and method for linearizing an RF power amplifier with nonlinear gain characteristics and memory effects |
| 09/01/2005 | US20050190518 Current detection circuit and protection circuit |
| 09/01/2005 | US20050189996 Self-biased darlington amplifier |
| 09/01/2005 | US20050189995 Multi-primary distributed active transformer amplifier power supply and control |
| 09/01/2005 | US20050189994 Electronic signal amplifier and method and article for determining the gain of such an amplifier |
| 09/01/2005 | US20050189992 Bipolar differential input stage with input bias current cancellation circuit |
| 09/01/2005 | US20050189990 Method and apparatus for control of predistortion linearizer based on power series |
| 09/01/2005 | US20050189989 Power amplification apparatus, and mobile communication terminal apparatus |
| 09/01/2005 | US20050189980 Electronic isolator |
| 09/01/2005 | CA2556049A1 Electrical apparatus and cooling system |
| 08/31/2005 | EP1569359A1 Method and apparatus for optimizing transmitter power efficiency |
| 08/31/2005 | EP1569350A1 Power limit device and digital radio transmitter using the same |
| 08/31/2005 | EP1569331A1 Method and apparatus for control of predistortion linearizer based on power series |
| 08/31/2005 | EP1569330A1 Method and apparatus for improving power amplifier efficience in wireless communication systems having high peak to average power ratios |
| 08/31/2005 | EP1568236A2 Continuously variable gain radio frequency driver amplifier having linear in decibel gain control characteristics |
| 08/31/2005 | EP1568126A1 Travelling-wave amplifier |
| 08/31/2005 | EP1568125A1 Pulse width-modulated noise shaper |
| 08/31/2005 | EP0847620B1 Circuit arrangement comprising a feedback loop |
| 08/31/2005 | CN1663116A Device and method for controlling forward amplifiers |
| 08/31/2005 | CN1663115A Improved power amplifier configuration |
| 08/31/2005 | CN1661928A Distortion compensation circuit, power amplifier using distortion compensation circuit, and distortion compensation signal generating method |
| 08/31/2005 | CN1661927A Method and apparatus for optimizing transmitter power efficiency |
| 08/31/2005 | CN1661910A Gain control circuit and relevant amplifier |
| 08/31/2005 | CN1661906A Saturation type microwave amplifier of single electrical source |
| 08/31/2005 | CN1661379A Current detection circuit and protection circuit |
| 08/31/2005 | CN1217536C Shock sound prevention circuit |
| 08/30/2005 | US6937721 Broadband driver circuit |
| 08/30/2005 | US6937720 xDSL class C-AB driver |
| 08/30/2005 | US6937669 Digital predistortion system for linearizing a power amplifier |
| 08/30/2005 | US6937195 Inverted-F ferroelectric antenna |
| 08/30/2005 | US6937175 Amplifier linearization using delta-sigma predistortion |
| 08/30/2005 | US6937102 Low bias current/temperature compensation current mirror for linear power amplifier |
| 08/30/2005 | US6937101 Dual mode power amplifier having a common controller |
| 08/30/2005 | US6937099 Op-amp configurable in a non-inverting mode with a closed loop gain greater than one with output voltage correction for a time varying voltage reference of the op-amp, and a method for correcting the output voltage of such an op-amp for a time varying voltage reference |
| 08/30/2005 | US6937097 High-frequency power amplifier having differential inputs |
| 08/30/2005 | US6937094 Systems and methods of dynamic bias switching for radio frequency power amplifiers |
| 08/30/2005 | US6937071 High frequency differential power amplifier |
| 08/30/2005 | US6937001 Circuit for generating a reference voltage having low temperature dependency |
| 08/25/2005 | WO2005078921A2 Radio frequency low noise amplifier with automatic gain control |
| 08/25/2005 | WO2005078920A1 Field effect transistor amplifier with linearization |
| 08/25/2005 | WO2005078918A1 Load-invariant amplifier |
| 08/25/2005 | WO2005078917A1 Dynamically biased amplifier |
| 08/25/2005 | WO2005078916A1 Programmable radio transceiver |
| 08/25/2005 | WO2005078861A2 Inverted-f ferroelectric antenna |
| 08/25/2005 | WO2005078601A2 Apparatus and method for isolating noise effects in a signal |
| 08/25/2005 | WO2005029711A3 Single-ended input, differential output low noise amplifier |
| 08/25/2005 | US20050186930 Adaptive radio transceiver with offset PLL with subsampling mixers |
| 08/25/2005 | US20050186919 Switch apparatus, switchable power amplification apparatus, and mobile communication terminal apparatus using the same |
| 08/25/2005 | US20050185710 Adaptive equalizer with DC offset compensation |
| 08/25/2005 | US20050185355 Semiconductor integrated circuit device |
| 08/25/2005 | US20050185315 High speed pre-driver with voltage reference for thin film head write driver |
| 08/25/2005 | US20050184813 Multi-primary distributed active transformer oscillator power supply and control |
| 08/25/2005 | US20050184809 Current limiting circuit with rapid response feedback loop |
| 08/25/2005 | US20050184808 Monolithically fabricated HBT amplification stage with current limiting FET |
| 08/25/2005 | US20050184806 High frequency amplifier circuit |
| 08/25/2005 | US20050184805 Differential amplifier circuit |
| 08/25/2005 | US20050184803 Distortion compensation circuit, power amplifier using distortion compensation circuit, and distortion compensation signal generating method |
| 08/25/2005 | US20050184802 Distortion management apparatus, systems, and methods |
| 08/25/2005 | US20050184801 Adaptive equalizer with DC offset compensation |
| 08/25/2005 | US20050184800 Post amplifier array integrated circuit |
| 08/25/2005 | US20050184675 Field emission RF amplifier |
| 08/25/2005 | DE10345521B3 Verstärkeranordnung Amplifier arrangement |
| 08/25/2005 | DE102005003650A1 Leistungsverstärkermodul A power amplifier module |
| 08/25/2005 | CA2555960A1 Load-invariant amplifier |