| 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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| 02/22/2005 | US6859103 Bias circuit for improving linearity of a radio frequency power amplifier |
| 02/22/2005 | US6859101 Frequency-selective phase/delay control for an amplifier |
| 02/22/2005 | US6859100 Class-A amplifier circuit having output voltage varied according to input voltage |
| 02/22/2005 | US6859099 Nonlinear distortion compensation power amplifier |
| 02/22/2005 | US6859098 Apparatus, methods and articles of manufacture for control in an electromagnetic processor |
| 02/22/2005 | US6859097 Radio frequency feedback amplifier circuits |
| 02/22/2005 | US6859096 Class D amplifier |
| 02/17/2005 | WO2005015757A1 Transmission device, transmission power control method, and radio communication device |
| 02/17/2005 | WO2005015756A1 Transmitter apparatus |
| 02/17/2005 | WO2005015753A2 Improved radio frequency digital-to-analog converter |
| 02/17/2005 | WO2005015733A1 Self-biased darlington amplifier |
| 02/17/2005 | WO2005002042A3 Integrated power amplifier circuit |
| 02/17/2005 | WO2004109907A3 Method and system for correcting non-linear response in amplifiers |
| 02/17/2005 | WO2004017512A9 High power doherty amplifier |
| 02/17/2005 | WO2003012982A9 Tuned damping circuit for power amplifier output |
| 02/17/2005 | US20050036650 Control scheme for signal processing arrangement |
| 02/17/2005 | US20050036645 High back EMF, high pressure subwoofer having small volume cabinet, low frequency cutoff and pressure resistant surround |
| 02/17/2005 | US20050036635 Audio signal output device |
| 02/17/2005 | US20050035821 High speed, high resolution amplifier topology |
| 02/17/2005 | US20050035820 Switchable operational amplifier circuit |
| 02/17/2005 | US20050035818 Predistortion circuit, low-distortion power amplifier, and control methods therefor |
| 02/17/2005 | US20050035817 Method and corresponding circuit structure to correlate the transconductance of transistors of different types |
| 02/17/2005 | DE102004037075A1 Vorverzerrer für phasenmodulierte Signale mit geringen Spitze-Mittelwert-Verhältnissen Predistorter for phase-modulated signals with low peak-to-average ratios |
| 02/17/2005 | DE102004034828A1 Eingangsschutzschaltkreis Input protection circuit |
| 02/16/2005 | EP1254508B1 System and method for auto-bias of an amplifier |
| 02/16/2005 | CN1581682A 功率放大器 PA |
| 02/16/2005 | CN1581680A Preamplifier gain switching circuit and method |
| 02/16/2005 | CN1581679A Audio-frequency signal output apparatus |
| 02/16/2005 | CN1190005C Circuit reducing disortion and noise of square-wave pulses, and use of method and circuit |
| 02/15/2005 | US6856796 High linearity circuits and methods regarding same |
| 02/15/2005 | US6856215 System and method for adjusting group delay |
| 02/15/2005 | US6856201 Method to reduce unwanted oscillations in high speed, high gain or transimpedance amplifiers |
| 02/15/2005 | US6856200 Protection circuit and method for RF power amplifiers in WLAN tranceivers |
| 02/15/2005 | US6856196 Distortion compensator |
| 02/15/2005 | US6856195 Preamplifier system with selectable input impedance |
| 02/15/2005 | US6856194 Center of gravity compensation of Class-D amplifier |
| 02/15/2005 | US6856190 Leak current compensating device and leak current compensating method |
| 02/15/2005 | US6856188 Current source/sink with high output impedance using bipolar transistors |
| 02/10/2005 | WO2005013477A2 Power distribution and biasing in rf switch-mode power amplifiers |
| 02/10/2005 | WO2005013029A1 A control circuit for diode based rf circuits |
| 02/10/2005 | WO2004047351A3 Radio frequency power amplifier adaptive bias control circuit |
| 02/10/2005 | US20050032485 Scanning receiver for use in power amplifier linearization |
| 02/10/2005 | US20050030773 Voltage-current converter with adjustable quiescent current |
| 02/10/2005 | US20050030106 Output overvoltage protection circuit for power amplifier |
| 02/10/2005 | US20050030105 Temperature-insensitive bias circuit for high-power amplifiers |
| 02/10/2005 | US20050030104 Power amplifier |
| 02/10/2005 | US20050030098 Distributed circular geometry power amplifier architecture |
| 02/10/2005 | US20050030096 Balanced variable gain amplifier capable of achieving performance by low source voltage |
| 02/10/2005 | US20050030094 Low power consumption adaptive power amplifier |
| 02/09/2005 | EP1505738A1 Transmitter |
| 02/09/2005 | EP1505725A1 Power amplifier |
| 02/09/2005 | EP1505723A1 Hybrid distortion compensation method and hybrid distortion compensation device |
| 02/09/2005 | EP1504525A2 Method for producing a transmission signal |
| 02/09/2005 | EP1175725B1 Adaptive linearizer for rf power amplifiers |
| 02/09/2005 | CN1579046A Power amplifier |
| 02/09/2005 | CN1578284A Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics |
| 02/09/2005 | CN1578127A High frequency power amplifier circuit, high frequency power amplifier electronic component and method thereof |
| 02/09/2005 | CN1578126A BTL amplifying system |
| 02/09/2005 | CN1578121A High frequency power amplifier circuit and radio communication system |
| 02/09/2005 | CN1578119A Non-linear compensation circuit, transmission apparatus and non-linear compensation method |
| 02/09/2005 | CN1578118A Pre-distortion cross-cancellation for linearizing power amplifiers |
| 02/09/2005 | CN1578117A 信号输出电路 Signal output circuit |
| 02/09/2005 | CN1578114A Modulation circuit device, modulation method and radio communication device |
| 02/09/2005 | CN1188946C Circuit and method for linearizing amplitude modulation in power amplifier |
| 02/09/2005 | CN1188945C Calibrating apparatus and method for amplifier |
| 02/08/2005 | US6853250 Amplifier power control circuit |
| 02/08/2005 | US6853248 Methods and apparatus for substantially reducing nonlinear distortion using multiple nonlinear devices |
| 02/08/2005 | US6853247 Methods and apparatus for using Taylor series expansion concepts to substantially reduce nonlinear distortion |
| 02/08/2005 | US6853246 Adaptive predistortion system and a method of adaptively predistorting a signal |
| 02/08/2005 | US6853245 Doherty amplifier |
| 02/08/2005 | US6853244 Multi-mode multi-amplifier architecture |
| 02/08/2005 | US6853243 Wireless communication frequency signal amplification apparatus and transmitting and receiving apparatus |
| 02/08/2005 | US6853242 Power supply based audio compression for digital audio amplifier |
| 02/08/2005 | US6853237 Temperature-coefficient-generating circuit and temperature-compensating circuit using the same |
| 02/08/2005 | US6853236 Circuit apparatus operable under high voltage |
| 02/08/2005 | US6853235 High frequency switch, amplifying circuit, and mobile communication terminal |
| 02/08/2005 | US6853213 Input/output circuit, reference-voltage generating circuit, and semiconductor integrated circuit |
| 02/08/2005 | US6852580 Method of fabricating semiconductor device |
| 02/08/2005 | CA2437443A1 Dynamically tuned amplifier for frequency shift keyed signals |
| 02/08/2005 | CA2315583C Alternating gain and phase control system and method |
| 02/03/2005 | WO2005011109A1 Amplifier apparatus |
| 02/03/2005 | WO2005011108A2 Low-power high-psrr current-mode microphone pre-amplifier system and method |
| 02/03/2005 | WO2005011107A1 Pre-distortion distortion compensation amplifying apparatus |
| 02/03/2005 | WO2005011106A2 A low-power wide dynamic range envelope detector system and method |
| 02/03/2005 | WO2005011104A2 Low-consumption voltage amplifier |
| 02/03/2005 | WO2005010780A2 Symbolic analysis of electrical circuits for application in telecommunications |
| 02/03/2005 | WO2004107566A9 Temperature and process compensation of mosfet operating in sub-threshold mode |
| 02/03/2005 | WO2004102789A3 Wideband constant-gain voltage amplifier |
| 02/03/2005 | US20050027491 Symbolic analysis of electrical circuits for application in telecommunications |
| 02/03/2005 | US20050026574 Pre-distortion cross-cancellation for linearizing power amplifiers |
| 02/03/2005 | US20050026322 Ideal operational amplifier layout techniques for reducing package stress and configurations therefor |
| 02/03/2005 | US20050025323 Multi-channel power amplifier with channels independently self-configuring to a bridge or single-ended output, particularly for audio applications |
| 02/03/2005 | US20050025322 Pop and click reduction using DAC power up and power down processing |
| 02/03/2005 | US20050024150 Monolithic amplifier with high-value, monolithically formed passive feedback resistor |
| 02/03/2005 | US20050024148 Bias circuit for smart power amplifier |
| 02/03/2005 | US20050024147 Power distribution and biasing in RF switch-mode power amplifiers |
| 02/03/2005 | US20050024145 Fast settling power amplifier regulator |
| 02/03/2005 | US20050024143 Analog electronic device |
| 02/03/2005 | US20050024141 Signal output circuit |
| 02/03/2005 | US20050024139 Multi-channel power amplifier self-configuring to a bridge or single-ended output, particularly for audio applications |