| 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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| 10/05/2004 | US6801784 Continuous closed-loop power control system including modulation injection in a wireless transceiver power amplifier |
| 10/05/2004 | US6801760 Control of receiver immunity to interference by controlling linearity |
| 10/05/2004 | US6801757 Circuit configuration for matching an amplifier to a radio-frequency line, and use of the circuit configuration |
| 10/05/2004 | US6801582 Apparatus and method for improving an output signal from a nonlinear device through dynamic signal pre-distortion based upon Lagrange interpolation |
| 10/05/2004 | US6801102 Tunable filters having variable bandwidth and variable delay |
| 10/05/2004 | US6801089 Continuous variable-gain low-noise amplifier |
| 10/05/2004 | US6801088 Dual gate low noise amplifier |
| 10/05/2004 | US6801087 Integrated circuit with an analog amplifier |
| 10/05/2004 | US6801086 Adaptive digital pre-distortion using amplifier model that incorporates frequency-dependent non-linearities |
| 10/05/2004 | US6801083 Feedforward amplifier |
| 10/05/2004 | US6801082 Power amplifier circuit and method using bandlimited signal component estimates |
| 10/05/2004 | US6801058 Circuit and method for over-current sensing and control |
| 10/05/2004 | US6800920 RF passive circuit and RF amplifier with via-holes |
| 09/30/2004 | WO2004084404A1 Circuit arrangement and transistor control method |
| 09/30/2004 | WO2004056061A3 Adaptive controller for linearization of transmitter |
| 09/30/2004 | WO2004049555B1 Radio frequency power amplifier active self-bias compensation circuit |
| 09/30/2004 | US20040192408 Battery life extending technique for mobile wireless applications using bias level control |
| 09/30/2004 | US20040192237 Feedforward amplifier and radio communication apparatus with the amplifier |
| 09/30/2004 | US20040192233 Redundant linear power amplifier system |
| 09/30/2004 | US20040192190 Low noise block down converter with reduced power consumption |
| 09/30/2004 | US20040189401 Output circuit |
| 09/30/2004 | US20040189399 Bias circuit for a radio frequency power amplifier |
| 09/30/2004 | US20040189398 Bias circuit for providing a constant bias current to a power amplifier |
| 09/30/2004 | US20040189395 Apparatus, methods and articles of manufacture for processing an electromagnetic wave |
| 09/30/2004 | US20040189394 Power amplifier |
| 09/30/2004 | US20040189389 Operational amplifier having large output current with low supply voltage |
| 09/30/2004 | US20040189388 Variable transconductance variable gain amplifier utilizing a degenerated differential pair |
| 09/30/2004 | US20040189384 Feed forward amplifying circuit |
| 09/30/2004 | US20040189381 High efficiency amplifier and method of designing same |
| 09/30/2004 | US20040189380 High efficiency amplifier |
| 09/30/2004 | US20040189379 Power amplification circuit and communication device using the same |
| 09/30/2004 | US20040189378 High-efficiency linear power amplifier |
| 09/30/2004 | US20040189377 PWM digital amplifier with high-order loop filter |
| 09/30/2004 | US20040189350 Semiconductor device including a differential transistor pair |
| 09/30/2004 | US20040188761 Source follower circuit or bootstrap circuit, driver circuit comprising such circuit, and display device comprising such driver circuit |
| 09/29/2004 | EP1463198A2 High-efficiency linear power amplifier |
| 09/29/2004 | EP1463197A1 A device and method for measuring dependency of output power and for generating a ramp signal for a power amplifier |
| 09/29/2004 | EP1461859A2 Power amplifier |
| 09/29/2004 | EP1352467B1 Low noise fully differential amplifier |
| 09/29/2004 | EP1195004B1 Voltage limiting bias circuit for reduction of hot electron degradation effects in mos cascode circuits |
| 09/29/2004 | EP0916182A4 High-gain common-emitter output stage |
| 09/29/2004 | CN1533028A High efficiency linear power amplifier |
| 09/29/2004 | CN1533027A Suppression circuit of high speed high frequency operation |
| 09/29/2004 | CN1169309C Adaptive pre-distortion transmitter |
| 09/29/2004 | CN1169289C Level shift circuit |
| 09/29/2004 | CN1169287C High efficiency amplifier having amplifying device and radio communication device |
| 09/28/2004 | US6799027 Amplifier circuit |
| 09/28/2004 | US6799020 Parallel amplifier architecture using digital phase control techniques |
| 09/28/2004 | US6798843 Wideband digital predistortion linearizer for nonlinear amplifiers |
| 09/28/2004 | US6798292 Highly linear low voltage rail-to-rail input/output operational amplifier |
| 09/28/2004 | US6798285 Amplifier improvements |
| 09/28/2004 | US6798284 Variable-impedance reference circuit and varying method |
| 09/28/2004 | US6798282 Method and system for transimpedance amplifiers with high current input while maintaining high transimpedance gain and bandwidth |
| 09/28/2004 | US6798281 Two-input/two-output broadband active selector switch with distributed structure, and phase control device comprising such a switch |
| 09/28/2004 | US6798273 Linear power conversion circuit |
| 09/28/2004 | US6798268 Single-ended differential circuit using complementary devices |
| 09/28/2004 | CA2286536C Multichannel amplification system using mask detection |
| 09/23/2004 | WO2004082322A2 Apparatus and method of limiting power applied to a loudspeaker |
| 09/23/2004 | WO2004082321A2 Multi-channel digital feedback reducer system |
| 09/23/2004 | WO2004062088A3 Power amplifier circuit and method using bandlimited signal component estimates |
| 09/23/2004 | US20040186602 Multi-chip PWM synchronization and communication |
| 09/23/2004 | US20040185809 Method for adjusting the amplification of a high frequency signal |
| 09/23/2004 | US20040185805 LINC power transmitter |
| 09/23/2004 | US20040185803 Transmission circuit |
| 09/23/2004 | US20040184627 Systems and methods for protection of audio amplifier circuits |
| 09/23/2004 | US20040184621 Clip detection in PWM amplifier |
| 09/23/2004 | US20040184572 Output stage synchronization |
| 09/23/2004 | US20040184387 Photoreceptive amplifier circuit and optical pickup element including the same |
| 09/23/2004 | US20040183715 Current source modulator |
| 09/23/2004 | US20040183628 Negative resistance circuit |
| 09/23/2004 | US20040183599 Variable impedance circuit, variable gain differential amplifier, multiplier, high-frequency circuit and differential distributed amplifier |
| 09/23/2004 | US20040183598 Method for transconductance linearization for DC-coupled applications |
| 09/23/2004 | US20040183596 Communication system and arrangements comprising such a communication system |
| 09/23/2004 | US20040183594 Gain control of a power amplifier |
| 09/23/2004 | US20040183593 Power amplification apparatus of portable terminal |
| 09/23/2004 | US20040183592 Feedback network and amplifier and/or converter circuit with a feedback network |
| 09/23/2004 | US20040183591 Amplifier modulation |
| 09/23/2004 | DE10306052A1 High frequency amplifier with working point adjustment circuit has low pass filter connected between control connections of main transistor and of auxiliary transistor for working point adjustment |
| 09/23/2004 | DE102004010697A1 Verstärkersteuerungssystem mit statischer Verbesserung der Auflösung von digitalen Steuerungssignalen Amplifier control system with static improving the resolution of digital control signals |
| 09/23/2004 | DE10054540B4 Verstärkerschaltung, insbesondere Leitungstreiber und Verfahren zur Verstärkung eines Signals, insbesondere Verfahren zum Treiben eines Leitungssignals Amplifier circuit, in particular line driver and method for amplifying a signal, in particular to methods of driving a line signal |
| 09/22/2004 | EP1459442A2 Integrated circuit with an amplifier |
| 09/22/2004 | EP1459440A1 Esd protection circuit for use in rf cmos ic design |
| 09/22/2004 | EP1459439A1 Amplifier with bias compensation using a current mirror circuit |
| 09/22/2004 | EP1260017B1 Method and transmission circuit for producing a transmission signal |
| 09/22/2004 | EP1252709B1 Method and system for compensating non-linearities and time-varying changes of a transfer function acting on an input signal |
| 09/22/2004 | CN2643547Y 数字功率放大器 Digital Power Amplifier |
| 09/22/2004 | CN1531782A Control of receiver immunity to interference by controlling linearity |
| 09/22/2004 | CN1531776A Circuit for linearizing electronic devices |
| 09/22/2004 | CN1531775A Multistage amplifier and integrated circuit |
| 09/22/2004 | CN1531213A Signal sampler acquring technology |
| 09/22/2004 | CN1531195A Enlarger controlling system for counting improvement of digital controlling signal resolution ratio |
| 09/22/2004 | CN1531194A Semiconductor devices |
| 09/22/2004 | CN1531192A Offset current supplying circuit and amplifying circuit |
| 09/22/2004 | CN1168204C Dynamially synchronous voltage-biased power amplifier |
| 09/22/2004 | CN1168203C Self-adaptive distortion compensation arrangement |
| 09/22/2004 | CN1168202C Adaptive linear power amplifier and its adaptive method |
| 09/22/2004 | CN1168201C Method and device in telecommunication system |
| 09/21/2004 | US6795785 Testing linearity of methods of chemical analysis |
| 09/21/2004 | US6795712 System for allowing a TDMA/CDMA portable transceiver to operate with closed loop power control |
| 09/21/2004 | US6794939 Signal predistortion using a combination of multiple predistortion techniques |