| 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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| 03/21/2000 | US6040741 Preamplifier for amplifying signal voltages from a signal source with high source impedance |
| 03/21/2000 | US6040740 Audio transient suppression device |
| 03/21/2000 | US6040737 Output buffer circuit and method that compensate for operating conditions and manufacturing processes |
| 03/16/2000 | WO2000014887A1 Electronic circuit for correcting cross modulation distortion |
| 03/16/2000 | WO2000014869A1 Carrier reutilization for synchronous detection |
| 03/16/2000 | WO2000014868A1 Rf power amplifier with variable bias current |
| 03/16/2000 | WO2000002307B1 Semiconductor amplifier circuit and system |
| 03/16/2000 | CA2312834A1 Carrier reutilization for synchronous detection |
| 03/15/2000 | EP0986171A1 Transmitting apparatus and transmitting method |
| 03/15/2000 | EP0986169A2 Calibration system for feed forward distortion reduction system |
| 03/15/2000 | EP0986168A2 Pilotless feed forward distortion reduction system |
| 03/14/2000 | US6037837 Feed forward amplifier |
| 03/09/2000 | WO2000013317A1 Dc output level compensation circuit |
| 03/09/2000 | WO2000013309A1 Differential amplifier with gain linearization through transconductance compensation |
| 03/09/2000 | WO2000013308A1 Linear and multi-sinh transconductance circuits |
| 03/09/2000 | DE19919945A1 Magnetoresistivkopfleseverstärker Magnetoresistivkopfleseverstärker |
| 03/08/2000 | EP0984554A2 Feed forward amplifier improvement incorporating an automatic gain and phase controller |
| 03/08/2000 | EP0983631A1 Power amplifier and method therein |
| 03/08/2000 | EP0799459A4 Electro-optical sensor |
| 03/08/2000 | CN1246774A Device for receiving and transmitting carrier band signal for radio base station |
| 03/07/2000 | US6034854 Semiconductor integrated circuit having input protection circuit |
| 03/07/2000 | US6034568 Broadband dc amplifier technique with very low offset voltage |
| 03/07/2000 | US6034537 Driver circuits |
| 03/02/2000 | WO2000011816A1 In-line predistorter for linearization of electronic and optical signals |
| 03/02/2000 | WO2000011781A1 Methods for adjusting audio signals responsive to changes in a power supply level and related communications devices |
| 03/02/2000 | WO2000011780A1 Transimpedance amplifier with automatic gain control |
| 03/02/2000 | WO2000011779A1 Circuit for precise sensing and regulation of quiescent dc current in transistor power amplifiers |
| 03/01/2000 | EP0982880A2 Optical transmitter having temperature compensating function and optical transmission system |
| 03/01/2000 | EP0982852A2 Power amplifier having monitoring and circuit protection |
| 03/01/2000 | EP0982851A1 A linear amplifier arrangement |
| 03/01/2000 | EP0982850A1 Method and apparatus for adjusting pilot signal relative to input signal |
| 03/01/2000 | EP0982849A1 Predistorter |
| 03/01/2000 | EP0981854A1 Frequency selective predistortion in a linear transmitter |
| 03/01/2000 | EP0981819A2 Optical read/write apparatus |
| 03/01/2000 | CN1246220A Intermodulation compensation in multi-channel amplifiers |
| 03/01/2000 | CN1246002A Optical transmitter with temperature-compensation function and optical transmission system |
| 02/29/2000 | US6031420 Operational amplifier arrangement |
| 02/29/2000 | US6031417 Differential amplifier for multiple supply voltages and biasing device therefore |
| 02/29/2000 | US6031404 Analog-signal to square-wave-signal reshaping system with offset compensation |
| 02/29/2000 | US6029285 Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude |
| 02/27/2000 | CA2281317A1 A linear amplifier arrangement |
| 02/24/2000 | WO2000010247A1 Error correction in amplifiers |
| 02/24/2000 | DE19833968A1 Integrated controller arrangement e.g. for directly controlled elements or systems |
| 02/23/2000 | EP0980613A1 Method and apparatus for linear transmission by direct inverse modeling |
| 02/23/2000 | CN1049776C Amplifier with constant current and constant voltage feeding |
| 02/22/2000 | US6028487 Negative-feedback amplifier circuit capable of independently controlling a gain and an impedance |
| 02/22/2000 | US6028486 Method and apparatus for reducing power dissipation in multi-carrier amplifiers |
| 02/22/2000 | US6028485 Power amplification apparatus and method therefor |
| 02/22/2000 | US6028480 Amplifier with active-bootstrapped gain-enhancement technique |
| 02/22/2000 | US6028478 Converter circuit and variable gain amplifier with temperature compensation |
| 02/22/2000 | US6028477 Adaptive biasing in a power amplifier |
| 02/22/2000 | US6028469 Electric circuit arrangement comprising a switchable feedback branch |
| 02/22/2000 | US6028458 Differential amplifier with input signal determined standby state |
| 02/20/2000 | CA2275842A1 Method and apparatus for adjusting pilot signal relative to input signal |
| 02/17/2000 | WO2000008870A2 Apparatus and method of linearizing a power amplifier in a mobile radio communication system |
| 02/17/2000 | WO2000008774A1 Orthogonal signal transmitter |
| 02/17/2000 | WO2000008773A2 Radio devices including power amplifier control circuits with hardware lockouts |
| 02/17/2000 | WO2000008750A1 A method and apparatus for increasing the linearity of the phase and gain of a power amplifier circuit |
| 02/17/2000 | WO2000008749A1 Apparatus and method of achieving and improving linearity of amplifiers and other non-linear paths |
| 02/17/2000 | WO2000008748A1 Power amplification apparatus and method therefor |
| 02/16/2000 | EP0980137A1 Synchronous pilot detection technique for a control system that reduces distortion produced by electrical circuits |
| 02/16/2000 | EP0979559A1 Amplifier module with two power amplifiers for dual band cellular phones |
| 02/16/2000 | EP0979551A1 Method and apparatus for efficient signal power amplification |
| 02/16/2000 | CN1049511C Frequency compensated circuit |
| 02/15/2000 | US6026285 Intermodulation distortion reduction circuit utilizing variable attenuation |
| 02/15/2000 | US6025754 Envelope modulated amplifier bias control and method |
| 02/15/2000 | US6025753 Method and apparatus for amplifying a signal |
| 02/15/2000 | US6025752 Inverting amplifying circuit |
| 02/15/2000 | US6025614 Amplifier semiconductor element, method for fabricating the same, and amplifier semiconductor device |
| 02/12/2000 | CA2275910A1 Synchronous pilot detection technique for a control system that reduces distortion produced by electrical circuits |
| 02/10/2000 | WO2000007294A1 Power amplifier with variable input voltage source |
| 02/10/2000 | WO2000007293A1 A set-up method for a linearising circuit |
| 02/10/2000 | WO2000007292A1 Amplifier output stage |
| 02/10/2000 | WO2000007291A2 A method of attenuating zero crossing distortion and noise in an amplifier, an amplifier and uses of the method and the amplifier |
| 02/09/2000 | EP0978163A1 Battery life extending technique for mobile wireless applications |
| 02/08/2000 | US6023612 Modular transmission system and method |
| 02/08/2000 | US6023363 Optical transmission apparatus |
| 02/08/2000 | US6023362 Optical transmitter having pre-modulation amplification |
| 02/08/2000 | US6023197 Amplifier suitable for cable-network applications |
| 02/08/2000 | US6023196 Bias circuit for transconductance amplifier |
| 02/08/2000 | US6023194 Amplifier with reduced input capacitance |
| 02/08/2000 | US6023193 High power bridge amplifier |
| 02/08/2000 | US6023189 CMOS circuit for providing a bandcap reference voltage |
| 02/08/2000 | CA2222339C Self-calibration system for logarithmic amplifiers |
| 02/03/2000 | WO2000005818A1 Cmos output amplifier independent of temperature, supply voltage and manufacturing quality of transistors |
| 02/03/2000 | WO2000005808A1 High gain, impedance matching low noise rf amplifier circuit |
| 02/03/2000 | CA2338098A1 High gain, impedance matching low noise rf amplifier circuit |
| 02/02/2000 | EP0977354A1 Amplifier for radio transmission |
| 02/02/2000 | EP0977352A2 Noise figure and linearity improvement technique using shunt feedback |
| 02/02/2000 | CN1243619A Compensation of delay in linearization loop of power amplifier |
| 02/02/2000 | CN1243614A High frequency amplifier and communication receiver or wireless transceiver |
| 02/01/2000 | US6020789 High frequency amplifier, and a communication receiver or transceiver |
| 02/01/2000 | US6020787 Method and apparatus for amplifying a signal |
| 01/27/2000 | WO2000004635A1 Circuit for generating an auxiliary direct current voltage |
| 01/27/2000 | WO2000004634A1 Method and apparatus for compensating for distortion in iq modulators |
| 01/26/2000 | EP0975089A2 Parallel HV mosfet high power stable amplifier |
| 01/26/2000 | EP0974191A1 Method and apparatus for spread spectrum pilot extraction for rf amplifiers |
| 01/26/2000 | EP0974082A1 Output buffer having a predriver for compensating slew rate against process variations |
| 01/26/2000 | CN1242885A Protective circuit |
| 01/26/2000 | CN1048833C Class AB push-pull drive circuit, drive method therefor and class AB electronic circuit using same |