| 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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| 08/14/1991 | EP0441110A1 A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter |
| 08/14/1991 | DE4004135A1 Frequenzgangkompensierte schaltung Frequency-response-compensated circuit |
| 08/13/1991 | US5039954 Amplifier arrangement |
| 08/13/1991 | US5039880 Fast sample and hold circuit configuration |
| 08/08/1991 | WO1991011803A1 Head amplifier |
| 08/08/1991 | DE4003301A1 Suppression of electromagnetic interference - using chopper amplifier with integrated intermodulation suppression |
| 08/07/1991 | EP0307465A4 Semiconductor emulation of tube amplifiers |
| 08/07/1991 | CN1053719A Method of compensating for non-linearities in end amplifier incorporated in radio transmitter |
| 08/06/1991 | US5038113 Nonlinearity generator using FET source-to-drain conductive path |
| 08/06/1991 | US5038054 Protected Darlington transistor arrangement |
| 07/31/1991 | EP0439230A2 Active bypass for inhibiting high-frequency supply voltage variations in integrated circuits |
| 07/31/1991 | EP0438875A2 Linear amplifier with automatic adjustment of feed forward loop gain and phase |
| 07/30/1991 | US5036228 Temperature compensation circuit for negative impedance driving apparatus |
| 07/30/1991 | US5036218 Antisaturation circuit |
| 07/23/1991 | WO1991011053A1 A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter |
| 07/23/1991 | US5034702 Amplifying circuit including a bias circuit for independently determining a drain current and a drain voltage |
| 07/23/1991 | US5034700 Integratable amplifier circuit |
| 07/23/1991 | US5034696 Circuit for the automatic control of the off-load voltage of a load, and differential comparator including this automatic control circuit |
| 07/23/1991 | US5034677 Bias voltage supplying circuit |
| 07/23/1991 | CA1286735C Cascaded internal impedance dependent amplifier with accurate variable gain control |
| 07/23/1991 | CA1286734C Envelope amplifier |
| 07/16/1991 | US5032799 Multistage cascode radio frequency amplifier |
| 07/16/1991 | US5032796 Solid state amplifier simulating vacuum tube distortion characteristics |
| 07/16/1991 | US5031461 Matched pair of sensor and amplifier circuits |
| 07/09/1991 | US5031066 DC isolation and protection system and circuit |
| 07/09/1991 | US5030922 Supply current compensation circuitry |
| 07/09/1991 | US5030198 Adaptive transmission line stage in an analog electronic cochlea |
| 07/09/1991 | CA1286001C Means for reducing damage to jfets from electrostatic discharge events |
| 07/03/1991 | EP0435578A2 Low-distortion radio-frequency amplifying apparatus |
| 07/02/1991 | US5029299 Power amplifier with current limiting means |
| 07/02/1991 | US5029277 Optically compensated bipolar transistor |
| 07/02/1991 | US5028881 Highly linear operational transconductance amplifier with low transconductance |
| 07/02/1991 | US5028815 Clocked comparator with offset reduction |
| 06/27/1991 | DE4026123A1 Multiple earth amplifier circuit - uses additional circuit connected between collector of output transistor and collector load resistor |
| 06/26/1991 | EP0433468A1 Current voltage converter |
| 06/26/1991 | EP0433383A1 Sample-hold amplifier circuit. |
| 06/26/1991 | CN1052573A Lateral pnp transistor using latch voltage of npn transistor |
| 06/25/1991 | US5027428 Power saving arrangement and power saving method |
| 06/25/1991 | US5027082 Solid state RF power amplifier having improved efficiency and reduced distortion |
| 06/25/1991 | US5027081 High gain differential-to-single ended amplifier having a tee network feedback loop |
| 06/25/1991 | CA1285325C Low noise, high speed current or voltage amplifier |
| 06/20/1991 | DE4040070A1 PNP lateral transistor with NPN device - uses breakdown voltage of parallel NPN device to protect against static electrically |
| 06/20/1991 | DE4038217A1 Differential amplifier with multiple differential stages - uses cross connection of inputs with voltage offsets to provide large linear characteristic |
| 06/20/1991 | DE4037219A1 Linear two-stage amplifier - uses operational amplifier and output transistor in conjunction with voltage sources to limit output and provide compensation |
| 06/20/1991 | DE3941677A1 Differential amplifier with multiple differential stages - uses common connection of inputs and outputs to achieve desired characteristics |
| 06/20/1991 | DE3941351A1 Low noise wide band amplifier for video-audio appts. - uses feedback circuits connected to reference potentials to achieve frequency compensation |
| 06/19/1991 | EP0433147A1 Current drift compensating method in a MOS integrated circuit and circuit therefor |
| 06/18/1991 | US5025225 Amplifier having substantially constant D.C. to r.f. conversion efficiency |
| 06/12/1991 | EP0432045A1 Grid tube with better efficiency |
| 06/12/1991 | EP0431201A1 Linear transmitter |
| 06/12/1991 | CN1052230A Transconductance amplifier |
| 06/11/1991 | US5023937 Transmitter with improved linear amplifier control |
| 06/11/1991 | US5023915 Specialized amplifier systems for musical instruments |
| 06/11/1991 | US5023570 Emitter-follower circuit |
| 06/11/1991 | US5023568 Combined current differencing and operational amplifier circuit |
| 06/11/1991 | US5023567 Integrated-circuit |
| 06/11/1991 | US5023565 Linear amplifier with automatic adjustment of feed forward loop gain and phase |
| 06/11/1991 | US5023564 Amplfier circuit |
| 06/11/1991 | US5023478 Complementary emitter follower drivers |
| 06/05/1991 | EP0430577A2 System for driving a load |
| 06/05/1991 | EP0430236A2 Power amplifier |
| 06/05/1991 | EP0429717A1 Transconductance amplifier |
| 06/04/1991 | US5021682 Limiting the power dissipation in a diffused metal oxide semiconductor transistor or DMOST |
| 05/30/1991 | WO1991007817A1 Rf wideband high power amplifier |
| 05/30/1991 | WO1991007815A1 Transducer signal conditioning circuit |
| 05/30/1991 | WO1991007813A1 Improvements in or relating to amplifiers |
| 05/30/1991 | WO1991007812A1 Improvements in or relating to amplifiers |
| 05/29/1991 | EP0275302B1 Correlated sampling amplifier |
| 05/29/1991 | DE3939020A1 HF power transmit stage - has adapting transmitter, increasing output impedance of HF power transmits stage |
| 05/28/1991 | US5019789 Adaptive bias circuit for preventing turnoff in a push-pull stage |
| 05/28/1991 | US5019788 Amplifier with wide dynamic range |
| 05/28/1991 | US5019720 Integrated circuit driver for serial bus having output overvoltage protection |
| 05/23/1991 | CA2030505A1 High efficiency power amplifier |
| 05/21/1991 | US5017888 Broadband nonlinear drive control network for linear amplifiers arranged in several amplifier channels |
| 05/21/1991 | US5017886 RF power combiner using baluns |
| 05/21/1991 | US5017885 Optical amplifier with reduced nonlinearity |
| 05/21/1991 | US5017858 Constant-current regulated power circuit |
| 05/21/1991 | CA1284360C Low noise microwave amplifier having optimal stability, gain, and noise control |
| 05/15/1991 | EP0427557A1 An amplifier circuit |
| 05/15/1991 | EP0427135A2 Circuit for sensing output distortion, in particular of final stages of audio devices |
| 05/15/1991 | EP0427002A2 VHF power amplifier |
| 05/14/1991 | US5015968 Feedback cascode amplifier |
| 05/14/1991 | US5015967 Integratable amplifier circuit |
| 05/14/1991 | US5015965 Predistortion equalizer with resistive combiners and dividers |
| 05/14/1991 | CA1284189C Amplifier circuit including single capacitor for dc differential-input balance |
| 05/08/1991 | EP0426598A2 A transistor amplifier having variable bias circuits |
| 05/08/1991 | EP0426594A2 A temperature compensated feedback circuit for setting and stabilizing amplifier DC bias points |
| 05/08/1991 | EP0426120A2 Amplification circuit with improved linearity |
| 05/08/1991 | EP0425878A2 High-efficiency audio amplifier |
| 05/07/1991 | US5014020 Amplifier for outputting motor controlling signal in motor controlling circuit |
| 05/07/1991 | US5014017 Power-saving low-frequency power amplifier |
| 05/02/1991 | WO1991006149A1 Stabilizing circuit for feedback rf amplifier |
| 05/02/1991 | EP0425097A2 Frequency hopping receiver comprising amplifier with switchable time-constant |
| 05/02/1991 | EP0424394A1 Means for reducing damage to jfets from electrostatic discharge events. |
| 04/30/1991 | US5012436 Sensor arrangement with amplifier offset cancellation |
| 04/30/1991 | US5012200 Method and system for the linear amplification of signals |
| 04/30/1991 | US5012134 DC bootstrapped unity gain buffer |
| 04/24/1991 | EP0423666A1 Digital non-linearity correction method for a transmission chain, and device for carrying out the method |
| 04/23/1991 | CA1283463C Switchable mode amplifier for wide dynamic range |
| 04/18/1991 | DE3933805A1 Hf amplifier circuit with negative feedback operational amplifier - with output coupled to auxiliary amplifier input, whose output is also coupled to operational amplifier output |