| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 06/24/1999 | WO1999031797A1 Integrated circuit, current mirror circuit, and method of fabricating current mirror circuit |
| 06/24/1999 | WO1999019990A3 Compensation of delay in linearization loop of power amplifier |
| 06/23/1999 | EP0924912A1 Low IMD amplification method and apparatus |
| 06/23/1999 | EP0924889A2 Intermediate amplification device in a transmission network |
| 06/23/1999 | EP0924854A1 Differential circuits for higher integration |
| 06/23/1999 | EP0924590A1 Precision current source |
| 06/23/1999 | EP0923806A2 An amplified mos biasing circuit for avoiding latch-up |
| 06/23/1999 | CN1220784A Hybrid matrix amplifier with noise reduction |
| 06/22/1999 | US5914641 Gate voltage control circuit of a power amplifier |
| 06/22/1999 | US5914639 Amplifier with common base input stage |
| 06/22/1999 | US5914638 Method and apparatus for adjusting the common-mode output voltage of a sample-and-hold amplifier |
| 06/22/1999 | US5914637 Gain-variable amplifier with wide control range |
| 06/22/1999 | US5914636 Balanced power audio amplification system |
| 06/22/1999 | US5914634 Multiple switchable input LNA with input impedance control |
| 06/22/1999 | US5914630 MR head preamplifier with output signal amplitude which is independent of head resistance |
| 06/22/1999 | US5914526 Semiconductor device |
| 06/22/1999 | CA2191378C Amplifier output stage having enhanced drive capability |
| 06/16/1999 | EP0923194A2 Output signal converter for tube amplifiers |
| 06/16/1999 | CN2324704Y Energy amplifier final-current amplifier |
| 06/16/1999 | CN2324703Y Lower-transient intermodulation distortion audio-frequency amplifier |
| 06/16/1999 | CN1219802A Push-pull wideband semiconductor amplifier |
| 06/16/1999 | CA2224953A1 A low voltage topology for radio frequency integrated circuit design |
| 06/15/1999 | US5913181 Circuit for providing a switch signal to trigger changer in a digital potentiometer |
| 06/15/1999 | US5913173 Radio frequency device |
| 06/15/1999 | US5912590 Broad-band amplifier circuit and high-speed communication element using the same |
| 06/15/1999 | US5912589 Arrangement for stabilizing the gain bandwidth product |
| 06/15/1999 | US5912585 Vacuum tube audio amplifying circuit |
| 06/15/1999 | US5912584 Analog signal processing device and correlation computing device |
| 06/15/1999 | US5912582 BiCMOS transconductor stage for high-frequency filters |
| 06/15/1999 | US5912463 Photodetector and solid-state imaging apparatus |
| 06/15/1999 | CA2176551C Method and apparatus for amplifying a signal |
| 06/10/1999 | WO1999029037A1 High frequency power amplifying circuit, and mobile communication apparatus using it |
| 06/10/1999 | WO1999028768A2 Optical receiver |
| 06/09/1999 | EP0921635A1 Power amplifier device |
| 06/09/1999 | EP0921624A1 Device for driving self arc-extinguishing type power element |
| 06/09/1999 | CN2323514Y Small high-fidelity power amplifier |
| 06/09/1999 | CN1219302A Alinearizer for linearizing a non-linear component controlled by control voltage |
| 06/09/1999 | CN1219025A Microwave amplifier for reducing pulsating noise |
| 06/09/1999 | CN1219023A Semiconductor circuit having stable gain slope |
| 06/08/1999 | US5910749 Current reference circuit with substantially no temperature dependence |
| 06/08/1999 | US5910748 Power amplifier in bicmos technology having an output stage in MOS technology |
| 06/08/1999 | US5910736 Differential-type data transmitter |
| 06/03/1999 | WO1999027646A1 High-frequency amplifier circuit device and high-frequency transmission system using the same |
| 06/03/1999 | WO1999014854A3 A high frequency amplifier, and a communication receiver or transceiver |
| 06/03/1999 | WO1999011038A8 Line receiver circuit with large common mode range for differential input signals |
| 06/02/1999 | EP0920125A2 Push-pull wideband semiconductor amplifier |
| 06/02/1999 | EP0920122A2 Semiconductor circuit with a stabilized gain slope |
| 06/02/1999 | EP0919082A1 A differential amplifier, an integrated circuit, and a telephone |
| 06/02/1999 | DE19821735A1 Power amplifier with biasing voltage circuit |
| 06/01/1999 | US5909643 Transmitter power varying device having a bypass line for a power amplifier |
| 06/01/1999 | US5909153 Method and apparatus for compensating for delays in modulator loops |
| 06/01/1999 | US5909147 Amplifier having DC coupled gain stages |
| 06/01/1999 | US5909146 Operational amplifier having rail to rail input/output ability |
| 06/01/1999 | US5909137 Voltage adder/subtractor circuit with two differential transistor pairs |
| 06/01/1999 | US5909136 Quarter-square multiplier based on the dynamic bias current technique |
| 06/01/1999 | US5909024 Integrated system for reading magnetic information |
| 06/01/1999 | CA2175800C Switch-mode power supply for a bridged linear amplifier |
| 05/27/1999 | WO1999026340A1 Zero-delay slew-rate controlled output buffer |
| 05/27/1999 | DE19751645A1 Intermediate amplifier with signal amplifying stage in transmission network |
| 05/27/1999 | CA2278475A1 Zero-delay slew-rate controlled output buffer |
| 05/26/1999 | EP0917761A2 A gm-C CELL WITH TWO-STAGE COMMON MODE CONTROL AND CURRENT BOOST |
| 05/26/1999 | CN2321166Y High-reliability power amplifier |
| 05/26/1999 | CN1217864A High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 05/26/1999 | CN1217607A High-gain amplifier having limited out-put dynamic range |
| 05/25/1999 | US5907300 A/D conversion device with dynamic input control |
| 05/25/1999 | US5907262 Folded-cascode amplifier stage |
| 05/25/1999 | US5907260 Differential amplifying circuit |
| 05/25/1999 | US5907259 Operational amplification circuit capable of driving a high load |
| 05/25/1999 | US5907242 Balanced passive bandpass filter and preamplifier for a receiver |
| 05/21/1999 | CA2251979A1 Intermediate amplifier device for a transmission network |
| 05/20/1999 | DE19814832A1 Quarz controlled loudspeaker amplifier system |
| 05/19/1999 | EP0917285A1 Low-voltage amplifiers |
| 05/19/1999 | EP0917284A2 Differential amplifier and a method of compensation |
| 05/19/1999 | EP0916183A1 Improved transimpedance amplifier |
| 05/19/1999 | EP0916182A1 High-gain common-emitter output stage |
| 05/19/1999 | EP0916181A1 Voltage to current converter for high frequency applications |
| 05/19/1999 | CN1216879A Device for converting symmetrical signal into asymmerical signal |
| 05/18/1999 | US5905760 Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type |
| 05/18/1999 | US5905617 Differential amplifier having a protection circuit |
| 05/18/1999 | US5905409 Microwave and millimeter wave circuit including amplifier and band elimination filters |
| 05/18/1999 | US5905408 Amplifier and a method for detecting the presence of a load |
| 05/18/1999 | US5905390 Inductive load drive circuit |
| 05/18/1999 | US5905256 Imaging device including output amplifier circuit having variable GAIN BANDWIDTH PRODUCT |
| 05/14/1999 | WO1999023755A1 A linear rf power amplifier with optically activated switches |
| 05/14/1999 | WO1999003197B1 A high speed and high gain operational amplifier |
| 05/14/1999 | EP0940006A4 Method and apparatus for routing signals through a cable television signal distribution amplifier |
| 05/12/1999 | EP0915565A2 Filter circuit |
| 05/12/1999 | EP0915562A2 MOS transistor differential amplifier |
| 05/12/1999 | EP0914728A1 Arrangements and methods for generating a radio frequency signal |
| 05/12/1999 | EP0914711A1 Power amplifier |
| 05/12/1999 | EP0832515B1 A low-voltage rail-to-rail operational amplifier |
| 05/12/1999 | EP0755587B1 Fixed and adjustable bandwidth translinear input amplifier |
| 05/11/1999 | US5903854 High-frequency amplifier, transmitting device and receiving device |
| 05/11/1999 | US5903193 Amplifying device and transmission output control apparatus |
| 05/11/1999 | US5903190 Amplifier feedforward arrangement and method for enhanced frequency response |
| 05/11/1999 | US5903189 High gain low distortion bridge amplifier with feedback |
| 05/11/1999 | US5903188 Modulator having improved discharging unwanted capacitance |
| 05/11/1999 | US5903185 Hybrid differential pairs for flat transconductance |
| 05/11/1999 | US5903178 Semiconductor integrated circuit |
| 05/06/1999 | WO1999022445A1 Differential voltage-to-current converter |