Patents
Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008)
01/1996
01/11/1996WO1995030272A3 Negative-resistance-compensated microwave buffer
01/11/1996DE4421369C1 Power amplifier control circuit
01/10/1996EP0691752A1 Transformerless hybrid circuit having direct powered line-side amplifiers
01/10/1996EP0691742A2 Optical receiver with a high impedance preamplifier
01/10/1996EP0691734A1 Amplifier circuit for high frequency signals
01/10/1996CN1114798A Various series bridge linkage circuits and electric source filter circuit of Hi-End electron tube amplifier
01/09/1996US5483200 Light-receiving and amplifying device capable of switching between gain levels at high speed and obtaining a sufficient signal-to-noise ratio over a wide range in quantity of incident light
01/09/1996US5483199 Method and apparatus for compensating thermal time constants in an electronic amplifier
01/09/1996US5483197 Power amplifier circuit for audio signal and audio device using the same
01/09/1996US5483196 Amplifier architecture and application thereof to a band-gap voltage generator
01/09/1996US5483195 Second generation low noise microwave voltage controlled oscillator
01/09/1996US5483194 Differential current mode amplifier device
01/09/1996US5483191 Apparatus for biasing a FET with a single voltage supply
01/09/1996US5483183 Bipolar current sense amplifier
01/03/1996EP0690568A1 Frequency translated filter
01/03/1996EP0690565A1 Common mode error correction for differential amplifiers
01/03/1996EP0690564A1 Method and apparatus for sensing common mode error
01/03/1996EP0690563A2 Output circuit having at least one external transistor
01/03/1996EP0690562A1 Transconductor circuit with high-linearity differential input and active filter thereof
01/03/1996EP0690561A1 Method for erasing a common mode current signal and transconductor assembly using such method
01/03/1996EP0690560A1 Modulator having encoder for fault-adaptive pulse step modulator
01/02/1996US5481500 Precharged bit decoder and sense amplifier with integrated latch usable in pipelined memories
01/02/1996US5481224 Differential amplifier circuit having a driver with square-law characteristic
01/02/1996US5481223 Bi-directional spatial power combiner grid amplifier
01/02/1996US5481217 High current test signal converter circuit
01/02/1996US5481213 Cross-conduction prevention circuit for power amplifier output stage
01/02/1996US5481180 PTAT current source
01/02/1996US5481129 Laser trimmed resistor, controlled hydrogen concentration in silicon nitride layer
01/02/1996US5481104 Photodetector circuit with actively damped tuned input
12/1995
12/31/1995CA2149682A1 Micro-miniature radio receiver
12/30/1995CA2151417A1 Modulator having encoder for fault-adaptive pulse step modulator
12/28/1995WO1995035595A2 Differential amplifier with common-mode rejection for low supply voltages
12/28/1995WO1995035563A2 Arrangement comprising a magnetic write head, and write amplifier with capacitive current compensation
12/27/1995EP0689286A1 Low voltage, switched capacitance circuit employing switched operational amplifiers with maximized voltage swing
12/27/1995EP0689284A2 Low supply voltage output driver
12/27/1995EP0689283A1 Tunable oscillator arrangement
12/27/1995EP0689060A1 Audio amplifier switching noise measuring method and device
12/27/1995CN1114117A Method and arrangement for controlling the operation of a high-frequency power amplifier
12/26/1995US5479337 Very low power loss amplifier for analog signals utilizing constant-frequency zero-voltage-switching multi-resonant converter
12/26/1995US5479135 Method of ultra-high frequency current amplification using MOSFET devices
12/26/1995US5479134 Power amplifier circuit for audio signal and audio device using the same
12/26/1995US5479133 Ultra high gain amplifier
12/26/1995US5479045 Semiconductor circuit device capable of reducing influence of a parasitic capacitor
12/26/1995US5479044 Semiconductor circuit device capable of reducing influence of a parasitic capacitor
12/26/1995US5477735 Two-wire constant current powered transducer
12/21/1995WO1995034953A1 Tuned amplifier
12/21/1995DE4420876A1 Signal recording circuitry for magnetic carrier
12/20/1995EP0688097A2 Operational amplifiers and current detector circuits
12/20/1995EP0688096A1 Integrated circuit
12/20/1995EP0687967A1 Temperature stable current source
12/20/1995EP0687397A1 Electric power amplifier and process for its operation
12/19/1995US5477370 Push-pull optical receiver having gain control
12/19/1995US5477192 Amplifier suitable for use in a radiotelephone
12/19/1995US5477191 Variable gain amplifier
12/19/1995US5477190 Low voltage linear output buffer operational amplifier
12/19/1995US5477189 Operational amplifier with high slew rate
12/19/1995US5477188 Linear RF power amplifier
12/19/1995US5477186 Chopper type differential amplifier using MOS gate capacitors
12/19/1995US5477170 Comparator capable of preventing large noise voltage
12/19/1995CA2048561C High frequency power amplifier with high efficiency and low distortion
12/14/1995WO1995034129A1 Rail-to-rail gain stage of an amplifier
12/13/1995EP0687061A1 An improved transimpedance amplifier circuit for use in an optical receiver
12/13/1995EP0687060A2 Power amplifier
12/13/1995EP0686307A1 Refractory metal contact for a power device
12/12/1995US5475343 For a differential amplifier input stage
12/12/1995US5475339 Op amp with rail to rail output swing and employing an improved current mirror circuit
12/12/1995US5475338 Active filter circuit of a capacity ground type
12/12/1995US5475337 Switched capacitor amplifier circuit
12/12/1995US5475256 Opto-electronic integrated circuit
12/12/1995CA2069513C Linear transmitter training method and apparatus
12/07/1995WO1995033305A1 Pulse width modulation amplifier
12/07/1995DE4419318A1 HF single-pole throw switch e.g. for switching satellite signals to receiver
12/07/1995CA2147670A1 An improved transimpedance amplifier circuit for use in an optical receiver
12/06/1995EP0685933A1 Differential amplifier
12/06/1995EP0685932A1 Amplifier with transistorised multiple stages in cascade and adjustable output power
12/06/1995EP0685126A1 Cmos operational amplifier with improved rail-to-rail performance.
12/06/1995EP0685125A1 Cross-conduction prevention circuit for power amplifier output stage
12/06/1995CN2214715Y Electron tube positive grid voltage audiofrequency power amplifier
12/06/1995CN1113049A Class AB push-pull drive circuit, drive method therefor and class AB electronic circuit using the same
12/05/1995US5473461 Wide dynamic range optical receiver
12/05/1995US5473281 Amplifier circuit having impedance matching circuit
12/05/1995CA2050680C Push-pull optical receiver
11/1995
11/30/1995WO1995032548A1 Current mode circuits
11/30/1995WO1995032547A1 Impedance circuit for a miniature hearing aid
11/29/1995EP0684698A1 Class AB output amplifier stage
11/29/1995EP0684537A1 A multiple output current mirror
11/29/1995EP0683950A1 Efficient amplitude/phase modulation amplifier
11/29/1995CN1112748A A continuous time common mode feedback amplifier
11/28/1995US5471665 Differential DC offset compensation circuit
11/28/1995US5471656 Communication apparatus utilizing high power amplifier
11/28/1995US5471175 Input protection circuit for a CMOS comparator
11/28/1995US5471174 Amplifier having an output stage with bias current cancellation
11/28/1995US5471173 Cascaded amplifier having temperature compensation
11/28/1995US5471172 "AB Cascode" amplifier in an input stage of an amplifier or comparator
11/28/1995US5471170 Current-mode amplification system, and corresponding operational amplifier, gain section and amplification element
11/28/1995US5471132 Logarithmic and exponential converter circuits
11/28/1995US5471131 Analog-to-digital converter and reference voltage circuitry
11/23/1995WO1995031858A1 High-frequency amplifier
11/23/1995WO1995031854A1 All mos voltage to current converter
11/22/1995EP0683562A1 Radio-frequency power amplifier