Patents
Sitemap › H03 - Basic electronic circuitry › H03F - Amplifiers › H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008)
08/1991
08/08/1991WO1991011803A1 Head amplifier
08/07/1991WO1991012659A1 Drain biasing circuit for high power field effect transistors (fet), with hyperfrequencies and internally adapted
08/07/1991CA2050578A1 Internally matched microwave high power field effect transistor (fet) drain bias circuit
08/06/1991US5038114 Current amplifier
07/1991
07/30/1991CA1287129C High gain miniature cross-field amplifier
07/25/1991DE4001573A1 Extended bandwidth differential amplifier - has collectors of one pair of transistors controlling opposite base via two further transistors
07/24/1991EP0438257A2 High frequency amplifier
07/24/1991EP0438047A1 Microwave FET
07/24/1991CN2081605U Class ab bridge amplifier
07/23/1991US5034702 Amplifying circuit including a bias circuit for independently determining a drain current and a drain voltage
07/23/1991US5034700 Integratable amplifier circuit
07/23/1991US5034699 Trimming of operational amplifier gain
07/23/1991US5034698 Dual-path wideband and precision data acquisition system
07/23/1991US5034696 Circuit for the automatic control of the off-load voltage of a load, and differential comparator including this automatic control circuit
07/23/1991CA1286734C Envelope amplifier
07/17/1991CN2081171U High-gain multipurpose radio signal amplifier
07/16/1991US5033108 Signal repeater using shared amplification with selectable input/output connections
07/16/1991US5032885 Semiconductor device including a light receiving element, an amplifier, and an equalizer having a capacitor with the same laminate structure as the light receiving element
07/16/1991US5032799 Multistage cascode radio frequency amplifier
07/16/1991US5032798 Cavity means for microwave divider-combiner units
07/16/1991US5032797 Differential input stage having improved common mode rejection
07/11/1991WO1991010319A1 Amplifier with a tuned output transformer
07/11/1991DE3943081A1 Amplifier circuit for load control - has control signal energising each amplifier via potential separating stage
07/09/1991US5030925 Transimpedance amplifier
07/09/1991US5030922 Supply current compensation circuitry
07/09/1991CA2033380A1 Microwave fet
07/09/1991CA1286001C Means for reducing damage to jfets from electrostatic discharge events
07/03/1991EP0435578A2 Low-distortion radio-frequency amplifying apparatus
07/03/1991EP0435304A2 Acoustic apparatus and driving apparatus constituting the same
07/03/1991EP0435048A2 Broadband amplifier stage with controllable amplification
07/03/1991CN1052759A Amplifer with tuned adput transformer
07/02/1991US5029299 Power amplifier with current limiting means
07/02/1991US5029298 Transmitter circuit
07/02/1991US5029278 Transducer interface circuit
07/02/1991US5028882 Multiple output operational amplifier
07/02/1991US5028881 Highly linear operational transconductance amplifier with low transconductance
07/02/1991US5028880 Microwave power amplifier using phase inverters
07/02/1991US5028879 Compensation of the gate loading loss for travelling wave power amplifiers
07/02/1991US5028822 Circuit arrangement for processing analogue electrical signals
06/1991
06/27/1991DE4026123A1 Multiple earth amplifier circuit - uses additional circuit connected between collector of output transistor and collector load resistor
06/26/1991EP0434328A2 A microwave integrated circuit
06/26/1991EP0434294A2 A power control method for a voltage controlled power amplifier and circuitry used in the method
06/26/1991EP0433896A2 Low-noise preamplifier stage, in particular for magnetic heads
06/26/1991EP0433468A1 Current voltage converter
06/25/1991US5027084 Transceiver modules for phased array antenna
06/25/1991US5027082 Solid state RF power amplifier having improved efficiency and reduced distortion
06/25/1991US5027081 High gain differential-to-single ended amplifier having a tee network feedback loop
06/25/1991US5027016 Low power transient suppressor circuit
06/25/1991CA1285325C Low noise, high speed current or voltage amplifier
06/20/1991DE4038217A1 Differential amplifier with multiple differential stages - uses cross connection of inputs with voltage offsets to provide large linear characteristic
06/20/1991DE4037219A1 Linear two-stage amplifier - uses operational amplifier and output transistor in conjunction with voltage sources to limit output and provide compensation
06/20/1991DE3941677A1 Differential amplifier with multiple differential stages - uses common connection of inputs and outputs to achieve desired characteristics
06/18/1991US5025226 High-gain low-noise amplifier
06/18/1991US5025225 Amplifier having substantially constant D.C. to r.f. conversion efficiency
06/18/1991US5025169 Sensor in IC formation
06/12/1991EP0431687A1 High-frequency optoelectric front-end
06/12/1991CN1052232A Switching apparatus with cascaded switch sections
06/12/1991CN1052230A Transconductance amplifier
06/11/1991US5023951 Optical receivers
06/11/1991US5023915 Specialized amplifier systems for musical instruments
06/11/1991US5023570 Emitter-follower circuit
06/11/1991US5023568 Combined current differencing and operational amplifier circuit
06/11/1991US5023567 Integrated-circuit
06/11/1991US5023566 Voltage-switching
06/11/1991US5023478 Complementary emitter follower drivers
06/05/1991EP0430577A2 System for driving a load
06/05/1991EP0430509A2 Symmetric bi-directional amplifier
06/05/1991EP0430508A2 Matrixed mixer
06/05/1991EP0430238A2 Fiber optic receiving circuit for converting an optical signal to an electric signal
06/05/1991EP0430063A2 Switching apparatus with cascaded switch sections
06/05/1991EP0429829A2 An electronic comparator circuit
06/05/1991EP0429717A1 Transconductance amplifier
06/04/1991US5021748 Circular ring resonator distributive electromagnetic signal processor
06/04/1991US5021746 Amplifier output stage
06/04/1991US5021745 Difference amplifier circuit
06/04/1991US5021744 Differential amplifier with differential or single-ended output
06/04/1991US5021743 Biasing networks for matrix amplifiers
06/04/1991US5021693 Control circuit for floating gate four-quadrant analog multiplier
06/02/1991WO1991008580A1 Fiber optic transimpedance receiver
05/1991
05/30/1991WO1991007816A1 Difference amplifier employing input attenuator network and powered by a single polarity power supply
05/30/1991WO1991007815A1 Transducer signal conditioning circuit
05/30/1991WO1991007814A1 Fully differential cmos power amplifier
05/29/1991EP0429268A2 Current-mirror circuit with buffering transistor
05/29/1991DE3939020A1 HF power transmit stage - has adapting transmitter, increasing output impedance of HF power transmits stage
05/28/1991US5019789 Adaptive bias circuit for preventing turnoff in a push-pull stage
05/28/1991US5019788 Amplifier with wide dynamic range
05/23/1991CA2030505A1 High efficiency power amplifier
05/21/1991US5017888 Broadband nonlinear drive control network for linear amplifiers arranged in several amplifier channels
05/21/1991US5017887 High frequency IC power amplifier
05/21/1991US5017886 RF power combiner using baluns
05/21/1991US5017885 Optical amplifier with reduced nonlinearity
05/21/1991CA1284360C Low noise microwave amplifier having optimal stability, gain, and noise control
05/16/1991WO1991007067A1 High fidelity hearing aid amplifier
05/15/1991EP0427557A1 An amplifier circuit
05/15/1991EP0427387A2 Apparatus for converting input signals into an output signal
05/15/1991EP0427002A2 VHF power amplifier
05/15/1991CN1051438A Source voltage control circuit
05/14/1991US5015967 Integratable amplifier circuit
05/14/1991US5015966 Folded cascode amplifier
05/14/1991CA1284189C Amplifier circuit including single capacitor for dc differential-input balance
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