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7321752 |
Linear amplification arrangement with non-linear amplifier element for a mobile radio device
A system and method to optimize the efficiency of an amplifier device is provided by the including a non-linear amplifier in a mobile radio device. A phase displaced signal in relation to the input...
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7145392 |
Methods and apparatus for variable harmonic distortion
Methods and apparatus for producing first and second drive signals from an input signal such that each drive signal is about 180 degrees out of phase with respect to the other; variably altering at...
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7030690 |
Operational amplifier with selectable performance characteristics
An operational amplifier with selectable performance characteristics is provided. The operational amplifier provides a sleep mode (e.g., fully disabled) in addition to providing a number of...
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5838196 |
Transformer-coupled amplifier
A transformer-coupled amplifier includes a driver transformer in which a primary winding, a secondary winding, and a tertiary winding are wound on a core of a magnetic circuit, a drive signal...
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5731740 |
Circuit bias via transformer
In an amplifier module circuit, an input transformer (TI) transforms an input signal (ISU) into a transformed input signal (ISB), which is supplied to a pair of amplifiers (AMPA, AMPB). In addition...
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5498996 |
High-power, high-fidelity tube amplifier
A high-power, high-fidelity tube amplifier which includes a plurality of output tubes connected in parallel with individual current sinks and a plurality of parasitic suppression components. Each...
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5107223 |
Phase inverter and push-pull amplifier using the same
A phase inverter includes first, second, third and fourth terminals, a first coupling circuit coupled between the first and second terminals, a second coupling circuit coupled between the second...
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4554510 |
Switching fiber optic amplifier
A fiber optic amplifier utilizes a crystal fiber of laser material to bidirectionally amplify light signals. This amplifier permits the application of both pumping illumination and the signal to be...
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4066975 |
Audio amplifier with improved stability
In a wide-band electronic AC amplifier, the first stage is direct coupled to a split load phase inverter which is RC coupled to a push-pull power output stage and the output is obtained through...
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4047120 |
Transient suppression circuit for push-pull switching amplifiers
A protective coupling circuit is located between the D.C. supply voltage the amplifier components of a push-pull switching amplifier to suppress transients created during switching. The coupling...
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3845392 |
BEACON TRANSMITTER
A radio transmitter system which utilizes solid state modular power amplifier branches connected in parallel. The amplifier branches are fed from an exciting stage via a splitter-isolator network....
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3778730 |
LOW HARMONIC TELEPHONE RINGING GENERATOR
A ringing generator for telephone communication systems having output voltage and frequency regulation. A pair of transistor amplifiers in connection with a plural winding output transformer...
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3747006 |
HIGH SPEED AMPLIFIER FOR USE WITH AN INDUCTIVE LOAD
Amplifier apparatus which employs a center tapped energy storage inductor for rapidly varying the magnitude and direction of current through an inductive load. The load is connected between a...
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3714597 |
BROADBAND POWER AMPLIFIER WITH MULTIPLE STAGES CONNECTED BY BALUN TRANSFORMERS
Broadband power amplifier including a single ended stage coupled to a plurality of stages by use of balun transformers. Broadband operation is achieved by use of balun transformer having...
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3652948 |
POWER AMPLIFIER INCLUDING PLURALITY OF PUSH-PULL AMPLIFIER SECTIONS COUPLED BY FERRITE MATCHING TRANSFORMERS
A high power semiconductor amplifier, which may be used as the power amplifier of a radio transmitter, includes a plurality of push-pull amplifier sections cooperating to provide the required...
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3652947 |
POWER AMPLIFIER INCLUDING PLURALITY OF PUSH-PULL AMPLIFIER SECTIONS HAVING OUTPUTS COUPLED IN PARALLEL
A high power semiconductor amplifier, which may be used as the power amplifier of a radio transmitter, includes a plurality of push-pull amplifier sections cooperating to provide the required...
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3573648 |
HIGH POWER AUDIO AMPLIFIER HAVING FEEDBACK PROVIDED BY A WINDING COFILAR WITH AN OUTPUT TRANSFORMER PRIMARY WINDING
A high-power audio amplifier employing both cathode and anode load unity coupled cofilarly wound transformer primary windings, providing negative feedback by means of a transformer winding which is...
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3484709 |
SOLID STATE AUDIO DRIVER CIRCUIT
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3479553 |
DEFLECTION AMPLIFIER
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3400329 |
Method and means for correcting amplitude and delay distortion in a transmission path
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3363177 |
Transistor amplifier and measuring device
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3348160 |
Isolator network for providing a plurality of output signals from a single signal source
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3316504 |
Circuit for extending bandwidth of a modulated amplifier
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3287652 |
Push-pull amplifier circuit having an inductive load and method for obtaining a symmetrical gain
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3256490 |
Push-pull transistor amplifier provided with combined current and voltage negative feedback
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3256491 |
Circuit for simultaneously coupling an r.f. signal to a plurality of antennas
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3255419 |
Wide band amplifier circuit having current amplifier input stage and operational amplifier output stage
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3225146 |
Stereophonic phonograph system
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3223933 |
Single-ended push-pull distortionless power amplifier including d.c. feedback
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3221261 |
Amplifying system including a push-pull preamplifier and output switching amplifier
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3192404 |
Anti-saturation circuit for read amplifier shaper
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3171088 |
Phase-splitter circuit for use with an audio amplifier
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3160706 |
Stereophonic sound reproducing system
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3155916 |
Broad-band distributed amplifier
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3153766 |
Mode of operation of the pentode or tetrode tube in the output stage of an audio power amplifier
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3132307 |
Wide band differential amplifier having a.d.c. dropping stage
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3127569 |
Valve amplifier push-pull output stage
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3122713 |
Stereophonic amplifier
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3100878 |
Boot strap electronic amplifier having in-phase grids
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3096486 |
Push-pull parallel operating circuit for power transmission devices
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3066188 |
Unbalanced autotransformer audio amplifier
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3030445 |
Communication systems
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2991428 |
Electronic generator of telephone ringing current
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2980840 |
Wide band, low distortion, high efficiency amplifier
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2976493 |
Phase stable amplifier
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2946000 |
Magnetic amplifiers
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2942202 |
Amplifier circuit for electrical signals
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2931990 |
Class b amplifiers
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2929028 |
Audio amplifier
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2924780 |
Audio amplifier system
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