Amplifiers – Wheatstone bridge with amplifier in at least one arm
Patent
1995-06-30
1997-03-18
Mottola, Steven
Amplifiers
Wheatstone bridge with amplifier in at least one arm
330295, H03F 326
Patent
active
056126476
ABSTRACT:
An RF power amplifier is presented herein including an RF source for providing a train of RF pulses having a fixed frequency and wherein each pulse is of a fixed amplitude and duration. A bridge circuit includes a first circuit having a first transistor switching means for, when on, connecting a DC voltage source across a load for DC current flow therethrough in a first direction. The bridge circuit includes a second circuit including a second transistor switch for, when on, connecting the DC voltage source across the load for DC current flow therethrough in a second direction. A switch driver control serves, when enabled, to pass the RF pulses for driving the first and second transistor switches on and off at a frequency dependent upon that of the RF signal and in such a manner that current from the DC voltage source alternately flows in the first and second directions through the load. Turn-on signals are provided and selectively applied to the switch driver control for enabling the switch driver control for passing the RF pulses to the transistor switches.
REFERENCES:
patent: 4117415 (1978-09-01), Hoover
patent: 4580111 (1986-01-01), Swanson
patent: 4949050 (1990-08-01), Swanson
patent: 5003271 (1991-03-01), Swanson
Harris Corporation
Mottola Steven
LandOfFree
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