H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/202
H03K 17/16 (2006.01) G11C 7/22 (2006.01) G11C 8/18 (2006.01) H03K 19/003 (2006.01)
Patent
CA 1246160
RCA 83,456 Abstract An amplifier applies turn-on bias to the gate electrode of an output field-effect transistor in response to a first level of an input signal applied to the amplifier. A switched power source supplies operating current to the amplifier for developing the turn-on bias when the amplifier input signal is at the first level. A feedback-controlled bypass circuit diverts a portion of the operating current from the amplifier during an initial turn on period and gradually reduces the magnitude of the diverted operating current as the output transistor turns on thereby producing a "soft" turn-on of the output transistor so as to minimize a potential for creating radio frequency interference in nearby RFI sensitive devices such as the tuner in a television or radio receiver. Complementary circuits include dual current supply and diversion circuits providing controlled rise and fall times for complementary field-effect output transistors.
550086
Eckersley Raymond A.
Rca Corporation
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