Multi-stage amplifier with shared directional coupler feedback
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United States of America Patent
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May 4, 1993
Grant Date -
N/A
app pub date -
Apr 5, 1991
filing date -
Apr 5, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An n-stage amplifier circuit includes n+1 directional couplers connected in series between the circuit input, the amplifier stages, and the circuit output. Each coupler includes first and third ports forming an inverting interface, and second and fourth ports forming a non-inverting interface, the ports being coupled through suitable windings. Feedback lines are connected between adjacent successive couplers. The interfaces of the couplers are connected such that feedback loops covering one or more contiguous successive amplifier stages provide negative feedback for the amplifier circuit.
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Cited Art Landscape
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