Feed-forward-back suppressed noise circuits

Details Feed-forward-back suppressed noise circuits Feed-forward-back suppressed noise circuits

2006-06-20

2006-06-20

Choe, Henry (Department: 2817)

Amplifiers

With amplifier bypass means

C330S149000

Reexamination Certificate

active

07064608

ABSTRACT:
A noiseless amplifier circuit has an amplifier, a first circuit that isolates amplifier generated noise and provides the desired gain, a second circuit that cancels the amplifier generated noise from the output signal from the amplifier, a closed loop feedback third circuit that modulates the input signal to the amplifier to compensate for amplifier generated noise, and first and second controls that keep phase and amplitude balanced at a combiner in the first and second circuits, respectively. An oscillator circuit and a mixer circuit incorporate the noiseless amplifier circuits.

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