Amplifiers – With amplifier bypass means
Patent
1991-04-11
1992-11-03
Mottola, Steven
Amplifiers
With amplifier bypass means
330286, H03F 132
Patent
active
051608952
ABSTRACT:
A Monolithic Microwave Integrated Circuit (MMIC) amplifier with extended dynamic range includes a base circuit for receiving both a first input signal, which is the signal to be amplified, and an amplifier generated second input signal. A power amplifier in the base circuit directly receives and amplifies the first input signal, with some unavoidable distortion to the first input signal. A first directional coupler is connected with the base circuit to couple the output of the power amplifier with the first input signal to cancel the first input signal component from the output of the power amplifier and generate the second input signal which is only distortion. This distortion is then amplified by an error amplifier in the base circuit, and the output of the error amplifier is coupled with the output of the power amplifier through a second directional coupler. This coupling at the second directional coupler cancels the distortion from the output of the power amplifier to provide the desired amplified signal.
REFERENCES:
patent: 4583049 (1986-04-01), Powell
patent: 4617522 (1986-10-01), Tarbutton et al.
patent: 4916407 (1990-04-01), Olver
patent: 4926134 (1990-05-01), Olver
Estrick Vaughn H.
Siddoway Ronald T.
Denson-Low Wanda K.
Hughes Aircraft Company
Mottola Steven
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