Amplifiers – Signal feedback – Plural amplifier channels
Patent
1990-02-14
1991-07-02
Mullins, James B.
Amplifiers
Signal feedback
Plural amplifier channels
330 52, 330 85, 330124R, 330295, 333120, H03F 368
Patent
active
050288806
ABSTRACT:
A microwave power amplifier includes first and second circuits each having first, second, third and fourth terminals. Each of the first and second circuits has functions of distributing an input signal to the second and third terminals and generating first and second output signals 180.degree. out of phase with each other through the second and third terminals, respectively, adding a first pair of 180.degree. out-of-phase input signals to the second and third terminals and outputting a first resultant signal through the first terminal, and adding a second pair of in-phase input signals to the second and third terminals and outputting a second resultant signal through the fourth terminal. The microwave power amplifier further includes a first amplifier circuit connected between the second terminal of the first circuit and the third terminal of the second circuit, a second amplifier circuit connected between the third terminal of the first circuit and the second terminal of the second circuit, and a feedback circuit connected between the fourth terminal of the first circuit and the first terminal of the second circuit. The first terminal of the first circuit serves as an input terminal of the microwave power amplifier, and the fourth terminal of the second circuit serves as an output terminal of the microwave power amplifier.
REFERENCES:
patent: 3909742 (1975-09-01), Cox et al.
Fujitsu Limited
Mullins James B.
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