Optical control of a microwave switch

Details Optical control of a microwave switch Optical control of a microwave switch

1991-11-06

1992-11-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

307311, G02B 2700

Patent

active

051626578

ABSTRACT:
An optical controlled attenuator circuit for controlling a microwave varie attenuator. The optical controlled attenuator circuit includes, a light source, a control connected to the light source, an optic fiber having an end coupled to the light source, a field effect transistor coupled to a second end of the optic fiber, a first inverting amplifier coupled to the field effect transistor, a second non-inverting amplifier coupled to the first amplifier means, a third non-inverting amplifier coupled to the second amplifier, a fourth inverting amplifier means also coupled to the second amplifier, and a microwave variable attenuator having first and second inputs respectively coupled to the fourth inverting amplifier and to the third non-inverting amplifier means and having an RF input and an RF output.

REFERENCES:
patent: 4369371 (1983-01-01), Hara et al.
patent: 4570079 (1986-02-01), Davis
patent: 4595881 (1986-06-01), Kennan
patent: 4859965 (1989-08-01), Paolella et al.
patent: 5001355 (1991-03-01), Rosen et al.
patent: 5012084 (1991-04-01), Guiberteau et al.
patent: 5012097 (1991-04-01), Oda
patent: 5073718 (1991-12-01), Paolella
patent: 5086281 (1992-02-01), Paolella

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