Fast dither detector for fiber optic sensor

Details Fast dither detector for fiber optic sensor Fast dither detector for fiber optic sensor

1986-08-13

1988-06-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250214R, H01J 516

Patent

active

047513810

ABSTRACT:
This invention relates to a detection circuit for use in a servo controlled fiber optic sensor. A low noise signal with an amplitude proportional to the magnitude of the synchronous detection output is produced without the use of filter by a calculation of the average vale of the synchronous detector output signal driving one complete cycle of the dither signal cycle. This value is fed into sample and hold circuitry, which in turn controls the series motor.

REFERENCES:
patent: 4352981 (1982-10-01), Sugiyama et al.
patent: 4374323 (1983-02-01), Winslow et al.

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