Adjustable radiation-controlled filter with voltage controlled b

Details Adjustable radiation-controlled filter with voltage controlled b Adjustable radiation-controlled filter with voltage controlled b

1989-06-15

1992-04-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250551, 330 59, H01J 4014

Patent

active

051030845

ABSTRACT:
Embodiments disclose an adjustable filter (cf voltage-controlled bandwidth) having photoconductors whose resistance is adjusted by variable-intensity radiation source means, with a related feedback loop to compensate for thermal changes.

REFERENCES:
patent: 3772514 (1973-11-01), Sunderland
patent: 3940715 (1976-02-01), Lum
patent: 4568886 (1986-02-01), English
patent: 4746876 (1988-05-01), Sibiga

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