Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1993-05-03
1994-06-14
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250561, H01J 4014
Patent
active
053212525
ABSTRACT:
Improved Driver circuitry for multiple combination LED/silicon detector sensors arranged in an array or scattered in a machine, wherein the LEDs and detectors are connected in a matrix arrangement to common busses to reduce the number of connections and minimize interference. Grounding gates are toggled "ON" and "OFF" prior to actuating the driver circuitry to reduce the presence of live voice.
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patent: 4171130 (1979-10-01), Jeschke et al.
patent: 4559451 (1985-12-01), Curl
patent: 4691385 (1987-09-01), Tupman
patent: 4691912 (1987-09-01), Gillmann
patent: 4886976 (1989-12-01), Tolmie, Jr.
Pickering, Jr. William
Riello Christopher S.
Tolmie, Jr. Robert J.
Van Gorp Mark W.
Allen Stephone B.
Nelms David C.
Parks, Jr. Charles G.
Pitney Bowes Inc.
Scolnick Melvin J.
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