Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1981-03-03
1982-07-27
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
307311, G01J 350
Patent
active
043419569
ABSTRACT:
A sample and hold auto-zeroing feedback circuit is utilized to drive the dark current of a solid state photodiode to zero in the absence of incident light photons. The just previously attained compensation is then held during a subsequent quantitative measurement cycle when the photodiode is illuminated. Plural linear and/or non-linear signal processing stages may also be included within the auto-zero compensation feedback loop such that their normal offset errors are also simultaneously compensated.
REFERENCES:
patent: 3600584 (1971-08-01), Schneble
patent: 3600589 (1971-08-01), Hanson
patent: 3660769 (1972-05-01), Jordan et al.
patent: 3683187 (1972-08-01), Tompkins
patent: 3714591 (1973-01-01), Allington
patent: 3715588 (1973-02-01), Rose
patent: 3735152 (1973-05-01), Oda
patent: 3764922 (1973-10-01), Gilbert et al.
patent: 3772604 (1973-11-01), Hogg et al.
patent: 4025869 (1977-05-01), Smith
patent: 4036763 (1977-07-01), Stephenson
patent: 4061925 (1977-12-01), van der Gaag et al.
patent: 4070581 (1978-01-01), Gibbons et al.
patent: 4080074 (1978-03-01), French
patent: 4119918 (1978-10-01), Moser
patent: 4220860 (1980-09-01), Carlson et al.
Hostetter Darwin R.
Nelms David C.
Pfizer Inc.
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