Integrator and image read device

Details Integrator and image read device Integrator and image read device

1991-10-03

1992-12-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214C, 307491, 307311, H01J 4014

Patent

active

051681536

ABSTRACT:
An integrator having a first circuit including an integrating capacitor and a feedback resistor, both being connected in parallel to each other in a negative feedback loop of the first circuit, and a second circuit, connected to an output side of the first circuit, for compensating for a leak by the feedback resistor. The first circuit operates as an integrator in high frequencies, and as a current-voltage converter in low frequencies. Further, the second circuit compensates for the leak by the feedback resistor, thereby to produce a value indicative of the result of integrating an input current.

REFERENCES:
patent: 4602171 (1986-07-01), Brisson et al.
patent: 4651032 (1987-03-01), Nobuta
patent: 4889985 (1989-12-01), Allsop et al.

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