Photodetecting circuit using avalanche photodiode

Details Photodetecting circuit using avalanche photodiode Photodetecting circuit using avalanche photodiode

1994-12-20

1996-08-20

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214R, 327514, H01J 4014

Patent

active

055481124

ABSTRACT:
A photodetecting circuit using an avalanche photodiode of the present invention has an avalanche photodiode, and a bias control means for applying a bias voltage to the avalanche photodiode to drive the avalanche photodiode at a high multiplication factor. The bias control means has a diode having the same temperature dependence of a breakdown voltage as that of the avalanche photodiode, and a control circuit for applying positive and negative potentials with respect to the ground potential between the anode and the cathode of the diode such that the diode is set in a breakdown state at a predetermined current. A positive or negative potential is applied from one of the anode and the cathode of the avalanche photodiode as a bias voltage, and a photocurrent is output from the other terminal of the avalanche photodiode.

REFERENCES:
patent: 3560755 (1971-02-01), Blaise
patent: 4153835 (1979-05-01), Lau et al.
patent: 4236069 (1980-11-01), Laughoin
patent: 4292514 (1981-09-01), Ohtomo
patent: 4438348 (1984-03-01), Casper et al.
patent: 4626676 (1986-12-01), Gerardin
patent: 4730128 (1988-03-01), Seki

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