Title:
光検出回路
Document Type and Number:
Japanese Patent JP3999325
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a convenient photodetector circuit suitable for IC in which temperature compensation can be carried out with high accuracy. SOLUTION: A reference voltage generation circuit 4 feeds a voltage having a temperature coefficient substantially identical to that of an APD(avalanche photodiode) 1 to the noninverted input terminal of an amplifier 2 while varying depending on the ambient temperature. The amplifier 2 amplifies a photocurrent being fed from the APD 1 to the inverted input terminal based on the voltage being fed to the noninverted input terminal. Temperature compensation is achieved by suppressing temperature fluctuation of a voltage signal obtained through I-V conversion of the photocurrent.
Inventors:
Takashi Suzuki
Masahara Sahara
Masahara Sahara
Application Number:
JP1928898A
Publication Date:
October 31, 2007
Filing Date:
January 30, 1998
Export Citation:
Assignee:
Hamamatsu Photonics Co., Ltd.
International Classes:
G01J1/42; G01J1/44; H01L31/10
Domestic Patent References:
| JP62139403A | ||||
| JP58003335A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Tatsuya Shioda
Shiro Terasaki
Kazuo Yoshii
Tatsuya Shioda
Shiro Terasaki
Kazuo Yoshii