Title:
PHOTON DETECTOR
Document Type and Number:
WIPO Patent Application WO/2010/029638
Kind Code:
A1
Abstract:
Provided is photon detector which enables an APD response by a sinusoidal wave-shaped gate signal operable by an arbitrary drive frequency without requiring a special band removing filter. The photon detector includes: a sinusoidal wave generator (3) which generates a sinusoidal wave-shaped gate signal; a beam splitter (7) which branches the gate signal; a bias circuit (5) which supplies a signal obtained by superposing a predetermined DC voltage on the gate signal which has passed through the beam splitter (7), to an avalanche photo diode; a dummy circuit (6) which inputs the gate signal via the beam splitter (7) and outputs a response signal simulating the avalanche photo diode; a differential amplifier (10) which amplifies a differential input between the response signal from the avalanche photo diode and the response signal from the dummy circuit (6); and a comparator (11) which outputs a photon detector signal when the output from the differential amplifier (10) exceeds a predetermined threshold voltage.
Inventors:
NISHIOKA, Tsuyoshi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 10083, JP)
Application Number:
JP2008/066563
Publication Date:
March 18, 2010
Filing Date:
September 12, 2008
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 10083, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 10083, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 10083, JP)
International Classes:
H01L31/107
Attorney, Agent or Firm:
SOGA, Michiharu et al. (S. Soga & Co, 8th Floor Kokusai Building,1-1, Marunouchi 3-chom, Chiyoda-ku Tokyo, 100-0005, JP)
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