SIGNAL PROCESSING DEVICE AND PHOTODETECTION DEVICE

Title:

SIGNAL PROCESSING DEVICE AND PHOTODETECTION DEVICE

Document Type and Number:

WIPO Patent Application WO/2010/090135

Kind Code:

A1

Abstract:

In a signal processing device, an integrating circuit accumulates the electric charge from a photodiode in an integral capacity element and outputs a voltage value in accordance with the amount of the electric charge. A comparison circuit outputs a saturation signal when the voltage value from the integrating circuit reaches the reference value. An electric charge-injection circuit injects an electric charge having reverse polarity into the integral capacity element according to the saturation signal. A counting circuit performs counting according to the saturation signal. Holding circuits hold the voltage value from the integrating circuit. An amplifier circuit outputs a voltage value K times (wherein K>1) larger than the voltage value held by the holding circuits. An AD conversion circuit takes a voltage value K times larger than the reference value as the maximum input voltage value, that is, as a full-scale value, and outputs the digital value corresponding to the voltage value from the amplifier circuit.

Inventors:

MIZUNO SEIICHIRO (JP)
YAMAMOTO HIROO (JP)
KOBAYASHI MAKOTO (JP)

Application Number:

PCT/JP2010/051226

Publication Date:

August 12, 2010

Filing Date:

January 29, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HAMAMATSU PHOTONICS KK (JP)
MIZUNO SEIICHIRO (JP)
YAMAMOTO HIROO (JP)
KOBAYASHI MAKOTO (JP)

International Classes:

H01L31/10; G01J1/44; G01T1/17; G01T1/20; G01T7/00; H04N5/335; H04N5/357; H04N5/369; H04N5/378

Foreign References:

JP2003028713A	2003-01-29
JP2000180260A	2000-06-30
JP2004047618A	2004-02-12
JPH05328230A	1993-12-10
JPS645226A	1989-01-10
JP2001141562A	2001-05-25
JPH09298690A	1997-11-18
JPH05215607A	1993-08-24

Other References: