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Title:
COLOR SENSOR CIRCUIT USING CHARGE STORAGE DEVICE
Document Type and Number:
Japanese Patent JP2006010686
Kind Code:
A
Abstract:

To provide a color sensor circuit that overcomes a defect related to a problem of space efficiency and temperature dependence.

The color sensor circuit has (a) a light detector 120 that receives light, generates a signal depending on the received light, and includes a first electrode combined to the first node and a second electrode combined with a second predetermined signal 122, (b) a storage device 130 including a first electrode and a second electrode combined with the second predetermined signal 122, (c) a first switch 140 for alternatively combining a first node with the first electrode of the storage device based on a charge storage control signal 144, (d) a signal processing circuit 160 including a first electrode and the output for generating a signal representing the light received by the light detector, (e) a second switch 150 for selectively combining the first electrode of the storage device with the first electrode of the signal processing circuit based on an evaluation control signal 154. The signal processing circuit selectively asserts the charge storage control signal and the evaluation control signal.


Inventors:
Boon, Keat Tan
HO, Chi Mun
Lim, Len LI Kevin
Application Number:
JP2005000173404
Publication Date:
January 12, 2006
Filing Date:
June 14, 2005
Export Citation:
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Assignee:
AGILENT TECHNOL INC
International Classes:
G01J3/51; G01J1/44; G01J1/46; G01J3/50; H01J40/14; H03F1/30
Attorney, Agent or Firm:
加藤 公久