Title:
PHOTOELECTRIC SIGNAL READ CIRCUIT FOR OPTICAL SENSOR ARRAY
Document Type and Number:
Japanese Patent JPS6362453
Kind Code:
A
Abstract:
PURPOSE:To extract a photoelectric signal at high speed with high fidelity by decreasing a junction capacitance in a MOS transistor (TR) being most part of a leakage capacitance in a signal read wire. CONSTITUTION:When a readout switch 2i is turned on sequentially by a scanning command SS, a readout current signal RS is given from each capacitor Ci via the readout switch 2i and given to one input of an operational amplifier 41 of a current amplifier circuit 40. A bias potential BP from a potential provision means 50 is given to the other input of the operational amplifier 41. An amplifier having a high gain and an excellent high frequency characteristic is used for the operational amplifier 41 and a resistor having a comparatively low resistance is used for a feedback resistor 42. Thus, the leakage capacitance of a signal readout line 30 is reduced and a signal with high fidelity is extracted.
Inventors:
DOGOSHI HITOSHI
Application Number:
JP20663086A
Publication Date:
March 18, 1988
Filing Date:
September 02, 1986
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H01L27/146; H01L27/14; H04N1/028; H04N1/04; H04N1/19; H04N5/335; H04N5/357; H04N5/369; H04N5/372; H04N5/374; (IPC1-7): H01L27/14; H04N1/028; H04N1/04; H04N5/335
Domestic Patent References:
| JPS58131765A | 1983-08-05 |
Attorney, Agent or Firm:
Iwao Yamaguchi
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