Solid state imaging device and output circuit thereof having...

Details Solid state imaging device and output circuit thereof having... Solid state imaging device and output circuit thereof having...

2007-11-05

2009-06-23

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S208100, C250S2140DC, C348S308000

Reexamination Certificate

active

07550706

ABSTRACT:
An output circuit of a solid state imaging device comprises: a source follower circuit that amplifies a voltage value signal converted by a charge detecting portion in accordance with an amount of a signal charge stored by each of pixels and outputs the amplified voltage value signal; a reset transistor that discards the signal charge in the charge detecting portion, which had been subjected to formation of the voltage value signal, to a reset drain in an application of a reset pulse; a bias voltage generating circuit that applies a bias voltage, generated from a power supply, through a resistor to a gate of the reset transistor to which the reset pulse is applied from a reset pulse generating circuit through a coupling capacitor; and a protecting device that applies a voltage of the power supply to a node of the gate and the coupling capacitor to charge the coupling capacitor by the power supply when the power supply is turned ON.

REFERENCES:
patent: 5825695 (1998-10-01), Hamaguchi
patent: 6316760 (2001-11-01), Koyama
patent: 2002-335449 (2002-11-01), None
patent: 2006-165290 (2006-06-01), None

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