CMOS sensor circuit having a voltage control circuit controlling a gate potential of a photodiode reset transistor to a potential other than power source potentials
AssigneeFujitsu Limited
InventorsMasatoshi Kokubun, Katsuyosi Yamamoto, Chikara Tsuchiya
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Abstract
The CMOS sensor circuit comprises a photodiode, a reset transistor resetting the photodiode to an initial voltage, and a voltage control circuit controlling a gate potential of the reset transistor to a potential other than power source potentials. The voltage control circuit consists of an inverter circuit driving a gate of the reset transistor. The inverter circuit includes a P-channel MOS transistor, an N-channel MOS transistor, and a transistor inserted between a drain of the P-channel MOS transistor and a drain of the N-channel MOS transistor so as to control a blooming.
Claims36
A CMOS sensor circuit comprising:
- a photodiode;
- a reset transistor resetting said photodiode to an initial voltage;
- and
- a voltage control circuit controlling a gate potential of said reset transistor to a potential other than power source potentials.
A CMOS sensor circuit comprising:
- a photodiode;
- a reset transistor resetting said photodiode to an initial voltage;
- and
- a voltage control circuit keeping a gate potential of said reset transistor from completely becoming off.
Dependencies are inferred from the claim text.