On chip driver for electric shuttering

Details On chip driver for electric shuttering On chip driver for electric shuttering

1995-02-15

1997-01-28

Garber, Wendy

Television

Camera, system and detail

Solid-state image sensor

348207, H04N 5335

Patent

active

055982107

ABSTRACT:
An electronic shutter that employs a voltage multiplier built within the image sensor semiconductor chip to produce a voltage level that is twice that of the supply. A single control pulse is used to actuate the voltage multiplied level which is then applied to a circuit that uses the increased level. The voltage multiplier is a capacitive based circuit that precharges a capacitor to a given supply voltage. Upon application of a shutter control signal, the supply voltage is then applied to the opposite side of the capacitor while retaining the potential difference across the capacitor, thereby, doubling the voltage level on the first side of the capacitor. This doubled voltage is then used for electronic shuddering purposes.

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patent: 5303052 (1994-04-01), Narabu et al.
patent: 5471246 (1995-11-01), Nishima et al.

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