AD conversion method, AD converter, semiconductor device for...

Details AD conversion method, AD converter, semiconductor device for... AD conversion method, AD converter, semiconductor device for...

2006-08-08

2006-08-08

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

Reexamination Certificate

active

07088279

ABSTRACT:
In a solid-state imaging device including an analog-to-digital converter, a clock converter that generates a high-speed clock that is faster than a master clock is provided. A voltage comparator compares a pixel signal input from a vertical signal line for each row control line with a reference voltage, generating pulses having magnitudes corresponding to a reset component or a signal component in a temporal direction. A counter counts the width of pulse signals until completion of the comparison in the voltage comparator based on a clock that is generated based on the high-speed clock, holding a count value at a time of completion of the comparison. A communication and timing controller exercises control so that the voltage comparator performs comparison for the reset component and the counter performs down-counting in a first processing iteration and so that the voltage comparator performs comparison for the signal component and the counter performs up-counting in a second processing iteration.

REFERENCES:
patent: 3990000 (1976-11-01), Digneffe
patent: 4627505 (1986-12-01), Kunz
patent: 4710817 (1987-12-01), Ando
patent: 5014056 (1991-05-01), Moriwaki
patent: 6404372 (2002-06-01), Heithoff

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