Chopper comparator and A/D converter

Details Chopper comparator and A/D converter Chopper comparator and A/D converter

1997-08-13

1999-09-14

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341156, 326 84, H03M 112

Patent

active

059529512

ABSTRACT:
A chopper comparator is constructed by connecting current control transistors Q.sub.15 to Q.sub.17 comprising p-channel MOSFETs between CMOS inverters 3 to 5 and a power source 7 to supply a power voltage V.sub.DD . A control signal V.sub.C to control a current flowing in the CMOS inverters 3 to 5 is supplied to gates of the current control transistors Q.sub.15 to Q.sub.17. In case of constructing the A/D converter, the chopper comparator is used.

REFERENCES:
patent: 4274014 (1981-06-01), Schade, Jr.
patent: 4791326 (1988-12-01), Vajdic et al.
patent: 5614847 (1997-03-01), Kawahara et al.
patent: 5835045 (1998-11-01), Ogawa et al.

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