Chopper type comparator

Details Chopper type comparator Chopper type comparator

1999-04-20

2000-11-21

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327337, H03K 5153

Patent

active

061508500

ABSTRACT:
A chopper type comparator has one terminal of a first capacitor C1 connected to a connecting point P of a first switch SW1 and a second switch SW2, and an analog input signal A.sub.IN and a reference voltage V.sub.REF are supplied in an alternating fashion. The first capacitor C1, first inverter INV1, second capacitor C2, second inverter INV2, and third inverter INV3 are connected in series in this order. The input and output terminals of the first inverter INV1 are connected via a third switch SW3, and both terminals of the second capacitor C2 are connected via a fifth switch SW5. The input and output terminals of the second inverter INV2 are connected via a fourth switch SW4. The second capacitor 2 can be reset in a short time by the fourth and fifth switches SW4 and SW5.

REFERENCES:
patent: 5936434 (1999-08-01), Kumamoto et al.
patent: 5973517 (1999-09-01), Kurauchi et al.

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