Input voltage-induced spurious current canceler for autozero typ

Details Input voltage-induced spurious current canceler for autozero typ Input voltage-induced spurious current canceler for autozero typ

1993-05-03

1995-03-14

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 91, 327 94, 327 63, 327307, H03K 5153

Patent

active

053979362

ABSTRACT:
In an autozero type MOSFET comparator, the spurious current induced by the high frequency input voltage can flow through the resistance of the reset switch to introduce an offset voltage error during the autozero mode. A canceler is used to prevent the spurious current from flowing through the reset switch. A T-network with two series capacitors and a shunt switch is used as the canceler. The spurious current is by-passed by the shunt switch and prevented from flowing through the reset switch placed at the output of the T-network.
The spurious current canceler is particularly useful for a sub-ranging ADC, where the comparator is used also as a sample-and-hold circuit to hold the input voltage across the series capacitors by opening all the sampling switches, the reset switch and the shunt switch.

REFERENCES:
patent: 3676702 (1972-07-01), McGrogan, Jr.
patent: 4211942 (1980-07-01), Aoki et al.
patent: 4560890 (1985-12-01), Masuda et al.
patent: 4656429 (1987-04-01), Masuda et al.
patent: 4695748 (1987-09-01), Kumamoto
patent: 4816701 (1989-03-01), Ando et al.
patent: 4845383 (1989-07-01), Iida
patent: 4947168 (1990-08-01), Myers
patent: 5010338 (1991-04-01), Miki et al.
patent: 5075688 (1991-12-01), Hosotani et al.

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