Precision MOS resistor

Details Precision MOS resistor Precision MOS resistor

1992-04-23

1994-09-06

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307304, 307490, 307491, 307571, 307585, H03K 3353

Patent

active

053451180

ABSTRACT:
A precision resistor using MOS devices. The present invention utilizes an NMOS resistive element to simulate the resistor. A pair of PMOS source followers are implemented to control the value of the resistor and cancel the non-linearity due to the drain-source voltage V.sub.ds. A pair of NMOS source followers serve to eliminate non-linear distortions due to the "body effect" that can exist in the resistive element. The resistor circuit of the present invention provides higher precision, linearity and high value resistors in a smaller area than prior art MOS resistors.

REFERENCES:
patent: 3739195 (1973-06-01), Fidi et al.
patent: 4071778 (1978-01-01), Nakagomi
patent: 4288707 (1981-09-01), Katakura
patent: 4395643 (1983-07-01), Lehmann
patent: 4517508 (1985-05-01), Sakai
patent: 4529897 (1985-07-01), Suzuki et al.
patent: 4877980 (1989-10-01), Kubinec
patent: 5045832 (1991-09-01), Tam
patent: 5065057 (1991-11-01), Kawasaki

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