CMOS voltage reference circuit

Details CMOS voltage reference circuit CMOS voltage reference circuit

1993-11-29

1995-07-18

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327545, 327540, 327541, 327543, H03K 301

Patent

active

054345340

ABSTRACT:
A simple CMOS voltage reference circuit develops a reference voltage from the sum of the threshold voltages of a pair of complementary devices. In a p-type substrate a p-channel device is formed in an isolated n-type well, with the well tied to the source at the reference node. The drain is coupled to the drain of a complementary n-channel device. An additional p-channel device functions as a current source. The voltage reference circuit may be advantageously cascaded to improve stability and insensitivity to the power supply voltage.

REFERENCES:
patent: 4812735 (1989-03-01), Sawada et al.
patent: 5083079 (1992-01-01), Plants
patent: 5109187 (1992-04-01), Gulliani

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