Stabilized generator for supplying a threshold voltage to a MOS

Details Stabilized generator for supplying a threshold voltage to a MOS Stabilized generator for supplying a threshold voltage to a MOS

1989-03-06

1990-09-04

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307497, 307491, 3072965, 330261, H03K 301, H03F 345

Patent

active

049547283

ABSTRACT:
A stabilized bias generator supplies a threshold voltage to a MOS transistor fabricated on a common integrated circuit device. The bias generator automatically compensates for changes in the threshold voltage of the MOS transistor caused by varying operating parameters, changes in temperature or manufacturing parameters. A first comparator of a matched pair of comparators receives a biasing voltage and includes first and second inputs respectively receiving a variable voltage and a reference voltage. The second comparator of the matched pair has first and second inputs interconnected to receive the reference voltage. One of a pair of matched inverters has in input receiving an output from the first comparator and supplies at an output thereof the threshold voltage and the MOS transistor. The other of the matched pair of inverters is connected to receive an output from the second comparator. A third inverter is connected to receive an output from the second inverter and output the biasing voltage to the MOS transistor and to the first and second comparators. The third inverter is selected to have a threshold voltage substantially equal to the threshold voltage of the MOS transistor.

REFERENCES:
patent: 3546481 (1970-12-01), Talley
patent: 4342004 (1982-07-01), Iida et al.
patent: 4427903 (1984-01-01), Sugimoto
patent: 4553098 (1985-11-01), Yoh et al.
patent: 4563595 (1986-01-01), Bose
patent: 4584492 (1986-04-01), Sharp
patent: 4724344 (1988-02-01), Watanabe

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