Temperature-insensitive current controlled CMOS output driver

Details Temperature-insensitive current controlled CMOS output driver Temperature-insensitive current controlled CMOS output driver

1997-07-10

1999-07-27

Tokar, Michael

Electronic digital logic circuitry

Tri-state

With field-effect transistor

326 32, 326 27, 326 83, H03K 1900, H03K 1716, H03K 19094

Patent

active

059296542

ABSTRACT:
A circuit for selectively generating one of three voltage level as an output has a pull-up transistor and a pull-down transistor. The circuit includes a bias voltage source for generating a constant voltage signal; a temperature compensating constant-current source for outputting variable voltage signal corresponding to a temperature change; a tri-state control circuit for receiving a data signal to generate a control signal based on the data signal; and a switching circuit, in response to the control signal, for selectively the bias voltage source and the temperature compensating constant current source to the pull-up and pull-down transistors.

REFERENCES:
patent: 4334186 (1982-06-01), Sasayama et al.
patent: 4833350 (1989-05-01), Frisch
patent: 5051625 (1991-09-01), Ikeda et al.
patent: 5631600 (1997-05-01), Akioka et al.
patent: 5682110 (1997-10-01), Rountree
patent: 5798637 (1998-08-01), Kim et al.

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