Low-power, logic signal level converter

Details Low-power, logic signal level converter Low-power, logic signal level converter

1994-07-29

1995-11-21

Westin, Edward P.

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 71, 326 83, H03K 190185

Patent

active

054690803

ABSTRACT:
A low-power, logic signal level converter includes a CMOSFET current mirror differential amplifier with a current control element for providing a level-converted output logic signal in response to an input logic signal while ensuring that virtually no DC current is drawn during steady-state circuit operations. The CMOSFET current mirror differential amplifier includes a PMOSFET current mirror driven by NMOSFET pull-down transistors with a DC current-blocking PMOSFET between them. The interposed PMOSFET blocks DC current flow during steady-state circuit operation without adversely affecting the line driving capacity of the current mirror differential amplifier during logic signal transitions.

REFERENCES:
patent: 4656374 (1987-04-01), Rapp
patent: 4825110 (1989-04-01), Yamaguchi et al.
patent: 4845381 (1989-07-01), Cuevas
patent: 5019729 (1991-05-01), Kimura et al.
patent: 5202594 (1993-04-01), Chang
patent: 5266849 (1993-11-01), Kitahara et al.

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