Variable voltage, variable impedance CMOS off-chip driver and re

Details Variable voltage, variable impedance CMOS off-chip driver and re Variable voltage, variable impedance CMOS off-chip driver and re

1996-02-07

2000-05-09

Tokar, Michael

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 68, 326 86, 326 30, H03K 190175

Patent

active

060609052

ABSTRACT:
An electronic apparatus is disclosed having: a plurality of electronic devices with the same or different internal voltages; an interconnection between two or more of the plurality of electronic devices; each of said two or more electronic devices has an internal voltage; driver and receiver circuits which send and receive signals at a selectable communication voltage levels for interfacing between said two or more electronic devices, at a common communication voltage which is less than the highest value of said internal voltages of said two or more electronic devices; a circuit for configuring the driver and receiver circuits; and the driver circuit are configured to have a substantially constant output impedance independent of their output voltage.

REFERENCES:
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patent: 5162672 (1992-11-01), McMahan et al.
patent: 5444392 (1995-08-01), Sommer et al.
patent: 5444397 (1995-08-01), Wong et al.
patent: 5477172 (1995-12-01), Schnizlein
patent: 5534801 (1996-07-01), Wu et al.
patent: 5543733 (1996-08-01), Mattos et al.
patent: 5583454 (1996-12-01), Hawkins et al.
patent: 5612637 (1997-03-01), Shay et al.
IEEE Journal of Solid-State Circuits, vol. 23, No. 2, Apr. 1988, pp. 457-464, A Self-Terminating Low-Voltage Swing CMOS Output Driver, Thomas F. Knight, Jr. and Alexander Krymm.

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