High voltage drive output buffer for low Voltage integrated circ

Details High voltage drive output buffer for low Voltage integrated circ High voltage drive output buffer for low Voltage integrated circ

1998-03-09

2000-06-27

Santamauro, Jon

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 86, H03K 190185

Patent

active

060811323

ABSTRACT:
A high voltage drive output buffer for low voltage integrated circuits comprising a pullup pFET; a driver pFET having a source connected to the drain of the pullup pFET, and having a gate connected to a biasing circuit; a driver nFET having a drain connected to the drain of the driver pFET, and having a gate connected so as to be biased; and a pulldown nFET having a drain connected to the source of the driver nFET; wherein the pullup pFET and pulldown nFET are coupled to switch in complementary fashion in response to an input voltage; and wherein the biasing circuit comprises an nFET having a drain connected to the gate of the driver pFET and coupled to the input node so as to switch ON for a transitory period when the pullup pFET switches from OFF to ON.

REFERENCES:
patent: 5300832 (1994-04-01), Rogers
patent: 5440249 (1995-08-01), Schucker et al.
patent: 5506535 (1996-04-01), Ratner
patent: 5559464 (1996-09-01), Orii et al.
patent: 5834948 (1998-11-01), Yoshizaki et al.

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