Output buffer for memory circuit

Details Output buffer for memory circuit Output buffer for memory circuit

1995-09-28

1998-06-30

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327112, 327391, 327437, 326 27, 326 83, 326 87, H03K 300, H03K 1716

Patent

active

057739994

ABSTRACT:
An output buffer circuit comprising a pull-up transistor, a pull-down transistor coupled to the pull-up transistor, a first voltage source for supplying a driving voltage, a second voltage source for supplying a reference voltage, a device for comparing the driving voltage with the reference voltage, a driving voltage detector for producing a signal in response to operation of the comparing device, first and second pull-up driving buffers, the first and second pull-up driving buffers being activated according to the signal from the driving voltage detector, the pull-up transistor being driven by one of the pull-up driving buffers, and first and second pull-down driving buffers, the first and second pull-down driving buffers being activated according to the signal from the driving voltage detector, and the pull-down transistor being driven by one of the pull-down driving buffers.

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patent: 5319258 (1994-06-01), Ruetz
patent: 5438550 (1995-08-01), Kim
patent: 5500611 (1996-03-01), Popat et al.
patent: 5519338 (1996-05-01), Campbell et al.
patent: 5627487 (1997-05-01), Keeth

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