Data output buffer of a semiconductor integrated circuit

Details Data output buffer of a semiconductor integrated circuit Data output buffer of a semiconductor integrated circuit

1994-06-08

1995-04-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327170, 327379, 326 21, H03K 309

Patent

active

054102626

ABSTRACT:
A data output buffer of a semiconductor integrated circuit is operable in response to data input to data lines and comprises a first pull-down control circuit which generates a first pull-down signal in response to the data input to the data lines. A second pull-down control circuit generates a second pull-down signal in response to the data input to the data lines, the second pull-down signal being generated at a predetermined time after the first pull-down signal is generated and causing the first pull down signal to be deactivated. A first pull-down transistor shares an output node with a pull-up transistor and is responsive to the first pull-down signal to pull-down a predetermined amount of voltage at the output node. A second pull-down transistor is responsive to the second pull down signal for pulling down a residual amount of voltage at the output node.

REFERENCES:
patent: 4928023 (1990-05-01), Marshall
patent: 5122690 (1992-06-01), Bianchi
patent: 5166555 (1992-11-01), Kano

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