Output buffer circuit for semiconductor memory devices

Details Output buffer circuit for semiconductor memory devices Output buffer circuit for semiconductor memory devices

1997-12-29

1999-07-27

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327379, 326 23, 326 27, 326 87, H03K 190175

Patent

active

059296690

ABSTRACT:
Disclosed is an output signal buffer circuit of semiconductor memory devices comprises: a plurality of buffer groups each comprising a plurality of output buffers grouped into unit group, in which each output buffer comprises a pull up transistor and a pull down transistor connected between a power supply voltage and ground in series; driving means for sequentially driving respective buffer groups according to internal control signals; and control signal generating means for producing the internal control signals for sequentially driving said buffer groups to said driving means in accordance with an external control signal.

REFERENCES:
patent: 4959816 (1990-09-01), Iwahashi et al.
patent: 5173621 (1992-12-01), Fraser et al.
patent: 5231311 (1993-07-01), Ferry et al.
patent: 5475646 (1995-12-01), Ogihara
patent: 5576640 (1996-11-01), Emnett et al.
patent: 5739707 (1998-04-01), Barraclough

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