Circuit for decreasing current consumption in data output circui

Details Circuit for decreasing current consumption in data output circui Circuit for decreasing current consumption in data output circui

1992-01-23

1994-03-01

LaRoche, Eugene R.

Static information storage and retrieval

Powering

365227, G11C 300

Patent

active

052914542

ABSTRACT:
An improved output buffer circuit applicable to dynamic random access memories (DRAms) is disclosed. First power supply voltage Vcc1 is supplied to a conventional output main amplifier 3ai. Second power supply voltage Vcc2 is supplied to output driver circuit 4i. Potential fixing circuit 3bi operated in response to power supply failure detecting signal PFR of first power supply voltage Vcc1 is connected to the output of output main amplifier circuit 3ai. When second power supply voltage Vcc2 is applied without first power supply voltage Vcc1 being supplied, the gates of driving transistors Q1 and Q2 are fixed to ground potential in response to the signal PFR. Consequently, undesired current consumption is avoided, since a penetrating current does not flow through transistors Q1 and Q2.

REFERENCES:
patent: 4654829 (1987-03-01), Jiang
patent: 4933902 (1990-06-01), Yamada
patent: 4972374 (1990-11-01), Wang
patent: 5047988 (1991-09-01), Mizuta
patent: 5101119 (1992-03-01), Yoshimori
patent: 5132932 (1992-07-01), Tobita

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