Circuit for supplying a reference level to a differential sense

Details Circuit for supplying a reference level to a differential sense Circuit for supplying a reference level to a differential sense

1996-02-20

1998-09-01

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327543, 327143, G05F 110

Patent

active

058015868

ABSTRACT:
A circuit for supplying a reference level to a differential sense amplifier in a semiconductor memory circuit, includes a first circuit for detecting an external power supply voltage, and a second circuit controlled by the first circuit, for controlling a reference level to be supplied to a sense amplifier, on the basis of the result of the detection of the external power supply voltage. Regardless of whether the external power supply voltage is a first power supply voltage (5 V) or a second power supply voltage (3 V), it is possible to output the reference level which can avoid occurrence of malfunction.

REFERENCES:
patent: 4873458 (1989-10-01), Yoshida
patent: 5132565 (1992-07-01), Kuzumoto
patent: 5319601 (1994-06-01), Kawata et al.
patent: 5424629 (1995-06-01), Fujiwara et al.
patent: 5565811 (1996-10-01), Park et al.
patent: 5627493 (1997-05-01), Takeuchi et al.

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