Input buffer circuit capable of corresponding to variation of op

Details Input buffer circuit capable of corresponding to variation of op Input buffer circuit capable of corresponding to variation of op

1994-12-19

1996-07-02

Westin, Edward P.

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 17, 326 71, 326 87, H03K 190175, H03K 1901

Patent

active

055326200

ABSTRACT:
An input buffer circuit for converting a TTL(TTL:Transistor transistor logic) level signal supplied from an outside into an internal CMOS level signal. The input buffer circuit comprises a power voltage terminal supplied with a power voltage, a power voltage sensing signal generator for detecting a level of the power voltage by inputting as source power the power voltage supplied to the power voltage terminal and for outputting a power voltage sensing signal respondent to the detected level, and switching means for convening an external signal into an internal signal and for performing an switching operation in response to a level of the power voltage sensing signal positioned on an output path to output the convened signal.

REFERENCES:
patent: 4965469 (1990-10-01), Kondoh et al.
patent: 5343086 (1994-08-01), Fung et al.
patent: 5418476 (1995-05-01), Strauss
"Variable Vcc Design Techniques for Battery Operated DRAMs", 1992 Symposium on VLSI Circuits, pp. 110-111.

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