Concept for interfacing a first circuit requiring a first...

Details Concept for interfacing a first circuit requiring a first... Concept for interfacing a first circuit requiring a first...

2006-12-19

2008-07-29

Cho, James H (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S021000, C326S068000

Reexamination Certificate

active

07405591

ABSTRACT:
An apparatus interfaces a first circuit using a first supply voltage and a second circuit using a second supply voltage different from the first supply voltage. The apparatus includes a driver circuit having a driver network comprising driver supply voltage terminals connected to controllable switches. The controllable switches include resistive elements or are separated from resistive elements. A receiver circuit has a receiving network comprising a resistive element and receiver supply voltage terminals and a connection line connecting the driver circuit and the receiving circuit. The controllable switches have two switch configurations, a first switch configuration resulting in a high voltage on the connection line and a second switch configuration resulting in a low voltage on the connection line.

REFERENCES:
patent: 5534812 (1996-07-01), Cao et al.
patent: 6573753 (2003-06-01), Snyder
patent: 7321240 (2008-01-01), Schaefer

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