Differential logic level translator circuit with dual output log

Details Differential logic level translator circuit with dual output log Differential logic level translator circuit with dual output log

1993-09-30

1995-06-27

Hudspeth, David R.

Electronic digital logic circuitry

Interface

Logic level shifting

326 78, 326 18, 326125, 326126, H03K 19018, H03K 19086

Patent

active

054283051

ABSTRACT:
Switching between two logic circuits that produce outputs at different respective logic levels is accomplished by means of a common input differential switch that has a branch in each logic circuit. A common current source supplies current to the branches within each logic circuit. The current source remains on regardless of which logic level is selected, thereby enhancing switching speed. The logic circuits produce logic outputs at a common output differential switch, which in turn provides a selected output to a single output terminal. The logic circuits are configured so that the output from the circuit corresponding to the selected logic level dominates the output from the other logic circuit at the output differential switch.

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Digital Integrated Electronics, by H. Taub, Mc-Graw Hill, 1977, pp. 246-249.

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