Power-up and enable control circuits for interconnection...

Details Power-up and enable control circuits for interconnection... Power-up and enable control circuits for interconnection...

2006-02-07

2006-02-07

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Tri-state

With field-effect transistor

C326S047000

Reexamination Certificate

active

06995584

ABSTRACT:
Area-efficient power-up and enable control circuits useful in PLD interconnection arrays. A control circuit can include a driver circuit, first and second pull-ups, and first and second pull-downs. The driver circuit has an output terminal coupled to a control circuit output terminal. The first and second pull-ups are coupled in series between the control circuit output terminal and power high. The first pull-up has a gate terminal coupled to an enable terminal. The second pull-up has a gate terminal coupled to a pull-up control terminal. The first and second pull-downs are coupled in parallel between the control circuit output terminal and ground. The first pull-down has a gate terminal coupled to the enable terminal. The second pull-down has a gate terminal coupled to a pull-down control terminal. In other embodiments, the first and second pull-ups are coupled in parallel, and the first and second pull-downs are coupled in series.

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