Variable external interface circuitry on programmable logic...

Details Variable external interface circuitry on programmable logic... Variable external interface circuitry on programmable logic...

2008-07-16

2010-02-09

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S037000, C327S093000, C327S309000, C333S08100R

Reexamination Certificate

active

07659745

ABSTRACT:
A programmable logic device (“PLD”) includes circuitry for optionally and variably modifying characteristics of an input signal in any of several respects. Examples of such modifications include AC coupling the signal into the PLD, low pass filtering the signal (with selectable low-pass filter corner frequency), shifting the common voltage of the input signal, and/or subjecting the input signal to a selectable amount of attenuation.

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“Choosing AC-Coupling Capacitors,” Application Note HFAN-1.1, Rev. 0; 9/00, Maxim Integrated Products, Sep. 28, 2000, three pages.

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