Patent · US Active

Programmable current output and common-mode voltage buffer

US7535258B1 · kind B1 · utility

12Cited by

18References

17Claims

0Family size

Assignee

Lattice Semiconductor Corporation · US

Inventors

Phillip Johnson · Hillsboro, US
William B. Andrews · Emmaus, US
Gregory S. Cartney · Coplay, US

Key dates

Filing date	Nov 6, 2006
Grant date	May 19, 2009
Priority date	—
Expiry date	Nov 6, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2203/45681
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A buffer for a programmable logic device has programmable current sink and source circuitry and an independently programmable common-mode voltage reference source. An amplifier, responsive to a common-mode voltage detector and the voltage reference source, forces a common-mode voltage of an output signal from the buffer to approximate the voltage from the common-mode voltage reference source.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.