Patent · US Active

Clock-generator architecture for a programmable-logic-based system on a chip

US7579895B2 · kind B2 · utility

26Cited by

70References

1Claims

0Family size

Assignee

Actel Corporation · US

Inventors

Shin-Nan Sun · Fremont, US
Limin Zhu · Fremont, US
Theodore Speers · San Jose, US
Gregory Bakker · San Jose, US

Key dates

Filing date	Oct 31, 2007
Grant date	Aug 25, 2009
Priority date	—
Expiry date	Mar 28, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2203/45166
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A programmable system-on-a-chip integrated circuit device comprises at least one of a crystal oscillator circuit, an RC oscillator circuit, and an external oscillator input. A clock conditioning circuit is selectively coupleable to one of the programmable logic block, the crystal oscillator circuit, the RC oscillator circuit, and the external oscillator input. A real-time clock is selectively coupleable to one of the programmable logic block, the crystal oscillator circuit, the RC oscillator circuit, and the external oscillator input. A programmable logic block is coupled to the clock conditioning circuit and the real-time clock.

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