Patent · US Expired

Clock generator and phase comparator for use in such a clock generator

US5877641A · kind A · utility

19Cited by

10References

21Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Horst Ziegler · Berlin, DE
Horst Diewald · Freising, DE
Franz Prexl · Niederding, DE
Erich Bayer · Straubing, DE

Key dates

Filing date	Dec 9, 1994
Grant date	Mar 2, 1999
Priority date	—
Expiry date	Dec 9, 2014

Classification

Technology area (CPC H)Electricity
CPC primaryH03L7/0997
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A clock generator contains a reference oscillator (10), a digital closed delay chain (12), a digital frequency divider (14) and a digital phase comparator (16). The frequency divider (14) is connected between the output of the adjustable delay chain (12) and one input of the phase comparator (16). The output of the reference oscillator (10) is connected to a further input of the phase comparator (16). Between the output of the phase comparator (16) and the delay chain (12) a digital up-down counter (18) is connected, the counting direction of which is determined by the output signal of the phase comparator (16) and by means of which the corresponding length of the delay chain (12) is adjustable.

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