Patent · US Expired

Circuit and method for measuring the difference frequency between two clocks

US5848265A · kind A · utility

8Cited by

4References

20Claims

0Family size

Assignee

Cypress Semiconductor Corporation · US

Inventors

Michael Maas · Schnorbach, DE
Bret Alan Oeltjen · Apple Valley, US

Key dates

Filing date	Aug 25, 1997
Grant date	Dec 8, 1998
Priority date	—
Expiry date	Aug 25, 2017

Classification

Technology area (CPC G)Physics
CPC primaryG01R27/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A circuit for measuring the frequency difference between a reference clock and a second clock. The circuit presents a first output in response to a phase crossing between the two clocks. A second circuit presents a second output in response to the first output and the reference clock.

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