Patent · US Active

Calibration of voltage controlled oscillators

US7603244B2 · kind B2 · utility

3Cited by

2References

7Claims

0Family size

Assignee

ZeroG Wireless, Inc. · US

Inventors

Stanley Bo-Ting Wang · Cupertino, US
Bendik Kleveland · Santa Clara, US
Thomas H. Lee · Cupertino, US

Key dates

Filing date	Jul 10, 2008
Grant date	Oct 13, 2009
Priority date	—
Expiry date	Jul 10, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH03L7/099
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A calibration circuit (20, 50) and method (60) for calibrating the bias current of a VCO (10, 40) to minimize phase noise. The calibration circuit (20, 50) monitors the average voltage at the common-mode node of the VCO (10, 40) while varying the bias current over a predetermined range. The calibration circuit (20, 50) identifies the bias current associated with the minimum average common-mode voltage and utilizes this bias current for calibrating the biasing transistor of the VCO (10, 40).

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