Patent · US Active

Techniques for varying phase shifts in periodic signals

US8120407B1 · kind B1 · utility

10Cited by

4References

25Claims

0Family size

Assignee

Altera Corporation · US

Inventors

Teng Chow Ooi · Bayan Lepas, MY
Eng Huat Lee · Bukit Mertajam, MY
Chuan Khye Chai · Bukit Mertajam, MY
Yew Fatt Kok · Bukit Mertajam, MY
Sergey Shumarayev · Los Altos Hills, US

Key dates

Filing date	Dec 18, 2009
Grant date	Feb 21, 2012
Priority date	—
Expiry date	Feb 26, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2005/00286
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A circuit includes a phase detection circuit and a phase change circuit. The phase detection circuit compares a phase of a first periodic signal to an input signal to generate a gain signal. The phase change circuit provides phase shifts to the first periodic signal in first and second directions when the gain signal has a first value. The phase change circuit increases phase shifts provided to the first periodic signal in the first direction in response to the gain signal changing from the first value to a second value. The phase change circuit provides phase shifts to the first periodic signal in the second direction when the gain signal has the second value that are smaller than the phase shifts provided to the first periodic signal in the first direction when the gain signal has the second value.

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