Patent · US Active

Reference oscillator and its use

US7936227B2 · kind B2 · utility

2Cited by

3References

20Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventor

Phil Young · Grange Park, GB

Key dates

Filing date	May 30, 2008
Grant date	May 3, 2011
Priority date	—
Expiry date	Jun 27, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01S19/35
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A reference clock circuit (170), has a low-power mode, in which the frequency consumption is reduced, and including an internal counter, accumulating time spent in low-power mode. The circuit includes a crystal resonator (60), an oscillator circuit (70), and a temperature compensation circuit (80), providing a stable clock output (85). During low-power mode temperature compensation can be switched off. The circuit further provides a wakeup signal (107) after a preset time in low-power mode.

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