Patent · US Active

Single-pin RC oscillator

US7884678B2 · kind B2 · utility

1Cited by

4References

20Claims

0Family size

Assignee

NUVOTON TECHNOLOGY CORPORATION · TW

Inventors

Nir Tasher · Even Yehuda, IL
Tamir Golan · Afula, IL

Key dates

Filing date	Jan 14, 2009
Grant date	Feb 8, 2011
Priority date	—
Expiry date	Jul 20, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH03K4/501
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Apparatus includes a single-pin input interface, which is operative to sense a voltage across a capacitor of a Resistor-Capacitor (RC) network in which the capacitor is repetitively charging and discharging so that the voltage oscillates as a function of time. A measurement circuit is coupled to measure time durations in which the capacitor is charging and in which the sensed voltage lies between first and second predefined thresholds. A clock generation circuit is coupled to generate an output clock signal having a frequency, and to adjust the frequency responsively to the measured time durations.

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