Self calibrating RC oscillator
US7498884B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2007 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Aug 21, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is disclosed a self-calibrating resistor-capacitor (RC) oscillator in which a resistor has a resistance value varied minimally by temperature change and process variation, a capacitor has a capacitance value selected adequately according to needs, and the resistor and capacitor are configurable as a one-chip by a complementary metal-oxide semiconductor (CMOS) process. The self-calibrating RC oscillator comprises a resistor part including a first resistor having a resistance value reduced with increase in temperature and a second resistor connected in series with the first resistor and having a resistance value increasing with increase in temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.