Oscillator circuits and methods that change frequency in inverse proportion to power source voltage
US7030707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2004 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Aug 3, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An oscillator includes a comparison voltage generating circuit, a comparing circuit and a clock switching circuit. The comparison voltage generating circuit is driven by a power source voltage, and generates comparison voltages that change in response to clock signals which have a frequency that varies in inverse proportion to the power source voltage and a first reference voltage. The comparing circuit compares levels of the comparison voltages to a second reference voltage and outputs logic signals having logic levels as a result of the comparison. The clock switching circuit outputs the clock signals which have a frequency that varies in inverse proportion to the power source voltage, in response to the logic signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.