Low-power oscillator
US8106715B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2009 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Feb 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/3545
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In order to decrease the temperature sensitivity of an oscillator output, and obtain a frequency of oscillation that remains stable over variations in temperature, two oscillators may be configured with identical comparators and logic circuitry, but having different oscillation frequencies. The different oscillation frequencies may be achieved by configuring each oscillator with a respective resistor divider circuit configured to adjust the reference voltage at the reference input of the respective comparator. The difference between the respective periods of oscillation of the two oscillators may therefore become independent of the comparator delay, and may only depend on temperature sensitivity of the resistor. The output of one oscillator may be used to calibrate/adjust the output of the other oscillator based on the difference between the respective periods of oscillation of the two oscillators, due to the difference between the respective periods of oscillation of the two oscillators remaining substantially independent of variations in temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.