Oscillator having reduced sensitivity to supply voltage changes
US6552622B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Aug 14, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Aug 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0231
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator includes a first sawtooth waveform generator for generating a first sawtooth waveform having a selectively started ramp portion and a second sawtooth waveform generator for generating a second sawtooth waveform having a selectively started ramp portion. A controller is also included for alternatingly controlling the first and second sawtooth waveform generators so that a transition to the ramp portion of one sawtooth waveform is based upon determining the ramp portion of the other sawtooth waveform reaching a trip point. The controller also sets the trip point substantially independent of a supply voltage so that the oscillator has reduced sensitivity to supply voltage changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.