Crystal oscillator circuit
US10425085B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 20, 2017 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Sep 21, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0094
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A crystal oscillator circuit is provided. The crystal oscillator circuit includes an oscillator start-up circuit having a first output terminal and a second output terminal, where the second output terminal outputs a first oscillation signal; and a waveform conversion circuit configured to convert the first oscillation signal to a rectangular wave signal. The crystal oscillator circuit also includes a first current source configured to output a first current to drive the oscillator start-up circuit; and a second current source configured to output a second current, and being connected in parallel with the first current source to jointly drive the oscillator start-up circuit. Further the crystal oscillator circuit includes a pulse generation circuit configured to generate a control pulse signal to control the second current source to output the second current after power on and to stop outputting the second current after a preset time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.