Self-oscillation circuit
US9742417B1 · kind B1 · utility
0Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 10, 2016 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Feb 10, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L5/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-oscillation circuit includes a vibration unit having a vibrator, a positive feedback path which positively feeds back a signal based on vibration of the vibrator to the vibration unit, a negative feedback circuit which generates a pulse-width-modulated signal having a frequency lower than a vibration frequency of the vibrator, based on a comparison result between a value corresponding to an amplitude of the vibrator and a reference value, and a switch circuit which switches connection and disconnection of the positive feedback path to the vibration unit by the pulse-width-modulated signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.