Amplitude limiting circuit for a crystal oscillator
US9054637B1 · kind B1 · utility
11Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2014 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jan 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0094
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplitude limiting circuit for a crystal oscillator circuit includes a current source configured to supply drive current to the crystal oscillator circuit and a current sensing circuit configured to sense operating current in an inverting transistor of the crystal oscillator circuit. The current comparison circuit functions to compare the sensed operating current to at least a reference current and generate an output signal. A current control circuit generates a control signal for controlling operation of the current source in response to the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.