Temperature compensated crystal oscillator
US5668506A · kind A · utility
63Cited by
3References
25Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 23, 1996 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | May 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L1/028
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a digital temperature compensated crystal oscillator, ADC circuit and DAC circuit are combined into a data conversion circuit which comprises a first section for DA conversion, a second section for converting an analog temperature voltage signal into a digital form in cooperation with the first section, and a third section for supplementing the DA conversion of the first section and thereby generating an analog control voltage for a VCO from a digital temperature compensation data. There is further provided a switch circuit for connecting the output of the first section to either of the second and third section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.