Ultra low noise crystal oscillator circuit
US5063358A · kind A · utility
15Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1990 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Nov 1, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/004
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An ultra low noise oscillator circuit including a crystal and having two outputs. At the two outputs, the signal is correlated and the noise outside of the crystal bandwidth is decorrelated. Summing the two outputs in a hybrid circuit significantly reduces oscillator phase noise by almost 3 dB. In addition, these outputs can be used to perform a single oscillator noise test on the oscillator or crystal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.