Input-switching voltage-controlled oscillator and PLL-controlled oscillator
US6791421B2 · kind B2 · utility
7Cited by
5References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Oct 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/099
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A PLL-controlled oscillator that can be suitably used for such purposes as a jitter filter in an optical transmission system includes an input voltage-switching control oscillator as a voltage-controlled oscillator (VCO). The input voltage-switching control oscillator includes: an oscillation closed loop that is provided with a variable-voltage capacitance element; and a switch for interchangeably selecting one of a plurality of voltages in accordance with a selection signal and applying the selected voltage as a control voltage to the variable-voltage capacitance element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.