Ring oscillator having wide frequency range
US8081038B2 · kind B2 · utility
30Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2009 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Nov 18, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00058
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is a ring oscillator having an extended range of oscillation frequency by varactors coupled to delay cells even in a simple structure. The wide frequency range results from simply varying an oscillation frequency by control signals applied to the varactors. Since additional switches connected to the delay cells contribute to increase or decrease of the oscillation frequency range, the ring oscillator can conveniently be employed in various types of oscillation systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.