Digitally controlled oscillator and associated method
US7330081B1 · kind B1 · utility
26Cited by
9References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2005 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Sep 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00143
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digitally controlled oscillator circuit is provided that comprises a ring oscillator including multiple inverters; multiple digitally controlled capacitors (DCCs), each coupled to apply a digitally controllable amount of capacitance to an output of a different one of the inverters; and control circuitry operable to change an amount of capacitance applied to each inverter during operation of the ring oscillator and to cause the multiple DCCs to apply substantially the same amounts of capacitance to each of the inverter throughout operation of the ring oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.