VCO control circuit and method of operation
US6952141B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2003 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Jul 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/095
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A VCO control circuit includes a variable delay block, a delay counter, and a tuning range selector coupled to one or more tuning circuits, e.g. one or more VCOs, an arrangement of capacitors, varactor diodes, or inductors. The variable delay block receives a reference signal and a delay signal for setting the delay amount applied to the reference signal, and in response outputs a delayed reference signal, whereby two or more different delays may be applied to the reference signal. The delay counter receives the delayed reference signal and an outputs a delay counter output signal in response. The tuning range selector receives the delay counter output signal, and changes the tuning range of the one or more connected tuning circuits in response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.