Oscillator and oscillator adjustment method with stepwise delay
US6603363B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Oct 16, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00097
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There are provided the delay coarse adjustment circuit 3, the delay fine adjustment circuit 4, and the inverter circuit 5. The delay coarse adjustment circuit 3 stepwise varies a delay amount based on the delay coarse adjustment signal S11 and supplies the input oscillation signal S12 with a coarse delay. The delay fine adjustment circuit 4 stepwise varies a delay amount based on the delay fine adjustment signal S2 and supplies the input oscillation signal S13 with a fine delay which is smaller than a delay amount supplied by the delay coarse adjustment circuit 3. The inverter circuit 5 inputs the oscillation signal S14 from the delay coarse adjustment circuit 3 or the delay fine adjustment circuit 4. The delay coarse adjustment circuit 3 coarsely adjusts delays. The delay fine adjustment circuit 4 fine adjusts delays. The coarse and fine adjustments provide a precision delay to generate the oscillation output signal S15. The delay coarse adjustment circuit 3, the delay fine adjustment circuit 4, and the inverter circuit 5 are connected in a ring for stepwise controlling an oscillation signal's oscillation frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.