Semiconductor integrated circuit having oscillators or oscillation circuits connected to a wiring line at connection points with intervals in length there between
US6922113B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Nov 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The oscillation circuit includes at least two ring oscillation circuits in each of which a plurality of inverters are connected in a ring shape in a multi-stage fashion, and a conductive wiring line. The output of at least one inverter of each of the ring oscillation circuits is connected to the conductive wiring line, whereby the plurality of ring oscillators are caused to oscillate at an identical frequency. A PLL is constructed in such a way that the oscillation circuit obtained by the above means is formed into a voltage-controlled oscillation circuit, and that a phase-frequency comparator, a charge pump circuit and a low-pass filter are employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.