Delay lock loop having a variable voltage regulator
US6693473B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Mar 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0818
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A delay lock loop circuit includes a forward delay circuit having a plurality of delay elements. Each delay element has a delay time of one unit delay time. The forward delay circuit and each of the delay elements are powered by a supply voltage. The supply voltage is set to thereby set the duration of a unit delay time. Moreover, a feedback delay circuit is provided in order to cause a feedback delay time being substantially equal to a propagation delay of the IC. As the operating conditions of IC change, and the propagation delay thereof increases or decreases, the feedback delay time changes accordingly, and thus the delay caused by forward delay circuit tracks the change in the propagation delay of the IC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.