Semiconductor integrated circuit device
US7411805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2005 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Nov 8, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A clock-generating circuit for forming internal clock signals by comparing a signal obtained by delaying, through a variable delay circuit, an input clock signal input through an external terminal with the input clock signal through a phase comparator circuit, and so controlling the delay time of the variable delay circuit that they are brought into agreement with each other, wherein the clock-generating circuit and an internal circuit to be operated by the clock signals formed thereby are formed on a common semiconductor substrate, and an element-forming region in which the clock-generating circuit is formed is electrically isolated from an element-forming region in which the digital circuit is constituted on the semiconductor substrate relying upon the element-isolation technology. The power-source passages, too, are formed independently of other digital circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.