Complementary metal-oxide semiconductor voltage controlled oscillator (CMOS VCO)
US6037842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Apr 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0231
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated circuit complementary metal-oxide silicon (CMOS) voltage controlled oscillator (VCO) includes a plurality of variable delay elements, connected in a ring configuration, each variable delay element including a pair of parallel connected differential CMOS sections. The parallel-connected differential CMOS sections of each variable delay element are controlled by a differential control voltage whose magnitude sets relative levels of operation of the two differential sections of each variable delay element. These relative levels of operation determine the delay through the variable delay element. A current mirror circuit provides the differential control voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.