Multiple feedback loop ring oscillator and delay cell
US6094103A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 18, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jun 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0322
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a multiple feedback loop ring oscillator and delay cell with high oscillation voltage. It is an object of the present invention to implement a new ring oscillator for the VCO of a high speed PLL and a proper delay cell with a high speed and low noise. The apparatus is composed of multiple feedback loop ring oscillator that 4 delay cells which have the first main input stage, the second main input stage, the first subsidiary input stage, the second subsidiary input stage, the third subsidiary input stage, the forth subsidiary input stage, the first output stage and the second output stage is connected to the main loop and subsidiary loop. The present invention has advantages that it can be operated in high speed, it has a low power sensitivity, there is no power noise because there is no variation of a supply current and it can improve noise characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.