Method and apparatus for derivative controlled phase locked loop systems
US6300838A · kind A · utility
12Cited by
21References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Dec 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/093
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An analog phase lock loop circuit having derivative control. The phase lock loop includes a phase detection circuit, main charge pump, a low pass filter, and a voltage controlled oscillator. The derivative control receives error signals from the phase detection circuit and outputs a derivative voltage to the voltage controlled oscillator to be included with the proportional and integral control of the low pass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.