Modulus control loop
US4584538A · kind A · utility
0Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1984 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Jun 28, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/193
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and method is disclosed for operating a modulus control loop of an LSI a phase locked loop integrated circuit (or descrete equivalent) and a dual modulus prescaler at higher frequencies. This is accomplished through the use of a flip flop whose input is the modulus control output from the synthesizer IC and whose clock input is provided by the output of the prescaler. This greatly extends the time available to shift the prescaler modulus control insuring that the control signals will not be missed and increasing the available frequencies that the modulus control loop may operate at.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.