Disable circuit for a phase locked loop discriminator circuit
US4605908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1985 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Dec 23, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/113
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention consists of an apparatus comprising a phase locked loop and a frequency loop having a discriminator and a disable. The disable is used to electrically disconnect the frequency loop from the phase locked loop when the phase of the output from the voltage controlled oscillator is within a preset range of the incoming signal. The disable acts to provide an adjusting voltage signal, set by the discriminator, to the phase locked loop when the output and input signal phases are out of the preset range. When they are within the preset range the disable outputs a zero voltage regardless of the input from the discriminator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.