Phase-locked loops
US4069462A · kind A · utility
47Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Dec 13, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A phase synchronizing system having a dual mode of operation for use, for example, with "modified frequency modulation" (MFM) encoded signals wherein captive range is assured by providing a first frequency locking mode of operation wherein a voltage controlled oscillator (VCO) is first locked in frequency to a reference signal and a second phase locking mode of operation wherein the VCO is subsequently locked in phase to an MFM signal independently of the frequency assumed by the latter signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.