Phase-lock oscillator
US4390910A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1981 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Jan 30, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A phase-lock oscillator for use in conjunction with a rotatable servo surface having a servo encoding scheme of timing information and position-indicating-information, including a VCO, a phase-frequency detector, responsive to two input signals, for generating a phase and frequency error signal to control the output frequency signal of the VCO, and a control circuit for generating the two input signals in response to the timing information and output frequency signal, the control circuit being substantially digital and having passive delay lines of short delay and having a lock detector to indicate acquisition or loss of synchronization of the phase-lock oscillator with the timing information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.