Clock generator
US4386271A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1981 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Jul 17, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04798
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A clock generator for establishing working clock pulses occurring for constant increments in a scan path of a laser scanner which cyclically sweeps over a record medium at a non-constant velocity includes: a generator of a fiducial pulse at least once per cycle of sweep; a frequency synthesizer responsive to the fiducial pulses for generating radio-frequency clock pulses having a frequency greater than the fiducial pulses, and in synchronization therewith; a storage for storing a plurality of count values, each of the count values being associated with a given increment along the scan path; a working clock pulse generator, including a counter which counts the radio-frequency clock pulses, for emitting a working clock pulse each time the counter counts a count value received by the working clock pulse generator. For each working clock pulse a new count value stored in the storage is transmitted to the working clock pulse generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.