Record medium checking device including a circuit for recording a signal on a record medium from detected clock pulses and for selective frequency setting
US5592080A · kind A · utility
1Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1993 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Dec 30, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a record medium checking device, a signal recorded on record medium is reproduced, then the absence of reproduced signal is detected. The device includes a reproducing means for reproducing the signal recorded on the record medium to output the reproduced signal, a discriminating means for comparing the reproduced signal with a reference signal to output a discriminating signal, a signal generating means for generating detecting clock pulses, and a counter to count the detecting clock pulses. The output of the counter is a check signal based on the discriminating signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.