Data processor for recording and reading out check data and true data in a cassette tape
US4360842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1981 |
| Grant date | Nov 23, 1982 |
| Priority date | — |
| Expiry date | Feb 6, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data reader reads data from a magnetic tape using a reproduction head. This data is presented to a loading control circuit which amplifies the signal produced by the reproduction head, as needed. The sufficiency of the volume level produced by the loading control circuit is detected by a volume adjustment detection circuit which detects the sufficiency of the signal level. If the signal level is insufficient, a buzzer is sounded indicating to the operator of the data reader that the gain level of the loading control circuit is insufficient. If the gain level is determined to be sufficient by the volume adjustment detection circuit, a signal path to a data detection circuit is enabled. The data detection circuit determines the presence of actual data and presents this data to a readout circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.