Magnetic recording and reproducing apparatus with individual correction of amplitude variations of recording currents supplied to plural rotary magnetic heads
US5260843A · kind A · utility
3Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1991 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Feb 6, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/83
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic recording and reproducing apparatus, amplitude errors of recording currents respectively supplied to a plurality of rotary magnetic heads are detected, and, in individual periods of sequential scanning of a magnetic recording medium by the plural rotary magnetic heads, the gain of a variable gain amplifier disposed in a signal recording system sequentially supplying an input video signal to the plural rotary magnetic heads is controlled so as to automatically adjust the value of the recording current supplied to each of the rotary magnetic heads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.