Magnetic recording and reproducing apparatus
US4605974A · kind A · utility
11Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1983 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Nov 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording/reproducing apparatus has a rotor drum with a group of rotary magnetic heads mounted thereon, a reproducing amplifier, a recording/reproducing mode switching circuit, a head selection circuit, a control circuit and a DC voltage source. The control signal circuit and the DC voltage source receive a control signal transmitted from a stator drum through a rotary transformer and produce signals for controlling the mode switching circuit and the head selecting circuit and a DC voltage for energizing all the circuits on the rotor drum, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.