Drive circuit for a magnetic cassette reader with auto reverse and mute functions
US5506734A · kind A · utility
0Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A drive circuit having two electronic switches formed from N-MOS transistors is designed to alternatively connect the input of a preamplifier stage to a first or second read sensor on the read head of a magnetic tape. The drive circuit also has a third electronic switch formed from an N-MOS transistor which grounds the input of the preamplifier stage. Based on logic input signals, a control circuit switches the first and second switches, or closes the third switch and simultaneously opens the first and second switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.