Method of improving the signal-to-noise ratio in a capacitance electronic disc system
US4575834A · kind A · utility
3Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1982 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Oct 5, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The audio signal-to-noise ratio obtainable in a capacitance electronic disc system which includes a conductive disc formed from a plastic resin containing conductive particles and a playback stylus is increased by spacing the playback stylus at a slight distance from the surface of the conductive disc. This spacing can be attained by depositing a thin coating of a dielectric material on the surface of the conductive disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.