Integrated circuit for recording and playback of such recording
US4266254A · kind A · utility
7Cited by
5References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1979 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | May 7, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/183
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This disclosure describes a recorder/playback system which utilizes a silicon chip having bipolar transistors. One feature is an integral electronic switching arrangement which permits silent and smooth change from the record to the playback mode and vice versa by operation of an external single pole switch. Other features include a circuit for driving a recording level meter, an automatic audio level control circuit (ALC) and integral voltage and current regulators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.