Modulator for use in an interface between a digital signal processing apparatus and an audio tape deck
US4351008A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1980 |
| Grant date | Sep 21, 1982 |
| Priority date | — |
| Expiry date | Jan 24, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0682
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved modulator is capable of facilitating recording and reproducing on and from an audio cassette tape digital signals such as programs and numerical data coming from digital signal processing apparatus including an electronic cash register as well as providing safety for the audio cassette tape when in operation. The modulator includes a control circuit for detecting and counting carrier signals and outputting desired information in response to a data transfer instruction and a state detector governed by the control circuit wherein the carrier signals are sent out via data transfer lines when the detector is in a specific state. The control circuit may be implemented with a microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.