Portable data processing and storage system
US4667088A · kind A · utility
Inventors
Key dates
| Filing date | Sep 22, 1986 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Sep 22, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A credit card size portable system comprises a bubble memory for storage serially of digital data, especially of sound analogue signal which has been digitally encoded including, a decoder means for converting the memory output into analogue form, preferably several decoders each for one sound band, a control register for controlling input and output of data from the memory and which is responsive to control data present in the input and output stream, and input and output for the data entering and leaving the card system. The memory can be of 8 megabyte size, which can record 31/2 minutes of music signal. Optical input can be used, with a photoelectric converter at the input. A card is readily programmed with the digital data and can readily be stored or transported for replay of sound signal as desired, in place of conventional discs or cassettes. The control data bits are detected by the control register and serve to control the recording and replay steps. The digital data may be replayed directly from memory without passing through the decoders for input into another memory upon command from the control register.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.