Power supply system of a device designed to cooperate with a removable electronic medium such as a card and device equipped with such a system
US4538058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1983 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Apr 20, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a power supply system for a device designed to cooperate with a portable electronic medium, e.g., a credit or identification card having integrated electronic circuits therein. This system comprises a main power supply circuit (5a) that applies at least one voltage (V) to a processing unit (3) by means of a main supply source (6a) and an auxiliary backup supply circuit (5b) by means of an auxiliary supply source (6b). A detector circuit (7) detects any anomaly of the main source (6a) and automatically connects the auxiliary source (6b) in order to apply the voltage (V) to the unit (3). The invention is more particularly applicable to the supply of a transaction terminal or unit which cooperates with portable electronic mediums, e.g., credit or identification cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.