Universal electronic payment terminal base including memory card programming voltage booster
US4920256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Mar 1, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A universal electronic payment terminal base comprising an application and transaction microprocessor (4), with its power supply source (8) and being capable of receiving information identifying memory card holders, and a reader (6) of these cards controlled by the microprocessor (4). The source (8) also serves for programming the cards and delivers a voltage at most equal to the smallest of the programming voltages required. Between the low weight source (8) and the reader (6) a voltage booster (51) is provided for boosting the voltage to a constant level higher than the largest of the programming voltages, and a step by step voltage dropper (53) controlled by a variable cyclic ratio pulse generator (36).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.