Low-cost integrable device for the acquisition of electric signals in compliance with the arnic 429 standard
US5719577A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1996 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Mar 21, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In order to convert an analog signal of digital data transmission into a digital signal, the device embodying the invention comprises a passive analog circuit comprising a capacitor charged by the analog signal via a first resistor, the voltage at the terminals of the capacitor being applied via a second resistor, at the input of a digital circuit comprising a threshold comparator applying, to a flip-flop, a logic signal which is a function of the result of the comparison with a threshold of the voltage at the input, a means for periodically applying at the input a charge or discharge pulse so as to bring the voltage at the input back to the threshold voltage, a counting circuit for periodically determining a number representative of the analog signal, obtained from subtracting the number of discharges from the number of charges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.