Circuit arrangement for monitoring an output load
US6278390A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1999 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Mar 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1076
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for monitoring an output load (4) of a digital-to-analog current converter (1). The digital-to-analog converter supplies an analog output current dependent on a digital comparison data word to a first resistor (2) and, if present, to the output load (4) arranged in parallel with the first resistor. In order to provide a continuous monitoring of the output load, a digital first comparator (12) compares the data words applied to the digital-to-analog current converter (1) with at least one comparison data word. An analog second comparator (5) compares the voltage drop across the first resistor with at least one reference voltage and applies its output signal to a flip-flop (8). A comparison circuit (11) monitors the magnitude and/or the presence of the output load dependent on the output signals of the first comparator and the flip-flop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.