Circuit arrangement for consecutively monitoring operating conditions of direct current devices
US4327253A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1980 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Sep 8, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/2272
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The circuit arrangement monitors operating conditions of consecutively sampled direct current devices. The operating conditions are represented by different potentials occurring at a sampling connector of each different direct current device. A selector unit has parallel signal inputs, each of which inputs is connected to a respective sampling point of a DC device. A comparator is coupled by a first input to a reference voltage source and by a second input to the output of the selector unit. An output of the comparator is connected to a shift register buffering the output signals of the comparator for one monitoring cycle. The selector unit and the shift register are commonly controlled for synchronous selecting operation and shifting, respectively. There is arranged a feedback network between the output of the shift register and the first input of the comparator for superposing a positive feedback signal on the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.