Circuit for monitoring a plurality of analog quantities
US4857761A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1988 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R17/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for monitoring a plurality of analog quantities which provides signals for exceeding of threshold values and utilizes a differential amplifier. One input of the differential amplifier is connected to a reference voltage source and the other input is connected to a reference resistor. The quantities to be monitored are represented by voltages or by impressed currents that are supplied to the input of the differential amplifier which is connected to the reference resistor and supplied thereto via decoupling diodes and coupling resistors. A plurality of coupling resistors are connected with reference resistor to form a single voltage divider whose taps receive the representative voltages or, impressed currents and are supplied in graduated steps according to values of the allocated threshold values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.