Circuit arrangement to detect a voltage
US5537024A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1994 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | Mar 15, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a circuit arrangement to detect a voltage (U), the voltage is applied to the input of a voltage detector (VD) through a voltage divider (R1, R4), the voltage detector (VD) comprising a Schmitt-Trigger with reference voltage and an output driver. The output signal of the voltage detector (VD) is applied to the base of a transistor (T1) whose collector-emitter circuit, together with a series-connected capacitor (Cl), is connected in parallel with the voltage (U) to be detected. The junction of the capacitor (C1) and the transistor (T1) is connected to the input of the voltage detector (VD) through a resistor (R5, R6). The output of the voltage detector (VD) is further applied to the input of a component (C) delivering different output signals in dependence upon whether its input receives a constant signal level or a varying signal level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.