Measuring apparatus for measuring a voltage over an isolation barrier and household appliance having the meauring apparatus
US12385955B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2023 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Oct 31, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45604
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring apparatus ascertains measurement information relating to an input voltage. The measuring apparatus contains an operational amplifier having first and second inputs, and an output for providing the measurement information. The measuring apparatus further has a first input node for coupling to a first pole of the input voltage, and a first isolation resistor which connects the first input node to the first input of the operational amplifier. Moreover, the measuring apparatus contains a second input node for coupling to a second pole of the input voltage, and a second isolation resistor which connects the second input node to the second input of the operational amplifier. The measuring apparatus further has a feedback resistor which connects the output of the operational amplifier to the first input of the operational amplifier, and a reference resistor which connects the second input of the operational amplifier to a reference potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.