Current sensor and measurement device
US11050401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2020 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Mar 11, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Technology includes a current sensor that detects electric current flowing through an object. The current sensor includes a magnetic core through which the object is inserted, a coil wound around the magnetic core, a transmission line that transmits electric current supplied from the coil, a terminating resistor that converts electric current from a terminating end of the transmission line into voltage and outputs the voltage, and an impedance matching unit that implements impedance matching between the coil and the terminating resistor. The impedance matching unit raises, to a characteristic impedance of the transmission line, at least one of an impedance viewed from the terminating end of the transmission line toward the terminating resistor and an impedance viewed from a starting end of the transmission line toward the coil, in a band of frequency components involving amplitude attenuation among frequency components of the voltage output from the terminating resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.