Patent · US Active

Circuit arrangement for suppressing common-mode interference signals during the measurement of bioelectric signals

US9717431B2 · kind B2 · utility

2Cited by

10References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Ulrich Batzer · Spardorf, DE
Peter Greif · Cologne, DE
Harald Karl · Bad Mergentheim, DE

Key dates

Filing date	Oct 1, 2015
Grant date	Aug 1, 2017
Priority date	—
Expiry date	Oct 9, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG01R19/10
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A differential voltage measuring system includes two electrodes that are connected to a patient at an input and make available a respective measurement contact at an output. A shunt resistor is connected in series with the second electrode. A first amplifier circuit has a first input for a first signal from the first electrode, a second input for a second signal from the second electrode, and an output. A second amplifier circuit has a first input that is connected in series with the shunt resistor, a second input that is connected in parallel with the shunt resistor, and an output. A first signal detection unit is provided at the output of the first amplifier circuit, and a second signal detection unit is provided at the output of the second amplifier circuit. The second signal detection unit detects the signal from the second amplifier circuit as a measurement variable.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.