Device and method for detecting electric potentials

US10542900B2 · kind B2 · utility

Assignee

• DRÄGERWERK AG & CO. KGAA · DE

Inventors

• Frank Sattler · Wulfen, DE
• Marcus Eger · Stade, DE

Key dates

• Filing date: Jul 2, 2015
• Grant date: Jan 28, 2020
• Expiry date: Nov 18, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03F2203/45521
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device for detecting electric potentials of the body of a patient has measuring electrode inputs (Y1, . . . , Yn) connected with and a plurality of outputs (A1, . . . , An) via amplifiers (Op1, . . . , Opn). A summing unit (13) is connected with the outputs and outputs a mean value of the signals (E1, . . . , En) output by the amplifiers. Common mode signals are removed from the signals (E1, . . . , En) by a subtracting unit (19) which subtracts the output of the summing unit, amplified by an amplification factor (1/β), from at least a portion of the output of the subtracting unit. The output of the subtracting unit is connected with the inputs of the amplifiers. The subtracting unit amplification factor (1/β) and an amplification (β′) of the amplifiers for the output of the subtracting unit are adapted, such that the reciprocal value of the amplification factor (1/β) corresponds to the amplifiers amplification (β′).