Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2002 Jan;40(1):122-7.
doi: 10.1007/BF02347705.

Two-electrode biopotential amplifier with current-driven inputs

D Dobrev  1 , I Daskalov
Affiliations

Two-electrode biopotential amplifier with current-driven inputs

D Dobrev et al. Med Biol Eng Comput. 2002 Jan.

Erratum in

  • Med Biol Eng Comput 2002 May;40(3):367-8

Abstract

A circuit was developed for a differential two-electrode biopotential amplifier. Current sources at the amplifier inputs were controlled by the common-mode voltage. This principle is well known in telephony for interfacing the telephone line with analogue-type phones. A low impedance of about 1 k(ohm) was obtained between each input and the common point of the circuit. The differential input impedance of 60 M(ohm) was obtained with the use of precision resistors. Considerable reduction in the common-mode voltages of more than 200 times resulted. The circuit can be useful for biosignal acquisition from subjects in areas of very high electromagnetic fields, where high common-mode voltages could saturate the input amplifier stages.

PubMed Disclaimer

References

    1. Med Biol Eng Comput. 1995 Jan;33(1):63-8 - PubMed
    1. IEEE Trans Biomed Eng. 1991 Nov;38(11):1154-7 - PubMed
    1. IEEE Trans Biomed Eng. 1986 Nov;33(11):1043-6 - PubMed
    1. IEEE Trans Biomed Eng. 1983 Jan;30(1):58-62 - PubMed
    1. IEEE Trans Biomed Eng. 1988 Nov;35(11):953-9 - PubMed

LinkOut - more resources