title: Bootstrapped two-electrode biosignal amplifier.
abstract: Portable biomedical instrumentation has become an important part of diagnostic and treatment instrumentation. Low-voltage and low-power tendencies prevail. A two-electrode biopotential amplifier, designed for low-supply voltage (2.7-5.5 V), is presented. This biomedical amplifier design has high differential and sufficiently low common mode input impedances achieved by means of positive feedback, implemented with an original interface stage. The presented circuit makes use of passive components of popular values and tolerances. The amplifier is intended for use in various two-electrode applications, such as Holter monitors, external defibrillators, ECG monitors and other heart beat sensing biomedical devices.
authors.affiliation: Centre of Biomedical Engineering Ivan Daskalov, Bulgarian Academy of Sciences, Acad. G. Bonchev str., Block 105, 1113, Sofia, Bulgaria. dobri@clbme.bas.bg
authors.forename: Dobromir Petkov
authors.initials: DP
authors.lastname: Dobrev
authors.forename: Tatyana
authors.initials: T
authors.lastname: Neycheva
authors.forename: Nikolay
authors.initials: N
authors.lastname: Mudrov
mesh_terms: D000669:Amplifiers, Electronic; D004568:Electrodiagnosis / Q000295:instrumentation; D004582:Electronics, Medical / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans