AC instrumentation amplifier for bioimpedance measurements.
basic_science · Level V
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- Record sourced from PubMed, PMID 8258450.
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Abstract
We analyze the input impedance and CMRR requirements for an amplifier for bioimpedance measurements when considering the capacitive components of the electrode-skin contact impedance. We describe an ac-coupled instrumentation amplifier (IA) that, in addition to fulfilling those requirements, both provides interference and noise reduction, and yields a zero phase shift over a wide frequency band without using broadband op amps.
Medical subject headings
- Amplifiers, Electronic
- Electric Impedance