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To achieve the low frequency response for medical applications, the amplifier configuration must contain?

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in Biomedical Instrumentation by (76.6k points)
To achieve the low frequency response for medical applications, the amplifier configuration must contain?

(a) higher resistance

(b) higher capacitance

(c) lower resistance

(d) lower capacitance

This question was posed to me in an interview.

This is a very interesting question from Smart Sensors in chapter Physiological Transducers of Biomedical Instrumentation

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Correct option is (b) higher capacitance

Explanation: To achieve the low frequency response required for medical applications, the amplifier must have large values of coupling capacitance. In all RC-coupled amplifiers, low frequency response is limited by the reluctance of the coupling capacitors. The response should be down to less than one hertz which is a very frequent requirement.

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