The amplified output signal is picked up single-ended from preamp and is given to the _________(a) Power Amplifier(b) Lead Selector(c) Pen Motor(d) Paper motorThis question was addressed to me in a job interview.The question is from System Concepts in portion Patient Monitoring System of Biomedical Instrumentation

The amplified output signal is picked up single-ended from preamp and

1.	The amplified output signal is picked up single-ended from preamp and is given to the _________(a) Power Amplifier(b) Lead Selector(c) Pen Motor(d) Paper motorThis question was addressed to me in a job interview.The question is from System Concepts in portion Patient Monitoring System of Biomedical Instrumentation
Answer» Right answer is (a) Power Amplifier Best explanation: The preamplifier is usually a three or four stage differential amplifier having a SUFFICIENTLY LARGE negative current feedback, from the end stage to the FIRST stage, which GIVES a stabilizing effect. The amplified output signal is picked up single-ended and is given to the power amplifier. The power amplifier is GENERALLY of the push-pull differentical type.

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