_____________ is employed with resistive transducers which require an external source of excitation.(a) differential amplifier(b) dc bridge amplifier(c) carrier amplifier(d) ac coupled amplifierI had been asked this question in a job interview.This interesting question is from Telemedicine System in section Telemedicine Technology of Biomedical Instrumentation

_____________ is employed with resistive transducers which require an

1.	_____________ is employed with resistive transducers which require an external source of excitation.(a) differential amplifier(b) dc bridge amplifier(c) carrier amplifier(d) ac coupled amplifierI had been asked this question in a job interview.This interesting question is from Telemedicine System in section Telemedicine Technology of Biomedical Instrumentation
Answer» Right choice is (b) dc BRIDGE amplifier To EXPLAIN I would say: ESSENTIALLY, the amplifier comprises a STABLE dc excitation source, a bridge balance and calibration unit, a high gain differential dc amplifier and a dc output amplifier. DC bridge amplifiers are employed with resistive transducers which require an external source of excitation.They can be used as conventional dc high gain amplifiers and offer OPERATING simplicity and high-frequency response.

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