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Phase inverter is used in an amplifier in the CRO because ___________

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Phase inverter is used in an amplifier in the CRO because ___________

(a) phase inversion is needed

(b) no phase inversion is needed

(c) it is needed to operate a push pull

(d) it provides voltage stability

The question was posed to me in a national level competition.

This key question is from Simple Oscilloscope in section Oscilloscopes of Electrical Measurements

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Right answer is (c) it is needed to operate a push pull

The explanation: In a Cathode Ray Oscilloscope, phase inverter is typically used for operating a push pull amplifier. It provides two antiphase output signals in order to operate the push pull amplifier.

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