Analog Electronics
The input signal for an instrumentation amplifier usually comes from

 a differential amplifier.
 a resistor.
 a Wheatstone bridge.
 an inverting amplifier.

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Analog Electronics
Which of the following statements is false?

A push pull output transformer has a centre-tapped primary
Class AB operation cannot be used for a push pull audio power output phase
All of these
Push pull signals are equal and opposite in phase

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