A certain inverting amplifier has a closed-loop voltage gain of 25. The Op-amp has an open-loop voltage gain of 100,000. If an Op-amp with an open-loop voltage gain of 200,000 is substituted in the arrangement, the closed-loop gain________________? A. doubles…

The use of negative feedback ________________? A. reduces the voltage gain of an Op-amp B. makes the Op-amp oscillate C. makes linear operation possibleD. answers (A) and (B)

A certain OP-amp has bias currents of 50 µA. The input offset current is_________________? A. 700 nA B. 99.3 µA C. 49.7 µA D. none of these

If the feedback resistor in Q15 (above question) is open, the voltage gain ____________? A. increases B. decreases C. is not affected D. depends on Ri

A voltage follower _____________? A. has a voltage gain of 1 B. is noninverting C. has no feedback resistorD. has all of these

The input offset current equals the_____________? A. difference between two base currents B. average of two base currents C. collector current divided by current gain D. none of these

The tail current in a differential amplifier equals ______________? A. difference between two emitter currentsB. sum of two emitter currents C. collector current divided by current gain D. collector voltage divided by collector resistance

A common-mode signal is applied to ________________? A. the noninverting input B. the inverting inputC. both iputs D. top of the tail resistor

The input stage of an Op-amp is usually a ________________? A. differential amplifier B. class B push-pull amplifier C. CE amplifier D. swamped amplifier

Current cannot flow to ground through _______________? A. a mechanical ground B. an a.c. groundC. a virtual ground D. an ordinary ground