40 TOP OPERATIONAL AMPLIFIERS Online Test – Questions and Answers 1. How many logic states does an S-R flip-flop have? 2 3 4 5 2. What three subcircuits does a phase locked loop (PLL) consist of? phase comparator, low-pass filter, and VCO phase comparator, bandpass filter, and VCO phase comparator, bandpass filter, and demodulator phase comparator, comparator, and VCO 3. The magnitude of closed-loop voltage gain (Acl) of an inverting amplifier equals: the input resistance the feedback resistance divided by the input resistance the open-loop voltage gain Aol the ratio of the input resistance to the feedback resistance 4. If the feedback/input resistor ratio of a feedback amplifier is 4.6 with 1.7 V applied to the noninverting input, what is the output voltage value? 7.82 V cutoff saturation 9.52 V 5. An output that is proportional to the addition of two or more inputs is from which type of amplifier? difference differentiator summing analog subtractor 6. When a capacitor is used in place of a resistor in an op-amp network, its placement determines: integration or differentiation open- or closed-loop gain saturation or cutoff addition or subtraction 7. An ideal amplifier should have: high input current high output impedance moderate gain zero offset 8. If the input to a comparator is a sine wave, the output is a: ramp voltage sawtooth wave rectangular wave sine wave 9. The input offset current equals the difference between two base currents difference between two base-emitter voltages average of two base currents collector current divided by the current gain 10. The Schmitt trigger is a two-state device that is used for: input noise rejection pulse shaping peak detection filtering Loading … Question 1 of 10
