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You Are On Multi Choice Question Bank SET 1007

50351. Miller's theorem is used in the high-frequency analysis of BJTs and FETs.



50352. One characteristic of amplifiers is that the sum of the voltage gain and the bandwidth is always constant when the roll-off is –20 dB/decade.



50353. Internal transistor capacitances affect the high-frequency response of amplifiers.



50354. At the cutoff frequency the output is down 20 dB.



50355. The term "dBm" means decibels referenced to 1 mW of power.



50356. Bandwidth is the difference between fcl and fcu.



50357. Coupling and bypass capacitors affect the high-frequency response of an amplifier.



50358. The lower and upper critical frequencies of an amplifier can be determined using the step-response method.



50359. The basis for the decibel unit stems from the logarithmic response of the human ear to the intensity of sound.



50360. Doubling the voltage gain causes a ________ dB ________.





50361. ________ frequencies are values of frequency at which the RC circuits reduce the voltage gain to 70.7% of its midrange value.





50362. A roll-off of 20 dB per decade is equivalent to a roll-off of ________ per octave.





50363. An amplifier has an Rin = 1.2 k. The coupling capacitor is 1 F. Determine the approximate lower cutoff frequency.





50364. Refer to this figure. The output voltage at fcl = 12 mV. What is the output voltage at the midpoint frequency?





50365. Refer to the given figure. What is the output voltage?





50366. If an op-amp comparator has a gain of 100,000, an input difference of 0.2 mV above reference, and a supply of 12 V, the output will be





50367. A comparator with a Schmitt trigger has





50368. Refer to the given figure. Determine the upper trigger point.





50369. In a(n) ________, when the input voltage exceeds a specified reference voltage, the output changes state.





50370. Refer to the given figure. If Vin = 5 V, the rate of change of the output voltage in response to a single pulse input is:





50371. In a flash A/D converter, the priority encoder is used to





50372. What circuit produces an output that approximates the area under the curve of an input function?





50373. An op-amp has an open-loop gain of 90,000. Vsat = ±13 V. A differential voltage of 0.1 V p-p is applied between the inputs. What is the output voltage?





50374. Refer to the given figure. Determine the output voltage.





50375. A good example of hysteresis is a(n)





50376. To reduce the effects of noise resulting in erratic switching of output states of a comparator, you can use





50377. Refer to the given figure. With the inputs shown, determine the output voltage.





50378. Refer to the given figure. Determine the output voltage, VOUT.





50379. What is (are) the necessary component(s) for the design of a bounded comparator?




50380. A bactofuge operates at an average rpm of-----------





50381. What type(s) of circuit(s) use comparators?





50382. A differentiator is used to measure





50383. Refer to the given figure. Determine the lower trigger point.





50384. A(n) ________ amplifier is a summing amplifier with a closed-loop gain equal to the reciprocal of the number of inputs.




50385. ________ is a mathematical process for determining the rate of change of a function.





50386. An integrator circuit





50387. In a comparator with output bounding, what type of diode is used in the feedback loop?





50388. A comparator with hysteresis is sometimes known as a(n)





50389. Which of the following are variations of the basic summing amplifier?




50390. An op-amp integrator uses a capacitor as the feedback element.



50391. An op-amp can be used as a comparator to determine when an input voltage exceeds a certain level.



50392. The output voltage of a summing amplifier is proportional to the sum of the input voltages.



50393. Operational amplifiers are never used as nonlinear devices.



50394. In an op-amp comparator, when the input voltage exceeds a reference voltage, the voltage output changes state.



50395. The R/2R ladder is commonly used for D/A converters.



50396. Bounding allows the output of a comparator to be an unlimited voltage.



50397. The difference between the UTP and the LTP is the hysteresis voltage.



50398. The output of an op-amp comparator will be zero when the input voltage exceeds the reference voltage.



50399. A positive feedback network for hysteresis improves an op-amp comparator's noise immunity.



50400. A Schmitt trigger is





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