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You Are On Multi Choice Question Bank SET 1026

51301. The midrange open-loop gain of an op-amp is 135 dB. With negative feedback this gain is reduced to 72 dB. The closed-loop gain is





51302. Press Freedom Day is?





51303. Refer to the given figure. Find the midrange gain of this op-amp amplifier.





51304. He had prepared well, but he did not ......... his examination.?





51305. What is the level of the current through the amplifier input(s) to ground in an op-amp?





51306. Open-loop voltage gain of an op-amp can range up to ________.





51307. At what input voltage level does the output voltage level become numerically equal to the value of the common-mode gain of the amplifier?





51308. Refer to the given figure. The unity-gain bandwidth of this op-amp is 10.4 kHz. What is the bandwidth of the circuit?





51309. Which of the following is (are) the result of gain reduction by a feedback?





51310. The common-mode rejection ratio (CMRR) is defined by ________.





51311. ________ is the unit for the slew rate, SR.





51312. An operational amplifier has a ________ input impedance and a ________ output impedance.





51313. Inverting amplifier connection is more widely used because it has ________.





51314. An operational amplifier is a ________ gain and ________ bandwidth differential amplifier.





51315. The ratio of the unity-gain frequency to the cutoff frequency is numerically equal to the level of ________.





51316. In double-ended (differential) input operation, ________.





51317. If two opposite-polarity input signals are applied, the operation is referred to as ________.





51318. If the same input is applied to both inputs, the operation is called ________.





51319. In a differential amplifier circuit, if an input signal is applied to either input with the other input connected to ground, the operation is referred to as ________.





51320. Ideally, the value of the CMRR is ________. Practically, the ________ the value of CMRR, the better the circuit operation.





51321. As the frequency increases, the input impedance of an op-amp ________ and the output impedance ________.





51322. When both input signals are the same, a common signal element due to the two inputs can be defined as the ________ of the two signals.





51323. The feedback component of an integrator is a(n) ________.





51324. A ________ differential amplifier is particularly well suited for battery operation due to its low power consumption.





51325. The maximum frequency at which an op-amp may operate depends on the ________.





51326. An IC unit containing a differential amplifier built using both bipolar and FET transistors is referred to as a ________ circuit.





51327. An ideal op-amp circuit has ________input impedance, ________ output impedance, and ________ voltage gain.





51328. An IC unit containing a differential amplifier built using opposite-type MOSFET transistors is referred to as a ________ circuit.





51329. An input applied to either input terminal will result in ________.





51330. As the supply voltage increases, the voltage gain of the circuit ________ and the power consumption ________.





51331. The output signal of an op-amp is ________ out of phase with its input signal connected to the inverting input terminal.





51332. The output offset voltage is determined by ________.





51333. In a differential connection, the signals that are opposite at the inputs are ________ amplified, and those that are common to the two inputs are ________ amplified.





51334. The ________ amplifier is the most widely used constant-gain amplifier circuit.





51335. The main feature of the differential amplifier is the ________ gain when opposite signals are applied to the inputs as compared to the ________ gain resulting from common inputs.





51336. An inverting amplifier has an input impedance equal to the feedback resistor Rf.



51337. Closed-loop gain is the gain with negative feedback.



51338. Negative feedback decreases the bandwidth and increases the voltage gain.



51339. A good op-amp has low voltage gain, low output impedance, and high input impedance.



51340. A non-inverting amplifier has a higher input impedance and a lower output impedance than the op-amp itself (without feedback).



51341. All practical op-amps have input bias currents and voltages that produce output error voltages.



51342. When the open-loop gain of an op-amp is reduced by negative feedback, the bandwidth is increased.



51343. Open-loop gain of an op-amp is the voltage gain without feedback.



51344. Open-loop gain is always smaller than closed-loop gain.



51345. The common-mode rejection ratio (CMRR) is a measure of an op-amp's ability to reject common-mode input signals.



51346. In which of the following are operational amplifiers (op-amps) used?





51347. Refer to this figure. If the value of R1 decreases, the voltage gain will ________ and the input impedance will ________.





51348. Refer to this figure. The purpose of R3 is





51349. A voltage-follower amplifier comes to you for service. You find the voltage gain to be 5.5 and the input impedance 22 k. The probable fault in this amplifier, if any, is





51350. For an op-amp having a slew rate SR = 5 V/ms, what is the maximum closed-loop voltage gain that can be used when the input signal varies by 0.2 V in 10 ms?





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