51351. Refer to the given figure. The resonant frequency is controlled by

51352. Refer to this figure. Determine the resonant frequency.

51353. The feedback signal in a(n) ________ oscillator is derived from an inductive voltage divider in the LC circuit.

51354. Given gm = 5000 S, rd = 40 k, R = 10 k, and A = 35. Determine the value of RD for oscillator operation at 1 kHz.

51355. The attenuation of the three-section RC feedback phase-shift oscillator is

51356. Referring to this figure, calculate the voltage gain without feedback for the following circuit values: RD = 4 k, RS = 1 k, RF = 15 k, and gm = 5000 μS.

51357. For a phase-shift oscillator, the gain of the amplifier stage must be greater than ________.

51358. Which of the following is (are) the determining factor(s) of the stability of a feedback amplifier?

51359. What is the minimum frequency at which a crystal will oscillate?

51360. An amplifier with a gain of –500 and a feedback of = –0.1 has a gain change of 15% due to temperature. Calculate the change in gain of the feedback amplifier.

51361. The feedback signal in a(n) ________ oscillator is derived from a capacitive voltage divider in the LC circuit.

51362. Refer to this figure. This circuit is

51363. This circuit is a ________ oscillator.

51364. Sinusoidal oscillators operate with ________ feedback.

51365. Referring to this figure, calculate the voltage gain with the feedback for the following circuit values: RD = 4 k, RS = 1 k, RF = 15 k, and gm = 5000 μS.

51366. Refer to this figure. Calculate the resonant frequency.

51367. Which of the following is required for oscillation?

51368. A circuit that can change the frequency of oscillation with an application of a dc voltage is sometimes called

51369. In order to start up, a feedback oscillator requires

51370. Fill up the blanks using suitable choice: He left the book ......... the telephone.?

51371. Refer to this figure. If C1 increases in value, the resonant frequency will

51372. What is the ratio of the input impedance with series feedback to that without feedback?

51373. The amplifier is unstable if the Nyquist curve plotted encloses (encircles) the –1 point, and it is stable otherwise.

51374. Which of the following oscillators is (are) tuned oscillators?

51375. What is the ratio of the output impedance with series feedback to that without feedback?

51376. Refer to the given figure. This circuit is known as

51377. Who is the first winner of ‘Indira Gandhi Award for International Justice and Harmony’?

51378. Refer to this figure. Determine the frequency of oscillation, if any.

51379. Referring to this figure, calculate the amplification gain where the op-amp gain (A) is 200,000, R1 = 1.5 k, and R2 = 400 .

51380. Referring to this figure, calculate the voltage gain with feedback Avf.

51381. One condition for positive feedback is that the phase shift around the feedback loop must be ________°.

51382. At what phase shift is the magnitude of A at its minimum in the Nyquist plot?

51383. Determine the output impedance with feedback for a voltage-series feedback having A = –100, R1 = 15 k, Ro = 20 k, and a feedback of = –0.25.

51384. Determine the voltage gain with feedback for a voltage-series feedback having A = –100, R1 = 15 k, Ro = 20 k, and a feedback of = –0.25.

51385. Calculate the resonant frequency of this Wien bridge oscillator if R1 = 25 k, R2 = 40 k, C1 = 0.001 F, and C2 = 0.002 F.

51386. The Nyquist plot combines the two Bode plots of gain versus frequency and phase shift versus frequency on a single plot.

51387. Calculate the resonant frequency of this oscillator.

51388. What is the total phase shift requirement, around the feedback loop, for a phase-shift oscillator?

51389. An input signal is needed for an oscillator to start.

51390. Referring to this figure, calculate the amplification gain with feedback for the following circuit values: R1 = 80 k, R2 = 20 k, Ro = 10 k, RD = 61 k, and gm = 4000 μS.

51391. The lead-lag circuit in the Wien-bridge oscillator has a resonant frequency at which the attenuation is

51392. The start-up gain of an oscillator must be ________ one.

51393. Refer to this figure. What is the duty cycle, if any?

51394. In the IC phase-shift oscillator, what should the ratio of feedback resistor Rf to R1 be?

51395. At series resonance, the impedance of a crystal is

51396. For frequencies up to 1 MHz, the ________ is the most widely used type of sinusoidal RC oscillator.

51397. The twin-T oscillator produces a ________ response.

51398. What is the typical value of quality factor for crystal oscillators?

51399. Which of the following improvements is (are) a result of the negative feedback in a circuit?

51400. Taxes paid by a producer on the production of some commodity is:?