52. A(n) ________ amplifier configuration has an input impedance approximately equal to the input resistor Ri and an output impedance approximately equal to the output impedance of the op-amp itself.
(a) non-inverting (b) inverting (c) voltage-follower (d) any of these
Answer
Answer : (b)
Explanation
Explanation : No answer description available for this question. Let us discuss.
55. A practical op-amp has very ________ input impedance, very ________ output impedance, very ________ open-loop voltage gain, and a ________ bandwidth.
555555555580. Which of the following is (are) the result of gain reduction by a feedback? (a) The amplifier voltage gain is a more stable and precise value. (b) The input impedance of the circuit is increased over that of the op-amp alone. (c) The output impedance is reduced over that of the op-amp alone. (d) All of the above
5555555555198. ______ is NOT a characteristic of an ideal op-amp. (a) Infinite voltage gain (b) Minimum bandwidth (c) Infinite input impedance (d) Zero output impedance
Tags: impedance, amplifier, op-amp, voltage, gain, input, output, electronics, engineering
555555555526. An amplifier has an input signal voltage of 0.054 mV. The output voltage is 12.5 V. The voltage gain in dB is (a) 53.6 dB. (b) 107.3 dB. (c) 231 dB. (d) 116 dB.
Tags: db, voltage, amplifier, input, output, gain, electronics, engineering
555555555541. The input power to a device is 10,000 W at 1000 V. The output power is 500 W, and the output impedance is 100 . Find the voltage gain in decibels. (a) –30.01 dB (b) –20.0 dB (c) –13.01 dB (d) –3.01 dB
Tags: db, output, input, impedance, voltage, gain, electronics, engineering