Design a feedback transresistance amplifier using an op-amp with parameters R i = 10 k Ω , R o = 100 Ω , and a low-frequency open-loop gain of A v = 10 4 to produce a gain of 5 k Ω . The source resistance is R S = 500 Ω and the load resistance is R L = 2 k Ω . Determine the actual gain, input resistance, and output resistance using a computer simulation.
Design a feedback transresistance amplifier using an op-amp with parameters R i = 10 k Ω , R o = 100 Ω , and a low-frequency open-loop gain of A v = 10 4 to produce a gain of 5 k Ω . The source resistance is R S = 500 Ω and the load resistance is R L = 2 k Ω . Determine the actual gain, input resistance, and output resistance using a computer simulation.
Solution Summary: The author illustrates the required circuit for the transistor feedback transresistance amplifier by the use of op amp.
Design a feedback transresistance amplifier using an op-amp with parameters
R
i
=
10
k
Ω
,
R
o
=
100
Ω
,
and a low-frequency open-loop gain of
A
v
=
10
4
to produce a gain of
5
k
Ω
.
The source resistance is
R
S
=
500
Ω
and the load resistance is
R
L
=
2
k
Ω
.
Determine the actual gain, input resistance, and output resistance using a computer simulation.
A triangular wave is applied to the input of Fig. (3). Determine what the output should
be and sketch its waveform in relation to the input.
10μs.
0
5μs
15 μs
0.001 μF
R₁
w
2.2k
A three-phase, 480-V, 60-Hz, 6-pole, Y-connected induction motor has its speed controlled by slip power. The circuit parameters are given:
Rs=0.06 ohms, Rr=0.05 ohms, Xs=0.2 ohms, Xr=0.3 ohms and Xm=6 ohms. The turn ratio of the rotor to stator winding is n=0.8. The no-load
losses of the motor are equal to 150 W. The rotor and stator cupper losses are equal to 249.21 W. The slip power losses are estimated to
8000W. The load torque is 173.61 N.m. at 700 rpm. The efficiency is equal to:
Select one:
a. 71.5%
b. None of these
c. 81.5%
d. 91.5%
Question 2
Consider a 3-phase, 460-V, 100-hp, 0.88 power factor lagging, 4-pole, 1728 RPM, 60 Hz, Y-connected induction motor. The operating slip is
equal to:
Select one:
a. 0.05
b. 0.01
c. 0.04
d. None of these
Question 3
A 3 phase, 10 kW, 1750 rpm, Y- connected 460 V, 60 Hz, 4 poles, Y-connected induction motor has the following parameters: Rs = 0.5 Ohms,
Rr = 0.3 Ohms, Xs = 0.9 Ohms, Xr = 0.9 Ohms, Xm = 25 Ohms. The no load…
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