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Subjects -> Electrical and Computer Engineering -> Electrical and Electronic Circuits -> Posting #54727
Electrical and Computer Engineering, Electrical and Electronic Circuits
Year 1
Microelectric Circuits 7
Please check my work and if incorrect give me the correct answer
A shunt regulator utilizes a zener diode whose voltage is 5.1V at a current of 50 ma and whose incremental resistance is 8 ohms. The diode is fed from a supply of 12 V nominal voltage through a 220 ohm resistor. What is the output voltage at no load?
a. 4.8 V
b. 4.88 V
c. 4.96 V
d. 5.1 V
V2=6.8
I2=50mA
R2=8
Vt=12
R=220
I2=(12-6.8)/(220+8)=5.2/228=22.8
V0=V20+I2rz
6.8+.0228*8=5.28
D is the answer
By OTA: Kishore V.C., PhD (IP)
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Micro-Electric Circuits 1 - Please check my work and give me the correct answer if it is incorrect:
An amplifier has a voltage gain of 50 V/V and a current gain of 500 A/A. What is the power gain in decibels?
a. 4.398
b. 8.795
c. 43.98
d. 87.95
my answer:
50*500=25000
10log250000=43.98
Thus "a" is correct.
Microelectric Circuits 4 - Please check my work and if incorrect give me the correct answer
Please see the attached file for the problem. (Use the superposition principle to find the output voltage of the circuit shown below.)
My solution is:
Superposition principal states that the total response is the sum of the responses to each independent source individually
rt=r1+r2+L+rn
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Microelectric Circuits 9 - Please check my work and if incorrect give me the correct answer
Please refer to the problem stated in the attached file.
(For the circuit shown below, find the values for Re and Rc to establish a collector current of 0.6 mA and a reverse-bias voltage on the collector-base junction of 2.2 V. Assume alpha is approximately equal to 1.)
My answer is given below:
...
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