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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 9
46.
In a one pole active low pass filter, the cut off frequency is fc. Then
gain decreases at the rate of 20 dB per decade increase in frequency above fc
gain decreases at the rate of 20 dB per decade decrease in frequency below fc
gain decreases at the rate of 40 dB per decade increase in frequency above fc
gain decreases at the rate 40 dB per decade decrease in frequency below fc
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Turn off time of a transistor switch is equal to (where ts is storage time and tf is fall time.)
ts + tf
ts - tf
2ts
2tf
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
In a CE amplifier circuit the emitter by pass capacitor is remove. The ac output voltage
increases
remains the same
increases or decreases
decreases
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
In a differential amplifier, CMRR can be improved by using an increased
emitter resistance
collector resistance
power supply voltages
source resistance
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
If ac resistance of diode is re, then In CE, BJT amplifier the input impedance is
re
β re
(βre)2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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