Electronic Devices - Power Amplifiers - Discussion
Discussion Forum : Power Amplifiers - General Questions (Q.No. 25)
25.
Refer to the figure. The maximum efficiency of this amplifier is
Discussion:
6 comments Page 1 of 1.
Cleokaze said:
5 years ago
Here, the question asked is what is the maximum efficiency possible.
Now we don't know what is Vce and Ic. And with this circuit, there are three class power amplifiers possible. Class A, B, AB. Out of the three of them, the efficiency of Class AB is highest with 78%. That's it.
Now we don't know what is Vce and Ic. And with this circuit, there are three class power amplifiers possible. Class A, B, AB. Out of the three of them, the efficiency of Class AB is highest with 78%. That's it.
Aileen said:
5 years ago
@Charl How did you get the gain or efficiency.
Charl said:
8 years ago
I think it should be 25% efficiency. Because if you try to compute for the gain it will give you 23.83%. Gain and efficiency have the same formula, Output/ Input.
Shercon said:
8 years ago
At positive cycle before 0.7V the amplifier operates as well as at full negative cycle. Hence half cycle plus during before 0.7, the amp operates since it is not ground. (180° + a little bit less than 180 even 90°).
F fort said:
10 years ago
If the circuit is class AB, the maximum efficiency is 78.5%.
Prajyot kumar mishra said:
1 decade ago
Answer is wrong because it is a class A series fed network whose efficiency is around 25%.
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