Just for my experiment subject.
Thank you for helping.
Thank you for helping.
MOSFETs don't really have BJT counterparts, since their operational characteristics are so different.
What do you want the BJTs to do?
That amplifier is a mess if intended for audio signals.Thats the schematic diagram for our experiment, my professor, he wants to replace the mosfet with bjt.
As I observe in experiment the irf630 is for positive cycle sine wave and the irf9630 is for negative cycle sine wave.
There aren't counterparts of field effect transistors among junction transistors! They're two entirely different semiconductor topologies! It looks to me like your assignment is to design an equivalent circuit around BJTs which isn't the same as the BJTs being equivalent to the FETs!Just for my experiment subject.
Thank you for helping.
Tnx for that! I knew it couldn't be just me!That amplifier is a mess if intended for audio signals.
Mosfets don't work well in that application - especially without your feedback loop going all the way from the op amp to the mosfet output (which will require more changes).
Yes sir, To amplify audio signal, in our experiment we are using audio generator for our audio input.That amplifier is a mess if intended for audio signals.
Mosfets don't work well in that application - especially without your feedback loop going all the way from the op amp to the mosfet output (which will require more changes).
What are you trying to do? Simply amplify an audio signal?
You say he is a professor. I assume he is not a professor of electrical engineering. What kind of research?Yes sir, To amplify audio signal, in our experiment we are using audio generator for our audio input.
My professor want to replace the mosfet with BJT but the op amp is still there.
And he said that ones we have replace a BJT we need to prove the computation.
what he want is to replace the circuit with transistorize.You say he is a professor. I assume he is not a professor of electrical engineering. What kind of research?
What is the value for transistor and diode sir?Start over and try something like this. It is not perfect but it is simple.
Also, my schematic does not show the +/-12v to power the op amp.
Please use a modern op amp instead of the 741
Also, the bjt need some biasing and help with cross over distortion, hence the diodes and resistors.
Also, I pulled the feedback loop all the way to the output speaker to improve performance.
View attachment 134058
MJF122 and MJF127 - many other Darlington BJT with gain over 1000 and more than 1 amp collector current.What is the value for transistor and diode sir?
YesIf Darlington's transistors are used, then it is probably better to use four diodes, rather than two diodes.
Your prof gave you a bogus starting point! He's either totally inept or he's testing your powers of observation I've met plenty of each so beware!what he want is to replace the circuit with transistorize.
He let us to research for the circuit.
I think he was just plain LAZY and put in two MOSFETS where there were transistors in the original schematic.Your prof gave you a bogus starting point! He's either totally inept or he's testing your powers of observation I've met plenty of each so beware!
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