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Microphone Preamplifier

Microphone Preamplifier
Microphone Preamplifier
Suggestion for project on op-amps....Its a 2nd year electronics course project?

Its a final project of the semester..im in an australian uni studying electrical engineering...What would be the best choice for me ...Thanks
Choices are::
1.An audio frequency integrator, using discrete components
2.An audio frequency differentiator, using discrete components
3.A variable frequency function generator, with sine, triangle and square function outputs, using operational amplifiers
4.An instrumentation amplifier with low noise and high common mode rejection
5.A low noise microphone preamplifier
6.A sharp cut-off, minimal pass band ripple low pass filter
7.A sharp cut-off, minimal pass band ripple high pass filter
8.A narrow band-pass filter
9.A narrow band-stop filter
10.A logarithmicantilog amplifier (used as a multiplier or as a divider)
11.An absolute “peak” detector using Op-amp
12.A three Channel Equalizer

OK, I'm assuming here that you want to demonstrate knowledge and skills in Op-Amp circuit design. Personally, I would pick either 1. or 2., design and construct the circuit using discrete components (DC coupled) amplifier / integrator, or amplifer / differentiator. I would use maybe 3 or 4 transistors, perhaps transistor / FET combination, and diodes. Everything would be DC couple except, of course, for the RC components. Direct coupling would be how the design would be found in an actual Op-Amp.
Of course, you would want to show all of the design factors, parameters, and math. Probably write a short report on the project.



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