I already thought to a Common Emitter Amplifier , 2 stages, maybe , but the problem is that I don’t Really know What TBJ to use . What characteristics I m looking for ?Use a microphone preamp (transistors or opamp) with an audio power amp IC driving a transformer.
But a suitable audio transformer is probably not made anymore so you will need to design a transistor amplifier to produce the 27V (77V p-p) output.
You will need a power supply with about 82VDC output.
BJT , sorry . TBJ is in my language .))What is a "TBJ"?
The output power of 27V into 16 ohms is 46W. A common emitter class-A stage will get extremely hot all the time even when there is no input signal. You need a complementary class-AB pair of emitter followers plus at least two transistor common emitter amplifiers.
Then you're looking at power supplies of +/-39 Vdc for the output waveform, plus some headroom for the output transistors, so somewhere around +/-45 Vdc at a minimum of 2.4 Apeak.27 V RMS . The load must be Connected to Ground , I think .
My bad,sorry. I will follow your advice .I speak in words, not letters. A Bipolar Junction Transistor is clear in any language. An Opamp is also very clear but OA could be anything.
The output current of almost all opamps is way too low for a 16 ohms load.
As has already been explained, you can't use an opamp for the output, you need a power amp.My bad,sorry. I will follow your advice .
Our teacher said us that is easier to design it with OpAmps . I used 2 stages , first Av=90 and second stage has Av=60. It works ok , I have 27V from 5mV ,but I ignored load resistance . When I place it, the output voltage is limited. How can I solve this ?