Question: I am designing the following common emitter amplifier. This is designed with a BC547B transistor.
My design is as follows:
Vcc = 15V, IC = 30ma, VRe = 2.5 V, VRc = 5V, VCE = 7.5V. HfE = about 200, VR2 = 3.2 V.
Ib = 1.5ma, Rc = 166 ohms, Re = 83 ohms, R1 = 7866 ohms, R2 = 2133 ohms. CE = 1uF Cap.
Cout = 47uF and Rl = 50 ohms.
I plug my electric guitar signal into the input and the signal actually comes out, but smaller than just straight from the guitar, measured with my oscilloscope.
I have read many books and none of them really address the issue as to what is the limitation in voltage swing when designing small signal amplifiers as the guitar's is about +- 250mv max with the low E-string. I.E what voltage swing will actually cutoff the base-emitter bias and essentially turn off the transistor.
This does extend as I am trying to amplify an incoming AM RF signal and have been unsuccessful.
Also, of course, any ideas as to why the circuit does not amplify the signal and actually diminishes it?
I'm obviously missing something here and I don't know what it is.