And for what project are you doing this design, if not for school?No , I am trying to optimize my design .
Thanks for clarificationBiasing is done with the resistors, not with the capacitors. The resistors in each circuit are the same.
The base in each circuit has a high impedance and the emitters have a low impedance that needs the larger capacitor in both circuits.
In your attachment , both of the circuits were a common emitter !Your biasing caused the severe clipping at the top of the waveform. I changed the biasing a little and reduced the input signal level to reduce the clipping. It is still distorted because it is missing some negative feedback.
The capacitors work fine in the 1MHz MW band.
I was wondering , is there are a differences in biasing between CB & CE circuitsFigure 2 is a linear common base amplifier.
thanks for your concernEDIT.
My error with the gain. The input is at -28dB and the output is at +6dB then the max gain is +34dB which is 50 times.
Please, can you explain that in case of common-base?...base is always input...
well spotted and that was incorrect or at best incomplete.Please, can you explain that in case of common-base?
(By the way - this is correct, but it deserves some explanation...)
Yes - and to be more clear - "biasing at emitter" should mean: Set resp. modify the bias VOLTAGE at the emitter (when the base is DC grounded) because it is the base-emitter voltage that matters. The currents are the result of the voltages Vbe resp. Vce...... the only way to affect or control the input is to change biasing at emitter. ...
Of course, but there is a specific requirement for the base-emitter voltage.There is no requirement for the base to be at any particular DC voltage.