Hi guys
Now I am studying the frequency response of a common emitter amplifier with output coupling capacitor and bypass capacitor. Please refer to the attached image of the Malvino. I read the text several times but I am not 100% certain that I understood in full. What I didn't understood is as follows:
"In the midband of the amplifier ,the emitter is at ac ground, and the voltage is maximum, as shown in fig 16-10b as the frequency decreases to fc, the output voltage decrease to 70.7 per cent of the maximum."
I think that the graph in figure 16-10b have missed the frequency response of the bypass capacitor shown in fig 16-9c , I think at midband frequency, the bypass capacitor is above its cutoff frequency(short) fig 16-9c and when the frequency decreased to fc (of the coupling capacitor Cout 16-10a) the gain is 0.707 of Vmax and the reactive resistance of bypass capacitor high negative feedback increases. Please can someone help me in this!
Thank you for your support
Now I am studying the frequency response of a common emitter amplifier with output coupling capacitor and bypass capacitor. Please refer to the attached image of the Malvino. I read the text several times but I am not 100% certain that I understood in full. What I didn't understood is as follows:
"In the midband of the amplifier ,the emitter is at ac ground, and the voltage is maximum, as shown in fig 16-10b as the frequency decreases to fc, the output voltage decrease to 70.7 per cent of the maximum."
I think that the graph in figure 16-10b have missed the frequency response of the bypass capacitor shown in fig 16-9c , I think at midband frequency, the bypass capacitor is above its cutoff frequency(short) fig 16-9c and when the frequency decreased to fc (of the coupling capacitor Cout 16-10a) the gain is 0.707 of Vmax and the reactive resistance of bypass capacitor high negative feedback increases. Please can someone help me in this!
Thank you for your support
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