The effect of current feedback is known as stabilizing idle current and decreasing
distortion.
Draw a graph when current feedback is on.
When bias is 0.65V and current feedback off, Ic varies area of C as to input of A.
And when bias is 2V and with Re of 350Ω, Ic varies area of C as to input of B.
This means gm decreased.
Plot point of Ic as to input voltage.
This appears as if the curve is elongated horizontally.
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