(a) Specify the type of the negative feedback in the JFET amplifier shown in Fig.
(b)Calculate the voltage gain (V₀/V_i), of the amplifier with no feedback (R_f=$$\infty $$).
(c)Determine the value of the resistance R_f, required to give a voltage gain (V₀/V_i), or - 10.

Companding in PCM systems leads to improved signal - to - quantization noise ratio. This improvement is for

White Gaussian noise is passed through a linear narrow band filter. The probability density function of the envelope of the noise at the filter output is:

The variance of a random variable X is $$\sigma _x^2\,.$$ Then the variance of - kx (where k is a positive constant ) is