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Electronics and Communication Communication Systems Difficulty: Medium

The data sheet for a certain JFET ( Junction Field Effect Transistor) indicates that I DSS (drain to source current with gate shorted) = 15 mA and V GS(off) (Cut-off value of gate to source voltage) = -5V. What is the drain current for V GS = -2V? Let $$X\left( {{e^{j\omega }}} \right) = \sum\nolimits_{n = - \infty }^\infty {x\left[ n \right]{e^{ - j\omega n}}} $$ and $$x\left[ n \right] = \frac{1}{{2\pi }}\int\limits_{ - \pi }^\pi {X\left( {{e^{j\omega }}} \right){e^{j\omega n}}d\omega } .$$ If $$X\left( {{e^{j\omega }}} \right) = \frac{1}{{\left( {1 - 0.2{e^{ - j\omega }}} \right)\left( {1 - 0.1{e^{ - j\omega }}} \right)}},$$ what is x[n] in terms of unit discrete step function u(n)? Entropy of a random variable is Determine whether the following statements are true or false with respect to Pulse Amplitude Modulation. 1. Instantaneous sampling of the message signal m(t) every T s seconds, where the sampling rate $${{\text{f}}_{\text{s}}} = \frac{1}{{{{\text{T}}_{\text{s}}}}}$$ is chosen in accordance with the sampling theorem. 2. Lengthening the duration of each sample obtained to some constant value T How is memory accessed in RISC architecture?