3.21 P3.21 Determine the steady-state eror for a unit step input, a unit ramp input, and an accelera- tion input /2 for the following unity negative feedback systems. The open-loop transfer functions are given by 50 (0.1s + 1)(2s + 1) 8(0.5s + 1) 3?(0. 1s + 1) 10 s(s+4)(s+0. 5) (a) G(s) = (b) G(s)H(s) = (d) G(s) =+ 1)(s +5) 10 (c) G(s) = %3D k (e) G(s) = %3D s(s²+4s +200)

A signal whose energy is concentrated in a frequency band is often referred to as a bandpass signal. There are a variety of techniques for sampling such signals, generally referred to as bandpass-sampling techniques. To examine the possibility of sampling a bandpass signal as a rate less than the total bandwidth, consider the system shown in Figure Q2(b). Assuming that w₁ > W₂ - W₁, find the maximum value of T and the values of the constants A, wa, and wo such that x, (t) = x(t). r x(t) -W₂ -W₁ 1 -Wb X(jw) X +∞ p(t) = Σ 8(t-nT) (a) Xp (t) p(t) 1 W1 W2 H(jw) T H(jw) A- ola @a Wa (b) Wb w 3 x₁ (t)

Three EMG signals are required to be summed. The first and second signal, EMG1 and EMG2, are required to be scaled by a factor of -4, and the third signal, EMG3, by a factor of -2. Design an Op-amp based circuit to produce the required output operation.

Analogue 2