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1000 1. The 3-bit Digital to Analog converted (DAC) shown in Figure 1 is the output interface of a digital system. In Figure 1. when b=0.0: when 1, with i = 0.1.2. The DAC parameters are listed in Table 1 Compute the largest (absolute) value Volcan reach and report the digtal input bits required to obtain that output i) For the input waveforms in Figure 2a, draw the Verwaveform (abel all axes). () Adjust the value of the DAC parameter indicated in Table 2 other parameters remain as in Table 1) so that the peak value for mal resulting for the inputs in Figure 21a) varied as indicated in Table 2. Assume this new value to draw the waveform resulting from the input waveforms in Figure 2b) Note: assume OpAmp behaviour to be ideale there is no there's no limitation due to the OpAmp frequency response or OpAmp saturation) 2 1 10 300 TDC per 25 Table 2: DAC parameter Figure 1: DAC mel 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6 7 (2 0 1? 4 5 6 7 MAIL. one 12.567 0 1 2 3 4 5 6 7 Anary two Armut waveform Fordt 13.5 CGSmart o Y U UU EL G H K

4 / 4 100% + 10 b. A conditioning circuit is part of the input interface to a digital system. Figure 3 shows three candidate circuits. Consider the scenarios (l) to (il) listed below, with specific values for Vx, Vz and a given in Table 3. For each scenario consider all circuits in Figure 3: If a circuit can be used to yield the required V, for the given Vz, report the required values for all resistors in the circuit (include all calculations in your answer; if multiple set of resistor values exist that lead to the intended solution, choose one set); If a circuit can't be used explain the reason, Scenario (1) Vi(t) = Vx cos(2*t/T) and Vo(t) = Vz* cos(2n*t/T); Scenario (11) V:(t) = Vx * sin(211*t/T) and Vo(t) = (-1) *V2 sin[ (2n*t/T) - 4); Scenario (in) Va(t) = VX * sin(21*t/T) and Volt) = V2 [1 + sin(2n*t/T) 1/2; Note: assume OpAmp behaviour to be ideal (i.e. there is no limitation due to the OpAmp frequency response or OpAmp saturation), RI **: V Circuiti Circuit R2 R6 RI اما ما Circuit Figure 3: Conditioning circuits VX 17 Vz 1.5 V O о а 13°C