a) Describe how the square wave can be created by adding a fundamental frequency. Show this re- lationship graphically.

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9. Convert the following Decimal numbers to Binary and then from binary to Gray code: DECIMAL BINARY GRAY CODE 17 33 40 63

8. Let us consider the following circuit: Vin R Vin (a) Find an expression for Vout in terms of Vin, d, R, C, and R. (b) For this part, assume R = R and R*C = 1s. Also take Vin to be a triangle wave of amplitude 1V and period 1s. Draw a plot of Vin and Vout- (The triangle wave should start from zero and rise linearly to its maximum of 1V, which it reaches at t = 0.5s; it should then decrease linearly back to OV, which it reaches at t = 1s.) (c) Consider changing the circuit to: R R Vi-W Cg RE www How would this change your results to (a) and (b)? (Hint: what are in and i, for the op-amp? This isn't hard!) (d) Consider the following circuit: + Find Vout as a function of V₁, R, RF, C, and RE RE ww Rg Ce Vout RE www Vout -Vout