Detailed analysis of the circuit in Fig. 18.34 shows that optimum performance (as a sine

Chapter 18, Problem 18.53

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Detailed analysis of the circuit in Fig. 18.34 shows that optimum performance (as a sine shaper) occurs when the values of I and R are selected so that RI = 2.5VT , where VT is the thermal voltage, and the peak amplitude of the input triangular wave is 6.6VT . If the output is taken across R (i.e., between the two emitters), find vI corresponding to vO = 0.25VT , 0.5VT , VT , 1.5VT , 2VT , 2.4VT , and 2.42VT . Plot vOvI and compare to the ideal curve given by vO = 2.42VT sin vI 6.6VT 90 D

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