*17.54 In the precision rectifier of Fig. 17.38, the resistor R is replaced by a capacitor C. What happens? For equivalent performance with a sine-wave input of 60-Hz frequency with R= 1 k2, what value of C should be used? What is the AL VA response of the modified circuit at 120 Hz? At 180 Hz? If the amplitude of va is kept fixed, what new function does this circuit perform? Now consider the effect of a waveform change on both circuits (the one with Rand the one with C). For a triangular-wave input of 60-Hz frequency that pro- duces an average meter current of 1 mA in the circuit with R, what does the average meter current become when R is replaced with the Cwhose value was just calculated? D4 D2 Figure 17.38