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4. Test Prep. An unknown RC filter, with a single R and single C is driven by a good ( “ideal”) sine-wave voltage source, of amplitude 10 Vpp (peak-to-peak). At 20 Hz, the output amplitude is 2 Vpp
. At 1000 Hz, the output is 10.0 Vpp- (a) Determine the fa frequency of this filter and its type, i.e., high-pass or low-pass. (b) Sketch a quantitatively accurate amplitude response curve: Vout/Vin in dB versus log10 f. (c) When a load of 1k22 is added to the output, the output voltage for the 20 Hz signal drops to 1.0 Vpp. From this information, determine the R and C of the filter, and its equivalent schematic.
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