The input resistor,R,of an amplifier circuit is to be replaced with a switched-capacitor circuit. Assume that the switched capacitor value is 1000 pF. You want the switchedcapacitor to emulate a 10 kΩ resistor.Determine the frequency at which the capacitor must be switched.
Question 12.22: The input resistor,R,of an amplifier circuit is to be replac...
Using the formula R=T/C
T=RC (10 kΩ)(1000 pF) = 10 \mu s
This means that the switch must be operated at a frequency of
f=\frac{1}{T}=\frac{1}{10 \ \mu s } = 100kHz
The duly cycle is 50% so that the switch is in each position half of the period.
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