A second-order RC lowpass filter is using OPAMP and two pairs of R and – McqOptions

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1.	A second-order RC lowpass filter is using OPAMP and two pairs of R and C. If the cutoff frequency is 2.2 kHz, and the value of capacitance is 22 nF, find the value of R.
A.	4.7 k
B.	3.3 k
C.	2.2 k
D.	1.0 k
Answer» C. 2.2 k

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