Keywords:
Frequency Response
Active Filter
Problem #3
a) Obtain the transfer function H(jω) corresponding to the Bode magnitude diagram shown in Fig. 1.
b) What is the cutoff frequency of the filter?
c) Design the filter with the circuit give in Fig. 2. Find the values of C and Ri.
Need a hint?
Fig. 1 shows the Bode magnitude of a first order lowpass filter and the transfer function should be a gain multiplied by a simple pole. Once the transfer function is determined, the cutoff frequency of the first order filter is the corner frequency of the pole in the transfer function.