Scaling of a notch filter

1. What is scaling in filters?
2. What is the importance of scaling in filter design?
3. What is impedance scaling in filters?
4. What is the gain of notch filter?

What is scaling in filters?

Scaling is a process of readjusting certain internal gain parameters in order to constrain internal signals to a range appropriate to the hardware with the constraint that the transfer function from input to output should not be changed. The filter in Fig. 11.1(a) with unscaled node x has the transfer function.

What is the importance of scaling in filter design?

All the values of components in the analog filter circuit is not available. Therefore, scaling is generally used so that we can have a new value for the various components in the filter network.

What is impedance scaling in filters?

Impedance scaling. Multiply all resistors by k and divide all capacitors by k, where k is any suitable constant that will bring the impedances to the desired levels. Note that k can be greater or less than unity, so that R's can be increased and C's decreased or vice versa as desired.

What is the gain of notch filter?

The notch formed by R in parallel with the series LC can be shaped to compensate for the peaking produced by the amplifier and the parasitic capacitance. The result is 1-GHz bandwidth (−3 dB), 250-MHz gain flatness (0.1 dB) and less than 1-dB peaking for a gain equal to 1.