A maximally fiat magnitude transfer function is characterized by aim, crab,, and n = 5. The frequency is normalized to the passband corner. Determine the lowest frequency to, at which ams is encountered.

## Repeat Problem 7.1 for Chebyshev and maximally flat magnitude functions with the

Repeat Problem 7.1 for Chebyshev and maximally flat magnitude functions with the same value fora,,,,,, but with What conclusion can be drawn about the efficiency of the two approximation functions and about its dependence on stopband attenuation and transition bandwidth? Problem 1 A Chebyshev lowpass filter is required to provide of attenuation at with maximum passband attenuation of annz = 0.4 dB in and the degree nc of the function. Repeat the problem for a filter with maximally flat magnitude. Compare the results with respect to degree and Q values.

## A Buttenvorth transfer function is characterized by n = 7. Determine s and the a

A Buttenvorth transfer function is characterized by n = 7. Determine s and the attenuation at (i) 12 (top = I). What is the phase angle at f = 0.8?

## A Chebyshev lowpass filter is required to provide of attenuation at with maxim

A Chebyshev lowpass filter is required to provide of attenuation at with maximum passband attenuation of annz = 0.4 dB in and the degree nc of the function. Repeat the problem for a filter with maximally flat magnitude. Compare the results with respect to degree and Q values.

## A maximally Hat magnitude transfer function is to be derived such that arm, = 0.

A maximally Hat magnitude transfer function is to be derived such that arm, = 0.02 dB in 0 < to="">< i="" and="" ami„="48" db="" for="" to=""> 2.2. Find the parameters n and s, and use Butterworth tables to the function. Design a test Sallen–Key filter using suitable opamps.

## A highpass filter is required to meet the specifications shown in Fig. P6.21. Ma

A highpass filter is required to meet the specifications shown in Fig. P6.21. Make use of the RC-CR transformation of Section 4.5.1. to design the filter, and scale so that all capacitors have the value of

## A maximally flat magnitude transfer function is char-acterized by the parameters

A maximally flat magnitude transfer function is char-acterized by the parameters e = 0.075 and n = 7. Determine the minimum attenuation at the stopband frequency oas = 1.85cop. Assume 4 = 980 Hz. Find the transfer function and its poles. relying on Butterworth tables. Design a test a Sallen—Key filter using suitable opamps.

## Consider the RC opamp circuit shown in Fig. P6.20. What value of RI and R2 will

Consider the RC opamp circuit shown in Fig. P6.20. What value of RI and R2 will give the transfer function

## Figure P6.4 shows an RLC circuit driven by a currcnt source I. It is given that

Figure P6.4 shows an RLC circuit driven by a currcnt source I. It is given that R2 = I. You arc to find the values of C1 and L2 such that V2//1 gives a Butterworth frequency response.

## Design an Ackerherg-Mossberg circuit with two equal capacitors. Choose the resis

Design an Ackerherg-Mossberg circuit with two equal capacitors. Choose the resistors such that the circuit has a Butterworth response with dc gain equal to K.