OP AMP를 이용한 BPF 설계를 PSPICE로 표현

소개글

PSPICE를 이용하여 BPF 증명

목차

Butterworth type
Chebyshev type
Our team design goal is
● 1st LPF order ()
● 1st HPF order ()
● 2nd LPF order ()
● 2nd HPF order ()
● 6th bandpass fiter order ()
● After control the R and C values, 6th bandpass fiter order
● Final 6th bandpass fiter order ()
● Use unity-gain narrow bandpass filter
● Conclusion

본문내용

Butterworth type
This filter has the flattest possible pass-band magnitude response. Attenuation is -3dB at the design cutoff frequency. Attenuation beyond the cutoff frequency is a moderately steep -20dB/decade/pole.The pulse response of the Butterworth filter has moderate overshoot and ringing.

Advantages:
Maximally flat magnitude response in the pass-band.
Good all-around performance.
Pulse response better than Chebyshev.

Diavantages:
Some overshoot and ringing in step response.

Chebyshev type
This filter response has the steeper initial rate of attenuation beyond the cutoff frequency than Butterworth.This advantage comes at the penalty of amplitude variation(ripple) in the pass-band. Unlike Butterworth and Bessel response, which have 3dB attenuation at the cutoff frequency,Cebyshev cutoff frequency is defined as the frequency at which the response falls below the ripple band. For even-order filters, all riple is above the dc-normalized passband gain response, so cutoff is at 0dB. For odd-order filters, all riple is below the dc-normalized passband gain response, so cutoff is at -(ripple) dB. For a given number of poles, a steeper cutoff can be achieved by allowing more pass-band ripple. The Chebyshev has more ringing in its pulse response than the Butterworth - especially for high-ripple designs.

참고 자료

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