User Guide

Control system parts
159
band, respectively. The BANDPASS part provides one
input and one output.
Figure 37 shows an example of a BANDPASS filter device.
This is a band pass filter with the pass band between 1.2
kHz and 2 kHz, and stop bands below 800 Hz and above
3 kHz. The pass band ripple is 0.1 dB and the minimum
stop band attenuation is 50 dB. This will produce a PSpice
netlist declaration like this:
EBANDPASS 5 0 CHEBYSHEV
+ {V(10)} = BP 800 1.2K 2K 3K .1dB 50dB
BANDREJ
The BANDREJ part is characterized by four cutoff
frequencies. The attenuation values, RIPPLE and STOP,
define the maximum allowable attenuation in the pass
band, and the minimum required attenuation in the stop
band, respectively. The BANDREJ part provides one
input and one output.
Figure 38 shows an example of a BANDREJ filter device.
This is a band reject (or “notch”) filter with the stop band
between 1.2 kHz and 2 kHz, and pass bands below 800 Hz
and above 3 kHz. The pass band ripple is 0.1 dB and the
minimum stop band attenuation is 50 dB. This will
produce a PSpice netlist declaration like this:
ENOTCH 5 0 CHEBYSHEV {V(10)} = BR 1.2K 800 3K 2K .1dB 50dB
RIPPLE is the pass band ripple in dB
STOP is the stop band attenuation in dB
F0, F1,
F2, F3
are the cutoff frequencies
Figure 37 BANDPASS filter part example.
Figure 38 BANDREJ filter part example.
Pspug.book Page 159 Wednesday, November 11, 1998 1:14 PM