User Guide

Chapter 6 Analog behavioral modeling
158
band cutoff of 1.2 kHz. The pass band ripple is 0.1 dB and
the minimum stop band attenuation is 50 dB. Assuming
that the input to the filter is the voltage at net 10 and
output is a voltage between nets 5 and 0, this will produce
a PSpice netlist declaration like this:
ELOWPASS 5 0 CHEBYSHEV {V(10)} = LP 800 1.2K .1dB 50dB
HIPASS
The HIPASS part is characterized by two cutoff
frequencies that delineate the boundaries of the filter pass
band and stop band. 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 HIPASS part provides one
input and one output.
Figure 36 shows an example of a HIPASS filter device.
This is a high pass filter with the pass band above 1.2 kHz
and the stop band below 800 Hz. Again, 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:
EHIGHPASS 5 0 CHEBYSHEV {V(10)} = HP 1.2K 800 .1dB 50dB
BANDPASS
The BANDPASS 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
FS stop band frequency
FP pass band frequency
RIPPLE pass band ripple in dB
STOP stop band attenuation in dB
RIPPLE pass band ripple in dB
STOP stop band attenuation in dB
F0, F1,
F2, F3
cutoff frequencies
Figure 36 HIPASS filter part example.
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