User Guide

Control system parts
153
Control system parts
Control system parts have single-pin inputs and outputs.
The reference for input and output voltages is analog
ground (0). An enhancement to PSpice means these
components can be connected together with no need for
dummy load or input resistors.
Table 7
lists the control system parts, grouped by
function. Also listed are characteristic properties that may
be set. In the sections that follow, each part and its
properties are described in more detail.
Table 7 Control system parts
Category Part Description Properties
Basic
components
CONST constant VALUE
SUM adder
MULT multiplier
GAIN gain block GAIN
DIFF subtracter
Limiters LIMIT hard limiter LO, HI
GLIMIT limiter with gain LO, HI, GAIN
SOFTLIM soft (tanh) limiter LO, HI, GAIN
Chebyshev
filters
LOPASS lowpass filter FP, FS, RIPPLE,
STOP
HIPASS highpass filter FP, FS, RIPPLE,
STOP
BANDPASS bandpass filter F0, F1, F2, F3,
RIPPLE, STOP
BANDREJ band reject
(notch) filter
F0, F1, F2, F3,
RIPPLE, STOP
Integrator and
differentiator
INTEG integrator GAIN, IC
DIFFER differentiator GAIN
Table look-ups TABLE lookup table ROW1...ROW5
FTABLE frequency lookup
table
ROW1...ROW5
Pspug.book Page 153 Wednesday, November 11, 1998 1:14 PM