FUNS
The FUN Equations
16-5
a
*
10^b
The actual equation is: a x ( 10
(2 x b)
÷100). This is an exponential curve. 10 is raised to the (2 x
b) power, then divided by 100. This result is then multiplied by a. Another way to express this
is as follows: a change of 1 in the value of input b results in a hundredfold change in the output
value. Here are a few possible output values:
Input values Output values
a = +1, b= +1 +1
a = +1, b= 0 .01
a = +1, b= -1 .0001
a = 0, b = +1 0
a = 0, b = 0 0
a = 0, b = -+1 0
a = -1, b = +1 -1
a = -1, b = 0 -.01
a = -1, b = -1 -.0001
| a + b |
The values of inputs a and b are added, and the absolute value of the sum is taken. If the sum is
negative, it is multiplied by -1. This makes the FUN a unipolar control source. (See the
illustration on the following page.)
+1
+1
-1
-1
output
values
input
values
a = 1
+1
+1
-1
-1
output
values
input
values
a = -1
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