National Instruments SCB-68 - Manual (Page 55)

Chapter 5 Adding Components for Special Functions
SCB-68 Shielded Connector Block User Manual 5-10 ni.com
Figure 5-10. Response of a Real Filter to a Square Wave Input Signal
One-Pole Lowpass RC Filter
Figure 5-11 shows the transfer function of a simple series circuit consisting
of a resistor (R) and capacitor (C) when the voltage across R is assumed to
be the output voltage (V
m
).
Figure 5-11. Transfer Function of a Simple Series Circuit
The transfer function is a mathematical representation of a one-pole
lowpass filter, with a time constant of
as follows:
(5-3)
Time (t)
Volts (V)
C
R V
in
V
m
1
2 πRC
---------------
T s
( )
G
1 2
πRC ( )s
+
------------------------------- =