Anadigm AnadigmApex, User Manual, Page: 10 / 16

AN231K04-DVLP3 – AnadigmApex Development Board
UM023100-K001h Page 10 of 16
Figure 4: Positions of Jumpers and Default Settings
8.0 Rauch Filters
The AN231K04 printed circuit board has an available option for you to use to add Rauch filters, at either the analog
input signal path, output signal path or neither. Figure 5 details two suggested Rauch filter circuits.
These can be easily implemented by adding appropriate components to the
p.c.b.. This picture of the p.c.b show’s an example of one of two p.c.b. layouts,
for resistor and capacitor placement.
The default signal connection is directly to the header pin connected to the
AN231E04 dpASP. To use these filters add the correct components and
connect the signal input or output appropriately.
The math associated with a typical low pass input filter is also provided here.