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BOS1901-KIT
User Guide
9.2.6
Piezo Actuator Low-Pass Filter
Two 0603 resistors ROx are in series with each BOS1901 output channels OUTx. They can be used to
create a low-pass filter with the actuator and filter out audible noise. Resistor values to use are
determined by the desired cut-off frequency and the actuator capacitance. A bode plot is useful to
assess the amplitude attenuation at the waveform frequency in order to compensate it in the
programmed voltage waveform. Initially, the populated values are 0 ohm.
Figure 24: Low-pass filter resistors location
BT001DDK04.01 – Issue 1
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