Switched Capacitor Filter using Arduino Nano, AD9833 en MAX261
This is PUSCAF II (Programmable Universal Switched Capacitor Filter).
The filter used is a MAX261 and is clocked using an Analog Devices AD9833 Programmable Waveform Generator.
The Control Voltages are measured with an Arduino Nano, which also sets the registers for the AD9833 and MAX261.
The MAX261 is a dual 12dB/oct universal filter, the first part is programmed to act as a lowpass filter, the second (the output stage) is used as a lowpass filter and bandpass filter.