output_1st

Figure 1: Comparison of input and output waveforms for the first difference filter.

Figure 2: The top panel is the sum of the filter outputs for input waveform number one and input waveform number two. The bottom panel is the output waveform from the first difference filter for the scaled sum of the two input waveforms. Note that the waveforms are identical thus illustrating the linearity of the first difference filter.