Biomedical Engineering Reference
In-Depth Information
Figure 6.4
Just as in a graphic equalizer, the basic shape of the waveform generated by this arbi-
trary signal generator tracks the shape described by a bank of linear slider potentiometers.
40ms
R
T
P
Midpoint
S
Baseline
Baseline
Q
Figure 6.5
The P-QRS-T complex can be reconstructed from 14 analog samples. One more sam-
ple is needed to represent the isoelectric baseline level between the end of the T-wave and the start
of the P-wave. Each step would last 40 ms, which requires a sampling clock frequency of 25 Hz. The
trigger clock frequency needs to be 1 Hz to simulate a rate of 60 beats/min.
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