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code:goftergui [2015/11/19 14:59] (current) – created michfiel
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 +
 +=== Pulses ===
 +
 +[[http://en.wikipedia.org/wiki/Pulse_wave]]
 +
 +A pulse wave form can simple be constructed by adding two saw waves; the phase difference will control the pulse width.
 +
 +<code>
 +        double pw = pulseWidth / 2. + 1.;
 +        double y1 = ((int)(f * i) % n) / n1;
 +        double y2 = ((int)(f * i + pw) % n) / n1;
 +        double y = (y1 - y2) * (1 + pulseWidth / n1);
 +</code>
 +
 +=== Comb Filters ===
 +
 +[[http://en.wikipedia.org/wiki/Comb_filter]]
 +
 +The frequency response of a discrete-time system expressed in the Z domain is obtained by making the substitution z=exp(j*omega)
 +
 +<code>
 +        double omega = 2 * pi * f/n;
 +        double y = sqrt((1. + pow(alpha, 2.)) + 2 * alpha * cos(omega * K)) / 2;
 +</code>
  
code/goftergui.txt · Last modified: 2015/11/19 14:59 by michfiel