- added cic_plot

git-svn-id: http://moon:8086/svn/matlab/trunk@155 801c6759-fa7c-4059-a304-17956f83a07c
2021-03-23 15:06:39 +00:00
parent e033d30500
commit 6d863f0539
1 changed files with 23 additions and 0 deletions
@@ -0,0 +1,23 @@
+function cic_plot(M, N, R)
+% cic_plot(M, N, R)
+
+ns = 1000;
+f = 2*(1:ns)/ns;
+H = abs(sin(pi*M.*f)./sin(pi.*f/R)).^N;
+
+subplot(2,1,1)
+plot(f,H); 
+xlabel('f / fs');
+ylabel('G');
+grid;
+
+Gain = (R*M)^N
+BitGrowth = ceil(N*log2(R*M))
+
+subplot(2,1,2)
+plot(f,20*log10(H/Gain));
+xlabel('f / fs');
+ylabel('A/dB');
+grid;
+
+Atten_fs2 = 20*log10(H(ns/2)/Gain)