how to create a vco with sine wave variation?

Question

CAROL GARRITTY 2017-9-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/357269-how-to-create-a-vco-with-sine-wave-variation

编辑： CAROL GARRITTY 2017-9-19

I was able to create a moving phase animation of a vco using spectrogram. Sort of like a strip chart? But I would like to create a sine wave variation instead of a sawtooth. Code snippet below. Figure 1 is a static display of a sawtooth variation. Figure 2 is a moving phase display based on Figure 1. Figure 3 is my workspace for a sine wave variation.

figure(1)
fs = 10e3;
t = 0:1/fs:2;
x = vco(sawtooth(7*pi*t,0.5),[0.1 0.4]*fs,fs);
spectrogram(x,kaiser(256,5),220,512,fs,'yaxis')
figure(2)
fs = 10e3;
for phase = 0:1:10;
  t = 0:1/fs:2;
  y = vco(sawtooth(7*pi*t+phase,0.5),[0.1 0.4]*fs,fs);
  spectrogram(y,kaiser(256,5),220,512,fs,'yaxis');
  disp(phase);
  pause(0.1);
end
figure(3)
fs = 10e3;
for phase = 0:1:10;
    for freq = 1:1:10
        t = 0:1/fs:2;
        z = sin(freq*1000*t+phase);
        spectrogram(z,kaiser(256,5),220,512,fs,'yaxis');
        disp(phase);
        pause(0.1);
    end
end

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Answer 1

CAROL GARRITTY 2017-9-19

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/357269-how-to-create-a-vco-with-sine-wave-variation#answer_282142

编辑：CAROL GARRITTY 2017-9-19

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I think I figured it out. I thought I tried this before, but I must have misspelled something.

figure(3)
fs = 10e3;
for phase = 0:1:10;
    t = 0:1/fs:2;
    z = vco(sin(5*pi*t+phase),[0.1 0.4]*fs,fs);
    spectrogram(z,kaiser(256,5),220,512,fs,'yaxis');
    disp(phase);
    pause(0.1);
end