mirror of https://github.com/EspoTek/Labrador.git
67 lines
1.8 KiB
Matlab
67 lines
1.8 KiB
Matlab
vref = 3.3/2;
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R4 = 75e3;
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R3 = 1e6;
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scope_gain = 4;
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TOP = 2048;
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global saved_waveform_ch1;
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global fastmode
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tt = 2.5;
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bt = 0.8;
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vcc = 3.3;
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tic
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top_val = (tt/vref * R4/(R3+R4) * scope_gain * TOP)
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bot_val = (bt/vref * R4/(R3+R4) * scope_gain * TOP)
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samples_per_sec = 375000 / (3 * fastmode + 1)
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range = length(saved_waveform_ch1) - samples_per_sec / 5
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gtt = saved_waveform_ch1(range:end)>top_val;
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gtb = saved_waveform_ch1(range:end)<bot_val;
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num_samples = 50;
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first_bip = find(gtb,num_samples);
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first_bip = first_bip(end)
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second_bip = find(~gtb(first_bip:end), num_samples);
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second_bip = second_bip(end) + first_bip
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third_bip = find(gtt(second_bip:end), num_samples);
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third_bip = third_bip(end) + second_bip
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dt = (third_bip - second_bip) / samples_per_sec
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R_test = 100000
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C_measured = -dt / (R_test * log((vcc-tt)/(vcc-bt)))
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toc
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% num_samples = 20
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% first_bip = find(gtt,num_samples);
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% if ~isempty(first_bip)
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% first_bip = first_bip(end);
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%
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% second_bip = find(~gtt(first_bip:end), num_samples);
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% if ~isempty(second_bip)
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% second_bip = second_bip(end) + first_bip;
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%
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% third_bip = find(gtb(second_bip:end), num_samples);
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% if ~isempty(third_bip)
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% third_bip = third_bip(end) + second_bip;
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%
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% samples_per_sec = 375000 / (3 * fastmode + 1);
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% dt = (third_bip - second_bip) / samples_per_sec;
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%
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% C_measured = -dt / (Rtest * log(1/2.5))
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% global text_box_c
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% set(text_box_c, 'String', sprintf('C = %.3enF', C_measured * 1e9));
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% end
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% end
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% end
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