Problem 4 O O An 8bit 20 us 20e6 s bipolar ADC with referenc

Problem #4 O O An 8-bit, 20 us (20e-6 [s]) bipolar ADC with reference voltage Vr 5 [V] will monitor a sinusoidal signal with peak voltage of 3 V]. (a) What is the maximum frequency that can be tracked to 8-bit accuracy? (b) Plot the maximum (trackable) frequency VS number of bits accuracy used in ADC. Assume that the range of number of bits is (8,9, 2) Also assume that the tc values of the ADC are proportional to the number bits of the ADC. Use \'\'semilogy\" function when plotting for readability

Solution

figure(2) subplot(3,1,1); plot(f1,MY);xlabel(\'\');ylabel(\'AMPLITUDE\'); axis([4500 5500 -.5 1]);%zoom in/out title(\'Frequency domain plots\'); grid on subplot(3,1,2); plot(f1,20*log10(abs(MY).^2));xlabel(\'FREQUENCY(Hz)\');ylabel(\'DB\'); axis([4000 6000 -80 10]);%zoom in/out grid on title(\'Modulated QPSK carrier\') figure(3) subplot(3,2,1); plot(td,bitfinal1) title(\'Received output data\'); grid on; axis([0 1 -2 2]); subplot(3,2,3); plot(tiq,ycfo1); title(\'Filtered I Channel Data\'); grid on; subplot(3,2,5); plot(tiq,ycfo); title(\'Filtered Q Channel Data\'); grid on; subplot(3,2,2); plot(tiq,sig_rx1); grid on; axis([0 1 -1 1]);%zoom in/out title(\'Unfiltered I Channel Output\'); subplot(3,2,4); plot(tiq,sig_rx); grid on; axis([0 1 -1 1]);%zoom in/out title(\'Unfiltered Q Channel Output\'); phasevl=atan2(ycfo1,ycfo);%phases of transmitter output %phase deviation---(-2.355 radians)=-135 degrees(-1-1) %phase deviation---(+0.785 radians)=+45 degrees(1 1) %1) %phase deviation---(-0.785 radians)=-45 degrees(-1 1) %phase deviation---(+2.355 radians)=+135 degrees(1-1) subplot(3,2,6); plot(tiq,phasevl); grid on; title(\'Output phase deviation(radians) levels\') xlabel(\' Time\') ylabel(\'Radians\') figure(4); subplot(4,2,1); plot(tiq,noise1);%plot noise times a constant grid on; title(\'Noise output\') xlabel(\' Time\') ylabel(\'Voltage\') subplot(4,2,3) plot(tiq,po1i); axis([0 1 -1 6]); grid on; title(\'I channel ADC output\') xlabel(\' Time\') ylabel(\'Voltage\') subplot(4,2,5) plot(tiq,po1q); axis([0 1 -1 6]); grid on; title(\'Q channel ADC output\') xlabel(\' Time\') ylabel(\'Voltage\')