3. Principles of data conversion

Figure 1 - Block diagram of an analog-digital data acquisition system

Figure 2 - Block diagram of a digital-analog data generation system

Figure 3 - Data acquisition with telephone time switching

Figure 4 - Example of time representation of a continuous sinusoidal signal

Figure 5 - Example of AN and NA transfer function

Figure 6 - Example of AN and NA quantization error

Figure 7 - Quantization error and noise voltage

Figure 8 - Example of a discrete spectrum obtained by FFT

Figure 9 - Representation of sampling time and opening time

Figure 10 - Opening time graph for an error of 0.1 LSB

Figure 11 - Demonstration of the impossibility of recognizing a signal sampled at 2 fs.

Figure 12 - Spectral representation of the wanted signal and sampling frequency

Figure 13 - Representation of aliasing

Figure 14 - Spectral representation of oversampling

Figure 15 - Spectral representation of subsampling

Figure 16 - Example of sinusoid generation

Figure 17 - Spectrum image and folds ± faudio &#43; k fech and theoretical response of cardinal sine blocking. Spectrum obtained with blocking

Figure 18 - Spectrum image and folds ± faudio &#43; k fech and theoretical response of cardinal sine blocking. Spectrum obtained with blocking