![]() Upon reconstruction of analog signal Increases as resolution decreases Resolution - Q EFSR - full scale voltage range N = Number of discrete voltage intervals N = 2k where k is the number of bitsħ Quantization Error Quantized signal only has values at midpoint of voltage bandĭual Slope A/D Converter Successive Approximation A/D Converter Flash A/D Converter Delta – Sigma A/D ConverterĪlso referred to as an Integrating ADC Integratorġ0 Dual Slope Analog to Digital ConverterĬonverts in two phases (ramp up / ramp down ) Input voltage measurement not dependant on integrator componentsġ1 Dual Slope Analog to Digital Converter Nyquist Frequency (half sampling frequency) Aliasing occurs when signal above Nyquist frequencyĦ Quantization Error Analog (infinite values) – Digital (finite values) Two step process Sampling – Measuring analog signal at uniform time intervals Quantization – Assigning discrete measurements a binary code (each sample will have a binary number associated with it) Example of digital signal from 3 bit ADC T T T T4ĥ Aliasing Every analog signal has a frequency ![]() ![]() Going from analog to digital Types and properties of ADCĬonverts an analog signal to discrete time digital Computers need digital. 2 Introduction What is an analog to digital converter (ADC)
0 Comments
Leave a Reply. |