? Assume that a 3-bit ADC channel accepts analog input ranging from -2.5 to 2.5

Question

? Assume that a 3-bit ADC channel accepts analog input ranging from -2.5 to 2.5 volts, determine the following: a. Number of quantization levels; b. Step size of the quantizer or resolution; c. Quantization level when the analog voltage is 0.75 Volts; d. Binary code produced by the ADC; e. Quantization error. ? Work out the following problem: If the analog signal to be quantized is a sinusoidal waveform, that is, x(t) = 6 sin (6283t), and if the bipolar quantizer uses 8 bits, determine 1. Number of quantization levels; 2. Step size of the quantizer ; 3. The SNR.

Explanation / Answer

2^3 = 8 quantization level from -2.5 to 2.5 volts total volts are 5v 5/8 = 0.625 step size c) voltage level total = 2.5+0.75 = 3.25V/step size = code of 5 d) 101 1)no. of quantization levels = 2^8 = 256 2) total volt = 6 so step size = 6/256 = 0.023 3) Signal/Noise ratio = 20 log (2^8) = .....

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