Question

3. With the aid of a diagram, briefly explain th ing principle of a Successive a) Approximation Analog-to-Digital Converter (ADC) b) An ADC has to be designed to convert voltages in the range from -5 V to +5 V, with a resolution below (better than) 1 mV. What is the minimum number of bits required to meet this design specification? An ADC has to be designed to convert input voltage signals with frequency c) components less than or equal o 250 Hz. Which of the following sampling frequencies can be used to correctly sample the input signals, without aliasing errors? Why? i) 100 Hz; ii) 125 Hz; iii) 250 Hz; iv) 500 Hz; v) 2.5 kHz. d) The input signal in question c) above is affected by noise at frequencies above 10 kHz. An analog filter has to be designed to decrease such noise before the signal is sampled by the ADC. Which of the following types of filters can be used for this purpose? i) Low-pass filter; ii) High-pass filter; iii) Band-pass filter iv) Band-stop filter. e) The Hamming code is used to transmit a digital word of 20 bits. Determine the number of parity check bits (included in the 20 bits required to detect and correct single bit errors

Answer 1

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