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Unformatted text preview: condition. (5 marks) Speed = 1200 rpm Fig. 1 2. A design engineer is designing a robotic toy which involves analog-to-digital (AD) conversion and digital-to-analog (DA) conversion. For the AD conversion, he needs to determine the following: (a) The smallest step size (resolution) of an 8-bit ADC in the range of − 5 V to +5V. (3 marks) (b) The number of bits required for an ADC which has a range of 5V and a resolution of 5 mV. (3 marks) (c) The conversion time for a 12-bit ADC with a clock frequency of 1 MHz. (3 marks) (d) The digital output code of 7.5V if an 8-bit ADC with a 0V to 10V range is used for the purpose of sampling the voltage of an analog sensor. (3 marks) For the DA conversion, he needs to determine the following: (e) The resolution of a 4-bit R − 2R DAC as shown in Fig. 2 if the reference voltage is 5 V. Fig. 2 END...
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This note was uploaded on 01/16/2010 for the course ENG 91301 taught by Professor Lui during the Spring '08 term at Hong Kong Institute of Vocational Education.
- Spring '08