Signal QuantizerSnapshot of the front panel of the simulator:
Description of the simulated systemIn this simulator the sampling of an analog, continuous-time signal by an AD converter (analog-digital) is simulated. When an analog, continuous-time signal y(t) of signal range [Y_{min}, Y_{max}] is sampled by an AD (analog-digital) converter of n bits: b_{n-1}, b_{n},..., b_{1}, b_{0}, the resolution, i.e. the maximum signal range represented by the LSB (least significant bit), is q = (Y_{max} - Y_{min})/(2^{n} - 1) Example: Given a signal y between Y_{max} = 100% and Y_{min} = 0% which is sampled using a 8 bit AD converter. The resolution is q = (Y_{max} - Y_{min})/(2^{n} - 1) AimThe aim of the tasks below is to give an understanding of how the sampled (discrete-time signal) depends on the number of bits in the AD converter. MotivationSampling av continuous-time signals takes place in all applications where a computer is used to read measurement data. It is important to be able to calculate the resolution of the digital signal generated by the AD converter to decide if the accuracy is acceptable. Tasks
Updated 21. January 2008. Developed by Finn Haugen. E-mail: finn@techteach.no. |