slides-06 - DATA ACQUISITION SYSTEMS FALL 2004 MKM 503E...

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FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 1 DATA ACQUISITION SYSTEMS
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FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 2 0 bit 1 bit 2 bit 3 bit 2 2 2 2 0 1 2 3 1110 2 0 2 1 2 1 2 1 0 1 2 3 = × + × + × + × Example: Conversion for a decimal number 14 BINARY SYSTEM MSB (the most significant bit) LSB (the least significant bit)
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FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 3 ANALOG TO DIGITAL CONVERSION PROCESS
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FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 4 ANALOG TO DIGITAL CONVERSION SIGNALS Quantisation Levels for (3-bit system) Input voltage is limited by a max. value
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FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 5 SAMPLING THEOREM Different sampling rates for the analogue signal can be used. Nyquist Criterion (Shannon’s Sampling Theorem) : To get the right form of the original (analogue) signal, sampling rate must be at least twice that of the highest frequency of the original signal. Aliasing: When the sampling rate is less than twice the highest frequency, the reconstruction represent some other analogue signal and we obtain a false image of the real signal.
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FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 6 DIGITAL-TO-ANALOG CONVERSION
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This note was uploaded on 09/21/2011 for the course EE ee taught by Professor Ee during the Spring '10 term at Istanbul Technical University.

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slides-06 - DATA ACQUISITION SYSTEMS FALL 2004 MKM 503E...

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