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PriOut3_Practice

# PriOut3_Practice - ECE 362 Outcome 3 Assessment-1Practice...

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ECE 362 Outcome 3 Assessment - 1 - Practice Exam / Solution ______________________________________________________________________________ © 2009 by D. G. Meyer / Purdue University – may not be copied or reproduced, in any form or by any means. PART 1: Multiple Choice – Select the single most appropriate response for each question. Note that none of the above MAY be a VALID ANSWER. Place answers for this part on the supplied BUBBLE SHEET only – nothing written here will be graded. Please REATTACH your completed bubble sheet to this document and TURN BOTH IN TOGETHER – failure to do so will result in a score of ZERO. Do not spend more than 60 minutes on this portion of the exam. (1) The resolution of an N-bit ATD is: (A) N 2 / (V RH - V RL ) (B) (V RH - V RL ) / N 2 (C) 2 N / (V RH - V RL ) (D) (V RH - V RL ) / 2 N (E) none of the above (2) The purpose of an anti-alias filter is: (A) to prevent input signals greater than F s /2 from folding back into the baseband (B) to remove replicas of the baseband spectrum that appear in the output spectrum centered at integer multiples of F s (C) to improve the ATD’s SQNR (D) to improve the ATD’s resolution (E) none of the above (3) For an ATD operated at a sampling frequency of 20 KHz, a combination of pure tones (sine waves) at frequencies of 8 KHz, 10 KHz, and 11 KHz would produce the following spectral components in the digitized output: (4) The final sample time of the ATD is: (5) Given that the ATD is supplied with references voltages of V RH = 4.0 volts and V RL = 0.0 volts, the output code produced in response to an input voltage of 3.5 VDC is:

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PriOut3_Practice - ECE 362 Outcome 3 Assessment-1Practice...

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