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: (A) 8 KHz, 10 KHz, and 11 KHz (B) 8 KHz, 10 KHz, and 22 KHz (C) 8 KHz, 9 KHz, and 10 KHz (D) 4 KHz, 5 KHz, and 5.5 KHz (E) none of the above (4) The final sample time of the ATD is: (A) the amount of time the input is “integrated” (sampled) (B) the total amount of time to perform the conversion (C) the amount of time needed to perform the successive approximation algorithm (D) the total amount of time needed to perform the programmed sequence of conversions (E) none of the above (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: (A) $B0 (B) $C0 (C) $D0 (D) $E0 (E) none of the above (6) The fast flag clear mode is most useful in applications that operate the ATD in a: (A) non-scanning, program-driven mode (B) continuous-scanning, interrupt-driven mode (C) non-scanning, interrupt-driven mode (D) continuous-scanning, program-driven mode (E) none of the above
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ECE 362 Outcome 3 Assessment - 2 - Practice Exam / Solution ______________________________________________________________________________ © 2009 by D. G. Meyer / Purdue University – may not be copied or reproduced, in any form or by any means.
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PriOut3_Practice - ECE 362 Outcome 3 Assessment -1Practice...

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