{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

351 Midterm Exam solutions

351 Midterm Exam solutions - Midterm Exam SOLUTIONS ENME...

This preview shows pages 1–2. Sign up to view the full content.

1 Midterm Exam SOLUTIONS ENME 351, Spring 2010 1. Short Answers (a) The full-scale output range (FSR) of a particular sensor systemis 0-10 V . The system includes analog-to-digital conversion with a 12-bit quantizer. How many states can the quantizer produce? # states = 2 12 = 4096 (b) What is the resolution of the sensor system in (a) due to quantization? Resolution due to quantization: Q = (full-scale range)/(#states) = 10 V / 4096 = 2.44 mV Resolution limit due to noise: 1 mV (given) Quantization dominates, and the resolution is 2.44 mV (c) What is the dynamic range of the sensor system in (a) due to quantization (express in dB)? DR = 20 log(Q) = 20 log(4096) = 72.2 dB (d) Now consider a particular measurement system that is entirely analog, i.e. no A/D converter. In this system, due to random noise, an output voltage noise signal up to 1 mV is observed when no input is applied. A given measurement with the sensor in (a) yields an output of 2 V . What is the signal-to-noise ratio (SNR) for the sensor, expressed as signal (not power) in dB? SNR = 20 log(signal/noise) = 20 log(2/.001) = 20 log(2000) = 66.0 (e) In one sentence, state the reason for using inductors (instead of resistors) between adjacent stages of a Butterworth filter. To avoid significant changes to the phase of the signal. (f) Consider the following 4th order system. What is the steady-state value of y(t)?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern