Introduction to electrical and computer engineering ENG1450 All Labs

ENG 1450 Introduction to Electrical and computer Engineering

Lab 9

Digital Logic Gates


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Student Number: _______________________________



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Instructor: _______________________________



Date: _______________________________




Wiring Quality (F / W / O) _________ _________________________
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Did students clean-up after the lab? _________________________
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ENG
1450
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Lab
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2017-­‐‑v1
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, Part A: Digital Signal Concepts

Answer the following questions, to test your understanding of sampling frequency and bit depth.

1. You are part of new automobile design team, and are responsible for designing the sensor data
collection system. The specification of the data collection system is that is must be capable of
receiving data with a resolution down to 0.1% of full scale (1 part in 1000) for any given sensor.
For example, suppose the driver pushes the gas pedal, the motion of which is read by an
electronic sensor such that the range of motion is defined from 0 (not pressed) to 1 (fully
pressed). If you want 0.1 % accuracy, you need 1000 possible data values between 0 and 1.
How many bits do you need to represent data to 0.1% accuracy?




2. Your automobile has to collect data for its anti-lock braking system, such that data is collected
fast enough from each anti-skid sensor (one on each wheel) to obtain a reading once per 1 cm
of travel at a speed of 100 km/h from every wheel. What sampling frequency does your sensor
data collection system need to have in order to collect data from all wheels? If the data
transmitted is an 8 bit number, what data rate would your system need to have?




Sampling frequency = ___________________ Hz


Data rate = ___________________ bits / second




ENG
1450
-­‐‑
Lab
9
April
1,
2017-­‐‑v1
Page
2