Slide #1

• Date & Time: Wednesday, 4.00 – 5.15 pm

• One page double sided formula sheet allowed

• 4-5 problems; 10 T/F, Fill the gaps; 3-5 short questions

• Presentation from next Monday: Mohammad, Fatima, Kevin

Slide #2

1. The higher the bandwidth the lower is the …..2. The higher the noise the lower is the ……..3. Most sensors are linear4. A capacitive sensor work well in smoky environment. 5. An LVDT sensor works better than a capacitive sensor in a humid environment6. Hall effect sensor works better than capacitive sensor when the temperature is

not constant7. A capacitive displacement sensor is very linear8. Linear optical sensors can only be one directional9. A free standing AlGaN crystal will have both spontaneous and piezoelectric

polarization10.A piezoelectric device can be used for steady state pressure sensing11.A piezoresistive device can be used to measure a sinusoidal pressure variation12.A white noise has a spectral density that deceases monotonically with

frequency

Slide #3

1. Give 3 examples for displacement sensing based on different principles2. Which displacement sensor type would you use to detect small displacement of

(i) an iron rod (ii) oxide thickness on a semiconductor wafer ?3. Mention one advantage and one disadvantage of a capacitive sensor.4. Mention a very widely used displacement and rotational speed sensor. Draw the

configuration of this sensor for sensing rotational speed. 5. Describe briefly the operation of linear optical sensor6. Mention one advantage and one disadvantage of an ultrasonic sensor7. All accelerometers use an inertial mass for detection8. Accelerometers based on inertial mass measure the acceleration of the inertial

mass to give out the signal