BIO-TRANSDUCERS AND APPLICATIONS Old Question Papers (Supple, Aug/Sep 2007)

SET :1

1. Explain the following characteristics: (a) Linearity (b) Accuracy (c) Range (d) Frequency response.
2. Show how a thermistor and strain gauge are used in instrumentation of bio signals giving one circuit in each case with all details.
3. (a) Write note on chemical thermometry. (b)Explain the terms: i. Radiation thermometry. ii. Clinical thermometry
4. (a) Describe in detail potentiometer transducers. (b) A transducer with a sensitivity of 5 V/V/g is used to measure a 120-gram force. Find the output voltage if an 8V D.C excitation potential is used.
5. Write short notes on: (a) Elastic transducer (b) Capacitive transducer (c) Optical transducer.
6. How do you measure blood pressure? What are the methods and explain them in brief?
7. What is the use of plethysmograph? Describe with circuit diagram. Find the potential generated if blood flowing vessel with a radius of 0.9cm cuts a magnetic field of 250 G. assume a volume low rate of 175 cm3/sec.
8. With a neat circuit diagram explain the operation of an instrumentation amplifier. Give the gain calculations.

SET :2

1. (a) Define noise? (b) Define about the sampling errors? (c) Explain active and passive Transducer?
2. What is thermistor? Give the basic science of the thermistor with circuit symbols and packing style. A thermistor has a positive temperature coefficient of +0.002 ohms /ohms /0c at 250c . What is its resistance at 98.60c if the normal resistance is 12.1k ohms?
3. What is a radiation thermometer? How is it used in medical thermometry?
4. (a) Explain the terms: i. Resistive transducer ii. LVDT. (b) Write the working principle of Inductive transducer. Describe its merits and demerits.
5. (a) Explain the differentiation and integration techniques that are used to measure distance related parameters (b) Explain the operation of piezoelectric transducers. Mention its applications.
6. With a neat diagram explain about a piezoelectric transducer. Also explain how it can be used as an arterial pressure sensor?
7. What is dilution technique? Describe the Fick, Dye and thermo dilution method.
8. (a) Explain the transmission of biological data through radio telemetry. (b) Explain in detail any two concrete application of telemetry in the field of medicine.

SET :3

1. (a) Define noise? (b) Define about the sampling errors? (c) Explain active and passive transducer?
2. (a) Explain the principle and measurement of temperature using a thermocouple. (b) What are the medical applications of thermistors. Explain in detail.
3. (a) Write note on chemical thermometry. (b) Explain the terms: i. Radiation thermometry. ii. Clinical thermometry
4. (a) Describe in detail potentiometer transducers. (b) A transducer with a sensitivity of 5 V/V/g is used to measure a 120-gram force. Find the output voltage if an 8V D.C excitation potential is used.
5. (a) Describe a transducer that can be used to measure angular velocity. (b) Describe in detail the piezo electric transducers used to measure acceleration.
6. Define mean arterial blood pressure. Explain pressure gradient technique with circuit diagram?
7. Write short notes on: (a) Transit time flow methods. (b) Implantable pressure transducers. (c) Intra vascular thermister probe. (d) Water filled plethysmography.
8. With a neat circuit diagram explain the operation of an instrumentation amplifier. Give the gain calculations.

SET :4

1. (a) Explain the characteristics of a transducer. (b) What is Amplitude distortion. How it can be minimized.
2. What is thermistor? Give the basic science of the thermistor with circuit symbols and packing style. A thermistor has a positive temperature coefficient of +0.002 ohms /ohms /0c at 250c . What is its resistance at 98.60c if the normal resistance is 12.1k ohms?
3. (a) Write note on chemical thermometry. (b) Explain the terms: i. Radiation thermometry. ii. Clinical thermometry
4. Describe the various types of displacement transducers that can be used in vitro and in vivo.
5. Write short notes on: (a) Elastic transducer (b) Capacitive transducer. (c) Optical transducer.
6. (a) Explain occlusive cuff method of measurement of BP. (b) Write short notes on Catheter tip transducer.
7. What is catheterization? Describe right, retrograde and transseptal catheterization.
8. What are the features of a differential amplifier used in biomedical instrumentation? How the linearity and the frequency response of the amplifier are is improved?