electrical asignment

Theory Questions - 40 marks

In your report, clearly address the following theory questions. Each answer should be approximately 100 words only in length without relying on diagrams.

1. For an instrumentation amplifier, explain what common mode rejection ratio is and why it should normally have a high value. Be sure to explain how it's value can cause errors in the amplification of an input signal.

2. Balanced inputs are very important for an instrumentation amplifier in order to reduce errors and noise. Explain in detail two (2) different ways in which balanced inputs can help reduce noise highlighting the method and how reduction of noise is achieved at the output of the amplifier.

3. Figure 15 within the data for the OP07 operational amplifier shows how power supply rejection ratio changes with frequency. Explain what this graph means for the instrumentation amplifier you designed. Be sure to explain what it means for different values of frequency.

4. Explain what magnetically-transmitted interference is in simple, practical terms and give an example of a situation where it is likely that magnetic interference is being created.

5. Explain what a ground loop is and explain the implementation of two (2) methods to alleviate the problem.

6. Isolation Amplifiers are one example of an instrumentation amplifier. Describe how this type of specialized works, as well as listing several types of applications where it can be found.

7. Explain the purpose of a frequency compensating capacitor in relation to instrumentation amplifier.

8. Explain how the use of open collector logic gates in the GPIB3 allows the connection of many instruments onto a two-way bus. Additionally, detail why ALL connected instruments must try to pull the bus line to a high voltage to signal that the bus is free.