1. Engineering
  2. Electrical Engineering
  3. in your spare time you enjoy building electrical circuits typically...

Question: in your spare time you enjoy building electrical circuits typically...

Question details

In your spare time you enjoy building electrical circuits, typically you use a battery to power these circuits; however, recently you have noticed some unpredictable results and have concluded that there must be a problem with the battery i) To test the performance of the battery you have used a potentiometer, voltage 2. a) 3 probe and oscilloscope to create the plot shown in Figure Q2-1. Using the plot, create a model for the battery comprising of an ideal voltage source and series resistance 10- Voltage-- across terminals 6- Current drawn (mA) 0 10 20 30 40 50 60 Figure 01-2 b) From the model you constructed in part ai, it is clear that the battery is no longer suitable to power your circuits. As an alternative youve decided to construct your own DC power supply using a circuit you found in a text book, shown in Figure Q2-2. Each capacitor used has a maximum voltage rating of 20 volts. i) All of the components to the left hand side of the 22 Ω resistor can be grouped together and considered as a single 34 V ideal voltage source. Redraw the circuit showing this voltage source and determine what the current flow through the 22 2 resistor would be if the terminals were to be shorted together i) When using the DC power supply you notice a considerable level of voltage 6 ripple on the output, this suggests that the smoothing capacitance at the output of your power supply is insufficient. You decide to replace the 10 uF capacitor with a 47 μF to improve the situation. The only 47 μF capacitor available has a maximum voltage rating of 15V, is it safe to use you have his capacitor in series with the existing 22 μF capacitor? PAPER O ELEC142 F 7 F8 F9

02 Continued. 222 34 VDc 10:1 22 uF Fuse 240 VAC 50Hz 24 VAC Figure 02-2 b) To enable the output voltage of your DC power supply to be varied, you have decided to modify the original circuit by adding an operational amplifier in a feedback loop. 1) State the golden rules of operational amplifiers, sketch the equivalent6 circuit of a generic amplifier and describe the key characteristics of an ideal operational amplifier Design an inverting operational amplifier circuit with a system gain of 6 i) Sketch circuit designs for a non-inverting amplifier and a buffer Total 25 F9

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution