1. Aim Page 3
2. Equipment Page 4
3. Circuit Diagrams Page 6
4. Method/Procedure Page 7
4. Conclusion Page 9
For this assignment I aim to accomplish a better understanding of an RC filter (Resistor Capacitor) which is a circuit that comprises of at least one capacitor and resistor and the circuit must also be driven by a voltage or current source. Understanding this will enable me to demonstrate my knowledge based on this report about Resistor Capacitor Filters.
For the experiment, we were provided with five different types of equipment. The electronic equipment that we used was indeed very essential in order ...view middle of the document...
➢ Low Pass Filter Circuit
In the first circuit we connected the oscilloscope and the signal generator together using the 2 cables. We then connected the rest of the circuit using the four wires so that the resistance decade box was set in series whilst the capacitor is set parallel which is an essential set up for a low pass filter circuit.
➢ High Pass Filter Circuit
In the second circuit again we connected the oscilloscope and the signal generator together using the 2 cables. We then connected the rest of the circuit using the four wires however this time the resistance decade box and capacitor have switched places meaning that the capacitor was connected in series whilst the resistance decade box is set parallel making this circuit a high pass filter.
In both of the circuits we set the resistance decade box to a resistance of 1 kilohms and the capacitor to 0.1 microfarads. This was done on both circuits in order to maintain a fair experiment with the only difference being that circuit 1 was a low pass filter and circuit 2 was a high pass filter.
For each circuit we introduced the same amount of frequency. There were 10 different frequencies starting from 100 Hertz and ending at 20 Kilohertz. Although we had changed the frequency after each result we had kept the voltage the same at 1 volt. Using the oscilloscope as a visual representation we measured and recorded the voltage that came out.
|Circuit 1 | | | | |
|Frequency, Hz |Voltage in |Voltage out |Gain |Decibel Gain (dB) = |
| |= Vin |= Vout |= Vout/Vin |20log10 Vout / Vin |
|100 Hz |1 |1 |1 |0 |
|200 Hz |1 |1 |1 |0 |
|400 Hz |1 |1 |1 |0 |
|1 kHz |1 |0.8 |0.8 |-1.9 |
|1.5 kHz |1 |0.7 |0.7 |-3.1 |
|2 kHz |1 |0.6 |0.6 |-4.4 |
|4 kHz |1 |0.36 |0.36 |-8.9 |
|10 kHz |1 |0.16 |0.16 ...