30-06-2012, 02:12 PM
To plot the frequency response of constant-k Band pass filter.
To plot the frequency response of constant-k Band pass filter.docx (Size: 21.83 KB / Downloads: 26)
THEORY:
A band pass filter is one which attenuates all frequencies below a lower cut-off frequency fc1 and above an upper cut-off frequency fc2 and passes the rest of frequencies. Constant k- band pass filter consists of two parallel tuned circuits as shown in the
PROCEDURE:
1. Connect sine wave generator at the input of the filter. Adjust sine wave amplitude to 5Volt p-p. Keep the input voltage constant throughout the experiment.
2. Connect CRO at the output of the filter.
3. Vary the input frequency from minimum to 10KHz in proper steps in sine wave generator and every time note the input frequency and corresponding output voltage from the CRO in the observation table.
4. Plot the graph between input frequency & Output Voltage taking input frequency (in Hz) on x-axis and output voltage (in Volts) on y- axis on semi log graph paper.
5. Calculate the cut-off frequencies from the formula as well as from the graph.