Saturday 21 September 2013

Low pass filter


EXPERIMENT N0. 2(A) SECOND ORDER ACTIVE LOW PASS FILTER


AIM: To obtain the frequency response of an active low pass filter for the desired cut off frequency.






PROCEDURE:
1. Before wiring the circuit, check all the components.
2. Design the filter for a gain of 1.586 and make the connections as shown in the circuit diagram.
3. Set the signal generator amplitude to 2v  peak to peak and observe the input voltage and output voltage on the CRO
4. By varying the frequency of input from Hz range to KHz range, note the frequency and the corresponding output voltage across pin 6 of the op amp with respect to the gnd.
5. The output voltage (VO) remains constant at lower frequency range.
6. Tabulate the readings in the tabular column.
7. Plot the graph with ‘f ‘on X-axis and gain in dB on Y axis.

RESULT:




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