22-02-2013, 11:56 AM
To design All Pass filter using OPAMP and to plot its frequency response
To design All Pass filter.docx (Size: 29.26 KB / Downloads: 19)
OBJECTIVE:-To design All Pass filter using OPAMP and to plot its frequency response.
(I) PRACTICAL SIGNIFICANCE: - ALL pass filters is used in communication system.
(II) COMPETENCY/SKILL: - Design and testing.
(III) EXPERIMENT OBJECTIVE: - To design All Pass filter using OPAMP and to plot its frequency response.
(IV)THEORETICAL BACKGROUND: -
All pass filters is widely used in industry, a more descriptive name would be the phase filter because the filter shifts the phase of the output signal without changing the magnitude. Another descriptive title would be the time delay filter, since time delay is related to a phase shift.
The all pass filter has a constant voltage gain for all frequencies. This type of filter is useful when we want to produce a certain amount of phase shift for a signal without changing the amplitude.
Figure shows a first –order all pass lag filter. It is first order
PROCEDURE: -
1. Now connect the circuit as per diagram.
2. Apply sinusoidal input signal of constant amplitude (Vin) to the input terminal of the circuit.
3. Vary the input frequency from 10 Hz (keep Vin constant) in steps & note corresponding peak to peak amplitude of output (Vo).
4. Calculate voltage gain and tabulate the reading as per observation table.
5. Plot the frequency response curve for the filter and find out the cut off frequency of the filter.
CONCLUSION:
(XIII) EXPERIMENT RELATED QUE.: -
1. Give the T.F. of all pass filters.
2. Give advantages of all pass filters.
3. Give frequency response of all pass filters.