22-02-2013, 11:47 AM
To design a HPF using R & C and to study its characteristics
To design a HPF.docx (Size: 15.41 KB / Downloads: 20)
OBJECTIVE: - To design a HPF using R & C and to study its characteristics
(I) PRACTICAL SIGNIFICANCE: - HPF filter is used in communication system in signal processor.
(II) COMPETENCY/SKILL: - Design and testing.
(III) EXPERIMENT OBJECTIVE: -
To design a HPF using R & C and to study its characteristics
(IV) THEORETICAL BACKGROUND: -
High pass filters are often formed simply by interchanging frequency determining resistors and capacitors in low pass filters. That is, a first order high pass filter is formed from a first order low pass type by interchanging components R and C. Fig. Shows a first order high pass butter worth filter with a low cutoff frequency fC. This is the frequency at which the magnitude of the gain is 0.707 times its pass band value. Obviously, all frequencies higher than fC are pass band frequencies, with the highest frequency determined by the closed loop bandwidth of the op-amp.
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.