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1. 1. NATIONAL COLLEGE OF SCIENCE AND TECHNOLOGY Amafel Building, Aguinaldo Highway Dasmariñas City, Cavite Experiment No. 3 ACTIVE LOW-PASS and HIGH-PASS FILTERSBani, Arviclyn C. July 14, 2011Signal Spectra and Signal Processing/BSECE 41A1 Score: Engr. Grace Ramones Instructor
2. 2. OBJECTIVES: Plot the gain-frequency response and determine the cutoff frequency of a second-order (two-pole) low-pass active filter. Plot the gain-frequency response and determine the cutoff frequency of a second-order (two-pole) high-pass active filter. Determine the roll-off in dB per decade for a second-order (two-pole) filter. Plot the phase-frequency response of a second-order (two-pole) filter.
3. 3. SAMPLE COMPUTATIONS:Computation of voltage gain based on measured value: Step 3 AdB = 20 log A 4.006 = 20 log A Step 14 AdB = 20 log A 3.776 = 20 log A A = 1.54Computation of voltage gain based on circuit: Step 4Computation of percentage difference: Q in Step 4 Q in Step 6 Q in Step 15Computation of cutoff frequency: Step 6 and 17 Step 11