Active Filters ENGI 242 ELEC 222

January 2004ENGI 242/ELEC 2222 First Order Low Pass Filter

January 2004ENGI 242/ELEC 2223 Second Order Low Pass Filter

January 2004ENGI 242/ELEC 2224 Low Pass Filter Determine f r and A V

January 2004ENGI 242/ELEC 2225 High Pass Filter

January 2004ENGI 242/ELEC 2226 High Pass Filter Determine f r and A V

January 2004ENGI 242/ELEC 2227 Bandpass Filter

January 2004ENGI 242/ELEC 2228 Bandpass Filter Output

January 2004ENGI 242/ELEC 2229 Bandpass Filter

January 2004ENGI 242/ELEC Bandpass Filter

January 2004ENGI 242/ELEC Notch Filter f CH < f CL

January 2004ENGI 242/ELEC Butterworth Low Pass Filter Schematic

January 2004ENGI 242/ELEC Properties for VPRINT/Special1 Click on VPRINT1 (the printer symbol on the schematic) Edit Properties Place a Y in every column entry you want entered in netlist

January 2004ENGI 242/ELEC Butterworth Low Pass Netlist of V DB(OUT) FREQ VM(OUT) VP(OUT) VDB(OUT) 1.000E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E-02 Look for frequency where V DB(OUT) has declined by -3dB And where VM(OUT) has declined to.707 VM(OUT)max

January 2004ENGI 242/ELEC Butterworth Low Pass Filter Probe Output Look for the frequency where output has declined 3dB from the maximally flat value

January 2004ENGI 242/ELEC Second Order Low Pass Filter Schematic

January 2004ENGI 242/ELEC Second Order Netlist Output FREQ VM(OUT) VP(OUT) VDB(OUT) 1.000E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E+01

January 2004ENGI 242/ELEC Second Order Low Pass Probe Output

January 2004ENGI 242/ELEC Third Order Low Pass Filter Schematic

January 2004ENGI 242/ELEC Third Order Low Pass Probe Output

January 2004ENGI 242/ELEC Fourth Order Low Pass Filter Schematic

January 2004ENGI 242/ELEC Fourth Order Low Pass Probe Output

January 2004ENGI 242/ELEC Butterworth High Pass Filter Schematic

January 2004ENGI 242/ELEC Netlist Output for Butterworth High Pass FREQ VM(OUT) VP(OUT) VDB(OUT) 1.000E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E+00

January 2004ENGI 242/ELEC High Pass Probe Output

January 2004ENGI 242/ELEC Second Order High Pass Schematic

January 2004ENGI 242/ELEC Second High Pass Probe Output

January 2004ENGI 242/ELEC Butterworth Bandpass Filter Schematic

January 2004ENGI 242/ELEC Netlist Output for Bandpass FREQ VM(OUT) VDB(OUT) 3.511E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E+00

January 2004ENGI 242/ELEC Bandpass Probe Output

January 2004ENGI 242/ELEC Narrow Bandpass Filter Schematic

January 2004ENGI 242/ELEC Netlist Output for Narrow Bandpass FREQ VM(OUT) VP(OUT) VDB(OUT) 1.000E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E+01

January 2004ENGI 242/ELEC Narrow Bandpass Probe Output