Operational Amplifier Applications Unit 3 – Low Pass Filter
These response curves show the attenuation rates for first, second, and third order Butterworth
low pass filters.
NEW TERMS AND WORDS
overshoot - the amount by which a signal exceeds its final value.
undershoot - the amount by which a signal exceeds its final value in a direction opposite to the
main transition.
ringing - a damped oscillation in a circuit's output signal resulting from a sudden change in the
input signal.
settle time - the time required for ringing to diminish to a specific level.
damping - reduction of amplitude in oscillations.
overdamped - damped beyond the critically damped level.
critically damped - condition of a filter in which the damping level provides this.
EQUIPMENT REQUIRED
F.A.C.E.T. base unit
Oscilloscope, dual trace
Signal Generator
OPERATIONAL AMPLIFIER APPLICATIONS circuit board