Analog Filter Wizard™ v1.0

Design & Product Selection Tool

Definition of terms
Power SupplyPower supply definition goes here.
Common Mode VoltageCommon Mode Voltage definition goes here.
Input Signal LevelInput Signal Level definition goes here.
GainGain definition goes here.
FoCenter frequncy for bandpass filter.s
FcCutoff frequency for highpass and lowpass filters.
Q"Quality factor" of the filter. Q is directly related to peaking in the individual sections.
ResistanceThe impedance at DC.
ReactanceThe impedance at frequencies other than DC.
αThe damping ratio. Which is the inverse of Q (1/Q) (the quality factor Q).
Filter TypeThis describes the transfer function of the filter: Lowpass, highpass or bandpass
HighpassPasses frequencies above the cutoff, atenuates those below.
LowpassPasses frequencies below the cutoff, atenuates those above.
BandpassPasses frequencies around the center frequency, attenuates those on either side.
Filter ResponseThis describes the transfer function of the filter as it relates to amplitude and phase response. Standard responses that we support are Bessel, Butterworth, Chebyshev (0.01 dB to 1 dB), Equiripple (0.05° & 0.5°), Gaussian (6 dB & 12 dB).
Filter OrderDescribes the attenuation rate. Each degree in the order provide 6 dB/octave (or 20 dB/decade) attenuation and 180° phase shift.
Filter TopologyDecribes the actual circuit schematic.
HFilter gain (can also be called A).
AFilter gain (can also be called H).
SThis is =jω. Filters are often described by the response in the s plane. The degree of s is the order of the filter.
ωThe frequency in radians/sec. = 1/2π the frequency in Hertz.
HertzThe frequency in cycles/sec.
AmaxThe maximum ripple in the amplitude of the filter in the passband.
AminThe minimum attenuation in the stopband.
Fmax[Fmax info goes here]
FsThe edge of the stopband.
PassbandThe band in which the signal remains unattenuated.
StopbandThe band beyond Fs. This is the band where the response of the filter never exceedes the minimum attenuation (Amin).
Transition bandThe band between the [passband and the stopband.
Transfer functionThe frequency response of a function or circuit. Usually given in terms of s.

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