There are 33 circuit schematics available in this category. Click here for all circuit diagrams. Last circuit added on Thursday, 30 July 2015.

Filter schematics by description:

CircuitCategoryDate AddedOK?Votes 
Design of active filters with operational amplifiers (includes circuit and Java filter calculator)FilterJan 16, 20100
Filters for the RadioJove ReceiverFilter 0
Low pass filter for subwooferFilter -1
Fourth order Butterworth BPF circuit diagram and design notesFilterJun 19, 20110
Chebyshev low pass filter, rolls of at 30MHzFilterJun 19, 20110
Collection of quartz crystal ladder filter circuit diagramsFilterOct 07, 20090
45 to 90Hz hum filter circuit diagramFilterSep 13, 20060
1KHz 4th order Butterworth filter using LT1367 quad operational amplifierFilterJul 03, 20110
20KHz Butterworth active filter using Linear Technology LT1124, LT1355 or LT1169FilterMay 25, 20120
'A' Weighting Filter For Audio MeasurementsFilterSep 13, 20060
Multiple Feedback Bandpass FilterFilterNov 01, 20020
Active bandpass filter with TDA2320AFilter 0
Higher Order Analog Butterworth Filter Designs, includes on-line filter calculatorFilterJan 16, 20100
4th Order Butterworth filter schematic and calculatorFilterJan 16, 20100
Sallen-Key Low Pass Filter Calculator (handles Butterworth filters, Bessel filters and Chebychev)FilterJan 16, 20100
3KHz low-pass filter plus audio amp (PDF)FilterJan 26, 20010
Series Notch Fliter Designer / Calculator (displays circuit diagram after calculation)FilterJan 16, 20100
Analog Filters for Data Conversion (ADC filter)FilterJan 16, 20100
RC Low-Pass Filter with Op Amp Buffer (single pole filter) with SPICE simulation filesFilterJan 17, 20110
Sallen-Key Low-Pass Filter (Double-Pole) with SPICE simulation filesFilterJan 17, 20110
Active bandpass filtersFilterNov 01, 20020
Bandpass filtersFilterNov 01, 20020
A-weighting filter from an old Ampex service manualFilterMay 07, 20100
3 KHz low pass filter plus audio amplifier circuit diagramFilterApr 14, 20100
Sallen-Key Active Butterworth High Pass Filter Calculator and circuit diagramFilterJan 16, 20100
Sallen-Key Active Butterworth Low Pass Filter Calculator and circuit diagramFilterJan 16, 20100
Chebyshev / Butterworth filtersFilterJun 13, 20020
Biquad Active Bandpass Filter SchematicFilterNov 01, 20020
Digital signal processor (DSP) for radio communicationsFilterJun 06, 20030
29.85 MHZ bandpass filter schematicFilterNov 01, 20020
29.85 MHZ notch filter schematicFilterNov 01, 20020
Variable notch filter with both high and low pass filtersFilterSep 13, 20060
LC filter design on-line calculatorFilterJun 13, 20020