There are 45 circuit schematics available in this category. Click here for all circuit diagrams. The Last circuit was added on Saturday, January 28, 2023.Please note some adblockers will suppress the schematics as well as the advertisement so please disable if the schematic list is empty.

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CircuitCategoryDate AddedOK?Votes 
Filters for the RadioJove ReceiverFilter Status0 vote up vote down
Low pass filter for subwooferFilter Status3 vote up vote down
Fourth order Butterworth BPF circuit diagram and design notesFilterJun 19, 2024Status-2 vote up vote down
Chebyshev low pass filter, rolls of at 30MHzFilterJun 19, 2024Status0 vote up vote down
Collection of quartz crystal ladder filter circuit diagramsFilterOct 07, 2024Status-1 vote up vote down
45 to 90Hz hum filter circuit diagramFilterSep 13, 2024Status0 vote up vote down
1KHz 4th order Butterworth filter using LT1367 quad operational amplifierFilterJul 03, 2024Status0 vote up vote down
20KHz Butterworth active filter using Linear Technology LT1124, LT1355 or LT1169FilterMay 25, 2024Status0 vote up vote down
'A' Weighting Filter For Audio MeasurementsFilterSep 13, 2024Status0 vote up vote down
Multiple Feedback Bandpass FilterFilterNov 01, 2024Status0 vote up vote down
Active bandpass filter with TDA2320AFilter Status1 vote up vote down
Higher Order Analog Butterworth Filter Designs, includes on-line filter calculatorFilterJan 16, 2025Status-1 vote up vote down
4th Order Butterworth filter schematic and calculatorFilterJan 16, 2025Status-1 vote up vote down
Sallen-Key Low Pass Filter Calculator (handles Butterworth filters, Bessel filters and Chebychev)FilterJan 16, 2025Status0 vote up vote down
3KHz low-pass filter plus audio amp (PDF)FilterJan 26, 2025Status2 vote up vote down
Series Notch Fliter Designer / Calculator (displays circuit diagram after calculation)FilterJan 16, 2025Status0 vote up vote down
Analog Filters for Data Conversion (ADC filter)FilterJan 16, 2025Status0 vote up vote down
RC Low-Pass Filter with Op Amp Buffer (single pole filter) with SPICE simulation filesFilterJan 17, 2025Status0 vote up vote down
Sallen-Key Low-Pass Filter (Double-Pole) with SPICE simulation filesFilterJan 17, 2025Status0 vote up vote down
Active bandpass filtersFilterNov 01, 2024Status1 vote up vote down
Bandpass filtersFilterNov 01, 2024Status-1 vote up vote down
A-weighting filter from an old Ampex service manualFilterMay 07, 2024Status0 vote up vote down
3 KHz low pass filter plus audio amplifier circuit diagramFilterApr 14, 2024Status1 vote up vote down
Sallen-Key Active Butterworth High Pass Filter Calculator and circuit diagramFilterJan 16, 2025Status0 vote up vote down
Sallen-Key Active Butterworth Low Pass Filter Calculator and circuit diagramFilterJan 16, 2025Status0 vote up vote down
Chebyshev / Butterworth filtersFilterJun 13, 2024Status0 vote up vote down
Biquad Active Bandpass Filter SchematicFilterNov 01, 2024Status-1 vote up vote down
Digital signal processor (DSP) for radio communicationsFilterJun 06, 2024Status0 vote up vote down
29.85 MHZ bandpass filter schematicFilterNov 01, 2024Status1 vote up vote down
29.85 MHZ notch filter schematicFilterNov 01, 2024Status0 vote up vote down
Variable notch filter with both high and low pass filtersFilterSep 13, 2024Status0 vote up vote down
LC filter design on-line calculatorFilterJun 13, 2024Status0 vote up vote down
300 Hz - 3 kHz Microphone FilterFilterSep 07, 2024Status0 vote up vote down
Variable CW Bandpass FilterFilterSep 07, 2024Status0 vote up vote down
Dynamic Noise FilterFilterSep 07, 2024Status-1 vote up vote down
40dB Audio Notch FilterFilterSep 07, 2024Status0 vote up vote down
Tunable Audio FilterFilterSep 07, 2024Status1 vote up vote down
Baxandall Audio FilterFilterSep 28, 2024Status1 vote up vote down
Active Audio BPF 1kHz BandwidthFilterSep 28, 2024Status0 vote up vote down
CW Filter - DL7HGFilterSep 28, 2024Status-1 vote up vote down
Variable Audio Notch Filter - K4VIZFilterSep 28, 2024Status1 vote up vote down
Simple FET Audio FilterFilterSep 28, 2024Status0 vote up vote down
2 GHz - 7 GHz Wideband BPFFilterOct 17, 2024Status0 vote up vote down
900 MHz Trisection Microstrip BPFFilterOct 17, 2024Status0 vote up vote down
Active BPF 741 - WA5SNZFilterOct 22, 2024Status0 vote up vote down