Filter Schematics

1. 12dB / Octave Linkwitz Riley Crossover
2. 2-Way Electronic Crossover Network
3. 20 Hz audio bandpass filter
4. 29.850 MHz Bandpass Filter
5. 29.85 MHZ notch filter schematic
6. 3KHz LOW PASS FILTER & AUDIO AMP (PDF)
7. 3-Way Active Crossover
8. 500 Hz Active Filter
9. Active band pass filter
10. "A" Weighting Filter For Audio Measurements
11. A-weighting filter
12. Audio Notch Filter
13. Bandpass and I.F. Filter Information
14. Bass Crossover
15. CHEBYSHEV/BUTTERWORTH FILTER DESIGN
16. CW FILTERS
17. Digitally Control Phase Shift
18. Economical, DC Accurate, Active RC Lowpass Filter
19. Frequency Response of a Bandpass Filter
20. Galaxy Noise Filter
21. Helical Resonator Notch Filter
22. Inversal notch and bandpass filter
23. Klunky Schematic Generated
24. LC Filter Design
25. Low Pass Active Filters (PDF)
26. Low-Pass Active Filter
27. Multiple Feedback Bandpass Filter
28. RC Active Lowpass Filter
29. RC Notch Filter (Twin T)
30. SSB AF FILTER
31. SELF-TUNING CW FILTER
32. Schematics of Various Tubed Crossovers
33. Voltage Controlled State Variable Filter