Circuitos Eletrônicos de Filtros RF e Áudio

1. "A" Weighting Filter For Audio Measurements
   
2. 29.85 MHZ bandpass filter schematic
   
3. 29.85 MHZ notch filter schematic
   
4. 3KHz low-pass filter plus audio amp (PDF)
   
5. Active 2nd Order Filters
   
6. Active bandpass filters
   
7. Bandpass filters
   
8. Bandpass filters
   
9. Biquad Active Bandpass Filter Schematic
   
10. Butterworth filters
    
11. Chebyshev / Butterworth filters
    
12. Chebyshev Bandpass Filter
    
13. CW filters
    
14. DC Accurate, Active RC Lowpass Filter
    
15. Digital signal processor (DSP) for radio communications
    
16. Filter Circuit for the Earthworm Seismic Data Acquisition System
    
17. Galaxy Noise Filter
    
18. Helical Resonator Notch Filter
    
19. Inversal notch and bandpass filter
    
20. LC filter design
    
21. Low-pass active filter
    
22. Multiple Feedback Bandpass Filter
    
23. Multiple Feedback Bandpass Filter
    
24. Narrow band audio bandpass filter
    
25. RC Notch Filter (Twin T)
    
26. Self-tune filter
    
27. SSB AF filter