1 / 10

# Cascaded Filters - PowerPoint PPT Presentation

Cascaded Filters. Approximate and Exact Solutions. 2 stage lpf. Second stage: R 2 = 500 k W C 2 = 1 m F. Ratios: R 2 / R 1 = 10 C 2 / C 1 = 1/10. First stage: R 1 = 50 k W C 1 = 10 m F. 1-stage vs. 2-stage. (dB). ( deg ). Approximate solution. (dB). ( deg ).

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Approximate and Exact Solutions

2 stage lpf
• Second stage:
• R2 = 500 kW
• C2 = 1 mF
• Ratios:
• R2/R1 = 10
• C2/C1= 1/10
• First stage:
• R1 = 50 kW
• C1 = 10 mF
They’re practically the same...

(dB)

Provided you design properly

with Rule of 10x

(deg)

Get rid of bieber

• Beauty and the Beat
• Sweet bass line (f <= 150 Hz)
• Screechy Bieber vocals (f >= 450 Hz)
• Raw song SNR = Bass/Bieber = ½
• Design a circuit that:
• increases SNR >= 2
• keeps phase shift for bass frequencies |f|<= 80 deg.