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Multi lowpass filter

Multiple RC lowpass filters with different cutoff frequencies to switch between.

Status

:OK:: tested and working, :Ok:: minor issue/not tested, :no:: defect

# Status Comment
1 :OK:
2 :OK:
3 :OK:
4 :OK:
5 :OK:

Setup

Switch: Elma 01-1104 (with gold inside), Farnell # 1876072

\(f_{c}\): cutoff frequency, \(\tau\): time constant, R: resistance, C: capacitance

\[ f_{c} = \frac{1}{2 \pi \tau} \quad with \quad \tau = RC\]

Cutoff Frequency [Hz ] Time Constant [ms] Capacitance [nF] Capacitor
4.8 33 3300 Wima Foil capacitor
16 10 1000
48 3.3 330
160 1 100
480 0.33 33
1600 0.1 10

Prototype

Multi RC lowpass filters by PTB