Help Needed: Low Pass Filter Cutoff Frequency Closest to 100 kHz

AI Thread Summary
To achieve a low pass filter cutoff frequency closest to 100 kHz, the discussion focuses on selecting the appropriate resistor and capacitor from the provided options. The formula used for calculating the cutoff frequency is fc = 1 / (2π * R * C). Participants note the importance of correctly interpreting the values for nanofarads (nf) and microfarads (uf), highlighting a common mistake with negative signs in scientific notation. The conversation emphasizes the need for precise calculations to determine the best component combination. Accurate selection of components is crucial for achieving the desired cutoff frequency.
blair321
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hi there

if anyone could help i would be very grateful

for a low pass filter

from the following list choose the two components which would produce a cut off frequency closest to 100 khz

resistor capacitor
1.6 k ohm 1 nf
33 k ohm 330 nf
150 k ohm 10 uf

formula being fc = 1 / 2pi * r * c

its the exact values for nf and uf that are posing the prob
 
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1.6k and 1 nf
 
nf = 10 to the ninth
uf = 10 to the sixth
 
many thanks
 
Originally posted by MaxMoon
nf = 10 to the ninth
uf = 10 to the sixth
I think you forgot some minus signs in there.

- Warren
 
Guess I did.
 

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