FFT Analyzer Basic FAQ
Question number FAQ-0763
What is the relationship between the time constant and the cutoff frequency of a low-pass filter?
The relationship between the cutoff frequency and the time constant is expressed by the following equation:
From the above equation;
| time constant | Cutoff frequency |
|---|---|
1.6 ms | 100 Hz |
3.2 ms | 50 Hz |
6.4 ms | 25 Hz |
16 ms | 10 Hz |
32 ms | 5 Hz |
64 ms | 2.5 Hz |
160 ms | 1 Hz |
Last updated: 2010-12-20