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No. 99MBB091A
14. REFERENCE INFORMATION
• Phase correct filters
Output waveforms from the general 2RC filters may be distorted due to phase deviations
that vary with each wavelength.
Shown below are the response of a low-pass filter to square wave input, and that of a high-
pass filter.
Input signal (square wave)
500.00 μm/cm(x 20)
0.20 μm/cm(x 50000)
LPF: PC
500.00 μm/cm(x 20)
0.20 μm/cm(x 50000)
LPF: 2RC
500.00 μm/cm(x 20)
0.20 μm/cm(x 50000)
Low-pass filter
HPF : PC
500.00 μm/cm(x 20) 500.00 μm/cm(x 20)
0.50 μm/cm(x 20000)
HPF : 2RC
0.50 μm/cm(x 20000)
High-pass filter
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