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Dc_accurate_low_pass_Bessel_filter

2017-02-21 07:02  
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Dc_accurate_low_pass_Bessel_filter
This circuit uses an LTC1050 and LTC1062 to form a low-cost 7th-order 10-Hz low-pass filter, where amplitude and phase response closely approximate a Bessel filter. The required clock frequency is 2 kHz, which yields a clock-to-cutoff frequency ratio of 200:1. Figure 7-40B shows the characteristics. Linear Technology, Linear Appications Handbook, 1990, p. DN9-1, -2.