High pass filter with coefficient switching to improve settling

Details High pass filter with coefficient switching to improve settling High pass filter with coefficient switching to improve settling

1995-12-29

1998-07-07

Ngo, Chuong Dinh

Boots, shoes, and leggings

36472413, G06F 1710

Patent

active

057779090

ABSTRACT:
A high pass filter is provided utilizing a digital filter with coefficients that can be switched to provide for two responses, a fast response and a slow response. A first response is provided by an accumulator block (38) disposed between the output and a summing junction (30) on the input of the digital filter. A multiplexer (40) selects between this accumulator block (38) and a slow response accumulator block (42). The switching is effected with a zero crossing detect circuit (26). When the first and faster response brings the DC level down to a value that is close to zero, the second and slower response is selected to basically lock it to zero.

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