FAST RESPONSE HIGH-ORDER LOW-PASS FILTER

摘要

A fast-response high-order low-pass filter circuit is provided. The circuit includes a plurality of low pass filter (LPF) poles that are connected in series, a forward bypass channel that includes a first delta voltage module that conducts at a first predetermined voltage and a first impedance module that provides a first impedance and is in series with the first delta voltage module, and a reverse bypass channel that includes a second delta voltage module that conducts at a second predetermined voltage and a second impedance module that provides a second impedance and is in series with the second delta voltage module. The forward and reverse bypass channels are arranged to bypass current around at least one of the plurality of LPF poles when a voltage difference across the at least one of the plurality of LPF poles exceeds one of the first predetermined voltage and the second predetermined voltage.

主权项

1. A fast-response high-order low-pass filter circuit (32), comprising:
a plurality of low pass filter (LPF) poles (50) that are connected in series; a forward bypass channel (52) that includes a first delta voltage module (56) that conducts at a first predetermined voltage and a first impedance module (58) that provides a first impedance and is in series with the first delta voltage module (56); and a reverse bypass channel (54) that includes a second delta voltage module (60) that conducts at a second predetermined voltage and a second impedance module (62) that provides a second impedance and is in series with the second delta voltage module (60), wherein the forward and reverse bypass channels (52,54) are arranged to bypass current around at least one of the plurality of LPF poles (50) when a voltage difference across the at least one of the plurality of LF poles (50) exceeds one of the first predetermined voltage and the second predetermined voltage.