METHOD AND APPARATUS TO LIMIT THE TRANSIENT PEAK OF PASSIVE FILTERS IN CIRCUIT BREAKERS

摘要

The present disclosure provides an apparatus to limit transient peak of a original signal in circuit breaker of a signal conditioning circuit (SCC) that includes at least one air core sensor 206, such as rogowski coil, optimally connected to a filter stage 202 that includes a passive filter configured to output a reduced gain as the original signal, wherein an amplification stage 204 can be configured to compensate for the loss in the original signal amplitude caused by the passive filter 202; and at least one buffer 402, such as unity gain buffer, between the filter stage 202 and the amplification stage 204, wherein the at least one buffer 402 can isolate the filter stage 202 and amplification stage 204 while not altering the gain of the SCC, and modifies the original signal in an inverting terminal of the amplification stage 204 so as to limit the transient peak.