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公开(公告)号：US10778089B2
公开(公告)日：2020-09-15
申请号：US15715708
申请日：2017-09-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yongbin Chu , Yogesh Ramadass , Saurav Bandyopadhyay , Todd Allen Toporski , Jeffrey Anthony Morroni
Abstract: An active electromagnetic interference (EMI) filter includes a first amplifier and a second amplifier. The first amplifier is configured to sense noise signals on a power conductor. The second amplifier is coupled to the first amplifier and is configured to drive a cancellation signal onto the power conductor. The cancellation signal is to reduce the amplitude of the noise signals sensed by the first amplifier. An output impedance of the second amplifier is lower than an output impedance of the first amplifier.
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