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Patent Searching and Data


Title:
RINGING SUPPRESSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/039498
Kind Code:
A1
Abstract:
A ringing suppression circuit is provided to a node (2) equipped with a communication circuit (6) that communicates with another node by transmitting a differential signal through a pair of communication lines (3P, 3N). The ringing suppression circuit comprises: a suppression unit (8, 22, 42) in which an impedance element (11, 29, 48) is connected between the pair of communication lines, allowing the suppression unit (8, 22, 42) to perform a suppression operation of suppressing ringing produced when the differential signal is transmitted; and an operation control unit (9, 23, 32, 43, 53) for controlling the operation of the suppression unit, the operation control unit starting the suppression operation performed by the suppression unit once it has been detected that the signal level of the differential signal has changed to recessive. The operation control unit switches the impedance value of the impedance element to a first set value during a first period, which includes the start time of the suppression operation from among a suppression period in which the suppression operation is carried out, and to a second set value higher than the first set value during a second period, which follows the first period.

Inventors:
NAKAMURA SHUICHI (JP)
KISHIGAMI TOMOHISA (JP)
Application Number:
PCT/JP2020/031113
Publication Date:
March 04, 2021
Filing Date:
August 18, 2020
Export Citation:
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Assignee:
DENSO CORP (JP)
International Classes:
H03K17/16; H03K17/687; H04L25/02
Foreign References:
JP2016034080A2016-03-10
JP2016123054A2016-07-07
JP2012257205A2012-12-27
JP2009296568A2009-12-17
JP2000353945A2000-12-19
Attorney, Agent or Firm:
SATO INTERNATIONAL PATENT FIRM (JP)
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