Ringing suppression circuit
AssigneeDenso Corporation
InventorsTakuya HONDA, Tomohisa KISHIGAMI
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Abstract
A control unit of a suppression circuit turns on an inter-line switching element and maintains an ON state upon detection of a change in the level of a differential signal from high level to low level, and cancels the ON state after a predetermined period of time is measured. A continuous activation prevention unit sets a predetermined mask time period from the time of turning on the inter-line switching element, and masking is performed to prevent the control unit from detecting a change in the level of the differential signal from the high level to the low during the mask time period.
Claims12
A ringing suppression circuit connected to a transmission line to suppress ringing caused by the transmission line transmitting a differential signal using a pair of signal lines, the differential signal varying between a high level and a low level, the pair of signal lines including a high potential signal line and a low potential signal line, the ringing suppression circuit comprising:
- an inter-line switching element that is connected between the pair of signal lines;
- a control unit for turning on the inter-line switching element to fix an ON state when detecting that the differential signal has changed from the high level to the low level, and releasing the ON state after measuring a predetermined ON time period;
- and
- a continuous activation prevention unit for setting a predetermined mask time period from time of turning on the inter-line switching element by the control unit, and masking the control unit not to detect a change of the differential signal from the high level to the low level during the predetermined mask time period.
Dependencies are inferred from the claim text.