TRANSMITTER AND TRANSMISSION/RECEPTION SYSTEM
First Claim
1. A transmitter that transmits differential signals to a receiver via differential signal lines having AC coupling capacitors provided in middle of the differential signal lines, the transmitter comprising:
- an output driver configured to output the differential signals to the differential signal lines;
first termination resistors and a first switch, the first termination resistors and the first switch being provided in series between a first reference voltage input terminal and the differential signal lines, a reference voltage being inputted to the first reference voltage input terminal;
a pulse generator configured to output a common-mode pulse to the differential signal lines;
a second switch provided between the differential signal lines and the pulse generator;
a detector configured to detect, after generation of the common-mode pulse starts, timing at which a voltage level of the common-mode pulse exceeds a threshold; and
a controller configured to place the second switch in an on state to connect the pulse generator to the differential signal lines, and power down the output driver and then place the first switch in an off state to allow the pulse generator to output the common-mode pulse to the differential signal lines.
1 Assignment
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Accused Products
Abstract
A transmitter includes: an output driver that outputs differential signals to differential signal lines; first termination resistors and a first switch which are provided in series between a first reference voltage input terminal to which a reference voltage is inputted and the differential signal lines; a pulse generator that outputs a common-mode pulse to the differential signal lines; a second switch provided between the differential signal lines and the pulse generator; a detector that detects, after generation of the common-mode pulse starts, timing at which a voltage level of the common-mode pulse exceeds a threshold; and a controller that places the second switch in an on state to connect the pulse generator to the differential signal lines, and powers down the output driver and then places the first switch in an off state to allow the pulse generator to output the common-mode pulse to the differential signal lines.
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Citations
3 Claims
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1. A transmitter that transmits differential signals to a receiver via differential signal lines having AC coupling capacitors provided in middle of the differential signal lines, the transmitter comprising:
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an output driver configured to output the differential signals to the differential signal lines; first termination resistors and a first switch, the first termination resistors and the first switch being provided in series between a first reference voltage input terminal and the differential signal lines, a reference voltage being inputted to the first reference voltage input terminal; a pulse generator configured to output a common-mode pulse to the differential signal lines; a second switch provided between the differential signal lines and the pulse generator; a detector configured to detect, after generation of the common-mode pulse starts, timing at which a voltage level of the common-mode pulse exceeds a threshold; and a controller configured to place the second switch in an on state to connect the pulse generator to the differential signal lines, and power down the output driver and then place the first switch in an off state to allow the pulse generator to output the common-mode pulse to the differential signal lines. - View Dependent Claims (2, 3)
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Specification