Communication system and communication apparatus
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United States of America Patent
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Aug 13, 2019
Grant Date -
Jan 18, 2018
app pub date -
Apr 1, 2015
filing date -
Apr 1, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A communication system comprises a communication device and communication devices. The communication device comprises a direct current power supply and a transmitter configured to transmit data by control of a current flowing through a current loop. The communication devices comprise a receiver configured to receive data by detection of the current flowing through the current loop. The communication device comprises an adjuster configured to adjust the impedance between a signal line and a common line according to the number of communication devices.
First Claim
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International Classification(s)
- H04M:TELEPHONIC COMMUNICATION
- H04L:TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAP....
- H02M:APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEE....
- H04Q:SELECTING
- H04B:TRANSMISSION
- H03H:IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONA....
- F24F:AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION;....
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