The host device of the two-bus communication circuit and the two-bus communication circuit

Abstract

The present application discloses a host device for a two-line communication circuit. The host device comprises: a host controller, a switching unit configured to output a power supply voltage under the control of the host controller, an output modulating unit configured to adjust, under the control of the host controller, the power supply voltage to an output voltage representing communication data for outputting for set time, and connected to the host controller and the switching unit, and a return code detecting unit comprising a current transformer, wherein a secondary winding for the current transformer generates a proportional inductive current as a communication signal when the current flowing through the primary winding of the current transformer changes, and the host controller identifies the communication signal to obtain communication contents of a slave device, thereby achieving two-way communication with the slave device. The present application also discloses a two-line communication circuit. According to the present application, communication between the host device and the slave device can be guaranteed host device for a two-line communication circuit with effective improved anti-jamming capability of communication and significantly reduced circuit loss.

Description

Technical field [0001] This application relates to the field of communication technologies, and in particular to a host device of a two-bus communication circuit and a two-bus communication circuit. Background technique [0002] In the prior art, the two-bus circuit uses two transmission lines to connect the master and several slaves to realize power supply and communication between the master and the slaves. The master device controls the two buses to output pulse modulation signals of different voltage values, and the decoding circuit of the slave machine parses out the control commands of the master from the pulse modulation signal sent by the master. After the slave executes the command, the code return circuit works and changes the current value of the bus. The host side connects a sampling resistor in series with the two buses. When the current on the bus changes, the voltage across the sampling resistor will change. This voltage signal is recognized by the host's microcont...

AI Technical Summary

Problems solved by technology

[0004] This application provides a master device and a two-bus communication circuit of a two-bus communication circuit, which can solve the problem that the current two-bus communication circuit cannot work normally due to the increase of slave devices affecting the power supply voltage of the slave devices, and the master device cannot Normally recognize the response signal of the slave device, and there is electromagnetic clutter interference when the master device and the slave device communicate over a long distance, and the circuit loss will be increased due to the increase of the current on the bus due to the sampling resistor

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