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A Bidirectional Communication Interface Circuit Based on Current Sampling

A technology of current sampling and two-way communication, which is applied in the direction of data switching current source, electrical components, data exchange details, etc., to achieve the effect of communication function

Active Publication Date: 2021-03-09
SUZHOU R&D CENT OF NO 214 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In some product circuits, there is usually only a power supply line, but the power supply line is required to be able to provide power to the product and realize two-way data communication to the product. The existing serial communication protocol transmission based on RS485 / 422 / 232 The data scheme cannot be realized, and a dedicated interface circuit needs to be developed

Method used

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  • A Bidirectional Communication Interface Circuit Based on Current Sampling
  • A Bidirectional Communication Interface Circuit Based on Current Sampling
  • A Bidirectional Communication Interface Circuit Based on Current Sampling

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0023] Depend on figure 1 As shown, a bidirectional communication interface circuit based on current sampling in the present invention includes two parts, namely: a data sending driving circuit 1 and a data receiving driving circuit 2 . The communication bus implements power supply, data sending and receiving functions. Among them, the data transmission drive circuit 1 realizes output power supply and data transmission, and provides working energy for the normal operation of the main control unit of the circuit; the data reception drive circuit 2 converts the response data on the communication bus into a voltage signal through current sampling, and passes through the differential amplifier circ...

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Abstract

The invention discloses a bidirectional communication interface circuit based on current sampling, which includes a data transmission drive circuit and a data reception drive circuit; the data transmission drive circuit outputs power supply and transmits data signals; The sampling resistor is converted into a voltage signal, and after the voltage signal is amplified, compared with the threshold voltage, it is converted into a level signal that can be recognized by the controller. The bidirectional communication interface circuit based on current sampling provided by the present invention is based on the existing power supply line, and can realize bidirectional data transmission between the outside world and the main control system of the product without adding additional connections, thereby realizing the communication function.

Description

technical field [0001] The invention relates to a bidirectional communication interface circuit based on current sampling, belongs to the technical field of data communication, and can be applied to various instruments and meters based on power supply line data communication. Background technique [0002] Communication technology includes wireless communication and wired communication. Wired communication is widely used due to its advantages of no external environment interference, simple circuit structure, and high communication reliability. Wired communication usually uses serial communication protocols such as RS485 / 422 / 232 to transmit data. Standard integrated circuits are used as signal drivers. The voltage on the communication signal transmission line is kept within the standard range, and the data transmission rate is high and the transmission distance is long. [0003] In some product circuits, there is usually only a power supply line, but the power supply line is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/10H04Q1/02
CPCH04L12/10H04Q1/028H04Q1/03
Inventor 张建新梁宛玉贾丹丹杨翠侠李坤
Owner SUZHOU R&D CENT OF NO 214 RES INST OF CHINA NORTH IND GRP
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