A rs232 communication interface circuit supporting hot plugging

A communication interface circuit, hot-swappable technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problem of unbalanced development of semiconductor technology in the replacement speed, achieve enhanced level matching ability, wide voltage range, and improve transmission capacity Effect

Active Publication Date: 2022-04-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason for this is the imbalance between the replacement speed of PCs and the development of semiconductor technology.

Method used

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  • A rs232 communication interface circuit supporting hot plugging
  • A rs232 communication interface circuit supporting hot plugging
  • A rs232 communication interface circuit supporting hot plugging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, the entire operation process in actual use is divided into two parts: the insertion process and the level conversion process. During the insertion process of the serial port device, the voltage signal of the input power supply B is followed by the voltage signal, and then the surge voltage and the surge current are suppressed. suppression. It takes a certain amount of time from the insertion of the serial port device into the circuit to suppress the surge voltage and surge current, and it will not immediately supply power to the signal buffer and inverter, that is, the power obtained at this time is a stable VccA. Power supply B supplies power to the primary signal buffer, secondary signal buffer, primary signal inverter, and secondary signal inverter of the Tx_A transmission path, and also supplies the primary signal buffer and secon...

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Abstract

The invention discloses a RS232 communication interface circuit that supports hot swapping. The interface circuit uses a high-speed operational amplifier as a core device, and is equipped with corresponding peripheral devices to form a voltage buffer; a three-stage tube is used as an inverter, and the phase is reversed twice consecutively. , obtain the same phase transmission level, and also realize the wide voltage range of the interface circuit, meet the requirements of the RS232 communication frequency band, realize the hot swap of the serial port circuit, and meet the voltage requirements between different devices and different signal levels. The power supply circuit of the interface circuit can follow the input voltage, and can overcome the surge voltage and surge current during the hot swapping process. The invention has high integration degree, small volume, simple circuit connection mode and low failure rate. In the case of failure, it can also facilitate fault detection and analysis, and troubleshoot and repair. The invention can be used in the transmission of different signal levels of each RS232, and has level conversion, signal buffering, hot plug function and high reliability.

Description

technical field [0001] The invention belongs to the field of interface communication, in particular to an RS232 communication interface circuit supporting hot plugging. Background technique [0002] After the use and development of serial communication interface standards, there are currently the following types. RS232, RS422 and RS485 are all serial data interface standards. They were originally formulated and released by the Electronics Industries Association (EIA). RS232 was released in 1962 and named EIA-232-E as an industrial standard to ensure that products from different manufacturers Compatibility between. The standard was originally formulated as a remote communication connection between data terminal equipment DTE (Data Terminal Equipment) and data communication equipment DCE (Data Communication Equipment). Therefore, the formulation of this standard did not consider the application requirements of computer systems. But at present, it is widely used as a near-end...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/40
CPCG06F13/4072G06F13/4081G06F2213/0002
Inventor 孟中杰邓远旺黄攀峰刘正雄贾程张夷斋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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