An anti-emi LIN bus signal driver

A bus signal and driver technology, applied in electrical components, electronic switches, reliability improvement and modification, etc., can solve problems such as bus signal distortion, and achieve the effect of small input impedance, improved controllability, and improved maximum driving capability

Inactive Publication Date: 2016-08-31
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of anti-EMI LIN bus signal driver, is used to solve the problem that bus signal takes place serious distortion in the prior art

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  • An anti-emi LIN bus signal driver
  • An anti-emi LIN bus signal driver
  • An anti-emi LIN bus signal driver

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Embodiment Construction

[0026] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...

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Abstract

The invention provides an anti-EMI LIN bus signal driver which comprises a slope control unit which is connected with a signal input end to control the slope of the input signal of the signal input end through charge and discharge currents, a rail-to-rail output buffer unit connected with the slope control unit, a transconductance amplifying unit connected with the slope control unit and the rail-to-rail output buffer unit, and a driving output unit connected with the transconductance amplifying unit. The anti-EMI LIN bus signal driver uses a PMOS-type transistor to maximize the voltage at the input end of the driving output unit to VCC, so the maximum driving capability of a driving circuit is improved. Because a transconductance operational amplifier with a low input impedance is used, the small equivalent input impedance and the high resistance to EMI at the input end of the driving output unit are guaranteed, the voltage at the input end of the driving output unit has strong capacity of following signals because of the negative feedback mode, and the controllability of signal slope is improved.

Description

technical field [0001] The invention relates to the field of automotive electronics, in particular to the field of microelectronics and solid-state electronic technology and anti-electromagnetic interference of integrated circuits, in particular to an anti-EMI LIN bus signal driver used for communication between electronic devices inside the automobile. Background technique [0002] LIN (Local Interconnection Network) bus is a new serial communication network with simple structure and flexible configuration. It is mainly used in the communication between many electronic control units in the car, and provides auxiliary functions for the fieldbus (such as CAN bus) widely used in the automotive industry. Due to the harsh electromagnetic environment in the car, it is often subject to high electromagnetic interference (Electromagnetic Interference, EMI), which makes the bus signal output by the LIN bus driver severely distorted, resulting in communication errors. [0003] The an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/003H03K17/16H03K19/0175
Inventor 张正民李建朋金星宁振球俞跃辉
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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