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Edge modulation emitter and digital isolator

A transmitter and edge-triggered technology, applied in the direction of electric pulse generator circuit, differential amplifier to generate pulse, generate electric pulse, etc., can solve the problem of poor accuracy of digital signal modulation

Pending Publication Date: 2021-01-15
重庆线易电子科技有限责任公司
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  • Application Information

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Problems solved by technology

[0003] In view of this, the purpose of the embodiment of the present application is to provide an edge modulation transmitter and a digital isolator to improve the inability to perform targeted and different modes of modulation on the input signal according to the data rate of the input signal in the prior art , there is a problem that the accuracy of digital signal modulation is poor

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  • Edge modulation emitter and digital isolator
  • Edge modulation emitter and digital isolator
  • Edge modulation emitter and digital isolator

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Embodiment Construction

[0036] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0037] First, the digital isolator is introduced. The digital isolator is a chip that enables the electronic system to have high withstand voltage isolation characteristics when the digital signal and the analog signal are transmitted in the electronic system, so as to realize the isolation between the electronic systems. Common mode noise will have a great impact on the transmission reliability of the digital isolator signal, but the digital isolator of the prior art has a small range of anti-CMT interference, and cannot perform targeted edge modulation for input signals with different transmission rates. In some environments, the quality of signal transmission cannot be guaranteed, so this embodiment provides a digital isolator 10 to solve the above problems.

[0038] The input signal of the edge ...

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Abstract

The invention provides an edge modulation transmitter and a digital isolator, and relates to the technical field of digital circuits. An input signal of the edge modulation transmitter is a digital signal, and a rising edge and a falling edge appear alternately; the edge modulator emitter comprises a detection module; the edge modulator outputs a first number of pulses at a specified edge moment of the input signal when the detection module detects that a time interval between two adjacent edges of the input signal is less than a preset time length; and the edge modulator outputs a second number of pulses at the specified edge moment of the input signal when the detection module detects that the time interval between two adjacent edges of the input signal is greater than or equal to the preset duration, and the second number is greater than the first number. When the transmitter detects that common-mode noise occurs in a system, adaptive edge modulation is carried out based on the datarate of an input signal, and the accuracy of signal output is ensured.

Description

technical field [0001] The present application relates to the technical field of digital circuits, in particular to an edge modulation transmitter and a digital isolator. Background technique [0002] As digital isolators are mainly used to transmit digital signals between circuit modules with high voltage differences, there are more noise interference in their working environment, especially common mode noise (CMT, Common Mode Transient). For digital isolation posed a significant threat to the transmission reliability of the transmitter signal. The existing pulse-based edge coding and decoding technology can achieve a small range of anti-CMT interference, and cannot modulate the input signal in a targeted and different mode according to the data rate of the input signal, and there is a problem of poor digital signal modulation accuracy . Contents of the invention [0003] In view of this, the purpose of the embodiment of the present application is to provide an edge mod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/013H03K3/023H03K3/027H03K19/003
CPCH03K3/013H03K3/023H03K3/027H03K19/00315H03K19/00361
Inventor 李立松方向明伍荣翔
Owner 重庆线易电子科技有限责任公司
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