Novel linear isolation device

A linear isolation, a new type of technology, applied in the direction of measuring devices, voltage/current isolation, DC-coupled DC amplifiers, etc., can solve the problems of low bandwidth, bandwidth-limited analog-to-digital/digital-to-analog conversion circuit conversion rate, unfavorable practical applications, etc. Problems, to overcome distortion and high power consumption, good reliability and application prospects, to overcome the effect of incompatibility of process

Inactive Publication Date: 2022-03-11
茂睿芯(深圳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the signal isolation devices on the market are implemented by optocouplers. Optocouplers use the principle of photoelectric conversion to achieve signal isolation. They have the characteristics of good linearity and excellent isolation performance, but they also have low bandwidth and cannot be integrated with existing The disadvantage of circuit technology compatibility, so it is necessary to add the optocoupler to the circuit board in an independent package, which leads to a large area of ​​the circuit board, which is not conducive to practical application
[0003] In order to be compatible with integrated circuit technology, digital isolators are used as signal isolation devices, but digital isolators need to cooperate with analog-to-digital converters and digital-to-analog converters to achieve signal isolation. The advantage of this method of signal isolation and transmission is that it is easy to integrate. The disadvantages The structure is complex and the cost is high, the bandwidth is also limited by the conversion rate of the analog-to-digital / digital-to-analog conversion circuit, and there is a problem of distortion
Although digital isolators can also be implemented by means of magnetic isolation or capacitive isolation, the power consumption of these two methods is proportional to the rate of transmission signals. To achieve undistorted linear analog signal isolation transmission, a high The transmission rate and high power consumption are not conducive to practical applications.

Method used

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Effect test

Embodiment 1

[0030] Please refer to figure 1 , figure 2 and image 3 , a linear isolation device is disclosed in this embodiment, which mainly includes an isolation layer 11, a coil 12 and a Hall element 13, which will be described separately below.

[0031] The isolation layer 11 has a physical isolation function, and can isolate the coil 12 and the Hall element 13 in space to avoid electrical contact between the coil 12 and the Hall element 13 . It can be understood that since the isolation layer 11 also needs to transmit magnetic field signals, the isolation layer 11 should not have a magnetic shielding effect, so the isolation layer 11 can be made of materials such as plastic plates, insulating tapes, and PCB boards.

[0032]The coil 12 is arranged on one side of the isolation layer 11 , for example, glued to the side of the isolation layer 11 , or even arranged on the side of the PCB by etching. Here, the function of the coil 12 is to generate an electromagnetic field through the ...

Embodiment 2

[0050] On the basis of the linear isolation device disclosed in Embodiment 1, an improved linear isolation device is disclosed in this embodiment, which not only includes an isolation layer 11, a coil 12 and a Hall element 13, but also includes a voltage-to-current converter 21 and voltage amplifier 22, for details, please refer to Figure 6 ,because Figure 6 It is a schematic diagram of the signal transmission process, so the isolation layer 11 is not shown therein.

[0051] The voltage-to-current converter 21 is connected to the coil 12. The main function of the voltage-to-current converter 21 is to receive the input initial analog voltage signal, convert the initial analog voltage signal into an analog current signal acceptable to the coil 12, and output the analog current signal to coil 12.

[0052] The voltage amplifier 22 is connected to the Hall element 13, and the main function of the voltage amplifier 22 is to amplify the analog voltage signal output by the Hall el...

Embodiment 3

[0058] On the basis of the linear isolation device disclosed in Embodiment 1, an improved linear isolation device is disclosed in this embodiment, which not only includes an isolation layer 11, a coil 12 and a Hall element 13, but also includes a current pulse generating circuit 31 and differential comparator 32, for details, please refer to Figure 7 ,because Figure 7 It is a schematic diagram of the signal transmission process, so the isolation layer 11 is not shown therein.

[0059] Current pulse generation circuit 31 is connected with coil 12, and the main function of current pulse generation circuit 31 is to receive the initial digital signal of input, and convert initial digital signal into current pulse signal, and current pulse signal is the analog current signal that coil 12 can accept and is output to coil 12.

[0060] The differential comparator 32 is connected to the Hall element 13, and the main function of the differential comparator 32 is to perform different...

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Abstract

The invention relates to a novel linear isolation device which can be compatible with a semiconductor process and can facilitate integrated application. The linear isolation device mainly comprises an isolation layer, a coil and a Hall element. Wherein the coil is arranged on one side surface of the isolating layer, and the coil is used for generating an electromagnetic field penetrating through the isolating layer when an analog current signal is accessed; wherein the Hall element is arranged on the other side surface of the isolating layer, is opposite to the coil in position, and is used for measuring the field intensity of the electromagnetic field and generating an analog voltage signal. According to the technical scheme, a novel signal linear isolation mode is provided, and the isolation layer is arranged between the coil and the Hall element, so that the physical isolation effect of the two assemblies can be realized, and the linear isolation transmission requirement from an analog current signal to an analog voltage signal is met.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular to a novel linear isolation device compatible with existing semiconductor processes and capable of integrated applications. Background technique [0002] At present, most of the signal isolation devices on the market are implemented by optocouplers. Optocouplers use the principle of photoelectric conversion to achieve signal isolation. They have the characteristics of good linearity and excellent isolation performance, but they also have low bandwidth and cannot be integrated with existing Due to the disadvantage of circuit technology compatibility, it is necessary to add the optocoupler to the circuit board in an independent package, which leads to a large area of ​​the circuit board, which is not conducive to practical application. [0003] In order to be compatible with integrated circuit technology, digital isolators are used as signal isolation devices, bu...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01R15/20G01R33/07H03F3/45
CPCG01R15/202G01R33/07H03F3/45928
Inventor樊勃盛琳刘之炜侯婷
Owner茂睿芯(深圳)科技有限公司