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Galvanic isolator circuit

A technology of electrical isolators and isolators, applied in circuits, inductors, circuit devices, etc., can solve problems such as inability to integrate chips, incompatibility of light-emitting diodes, LED light decay and heat loss, etc., to achieve amplification of differential mode signals, The effect of reducing signal distortion and reducing process cost

Inactive Publication Date: 2017-07-25
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If an optocoupler is used as an electrical isolator, it cannot be integrated into the chip because the process of the light-emitting diode (LED) is not compatible with the transistor process (for example, CMOS process), and the LED itself has problems such as light decay, heat loss, etc. need to be packaged separately
If a transformer or capacitor that can be integrated into the chip is used as an electrical isolator, it may be necessary to transmit high-frequency signals to achieve effective transmission efficiency, resulting in the need to design additional modulation and demodulation functions for circuits using this type of electrical isolator , in order to successfully transmit the signal

Method used

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Examples

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Embodiment Construction

[0042] figure 1 is a schematic diagram of a first embodiment of a circuit 100 using an electrical isolator 110 according to the present invention. The circuit 100 mainly includes an electrical isolator 110 , a first circuit 120 and a second circuit 130 . The power supply of the first circuit 120 is connected to the first voltage domain VD1, and the power supply of the second circuit 130 is connected to the second voltage domain VD2. In other words, the first circuit 120 belongs to the first voltage domain VD1, and the second circuit 130 belongs to the second voltage domain VD2. The circuit 100 may also include a load 140 . The load 140 is connected to the output terminal of the second circuit 130 .

[0043] In this embodiment, the first voltage domain VD1 and the second voltage domain VD2 may be different, so the electrical isolator 110 is needed to transmit signals and isolate the voltage domains. In this embodiment, the circuit 100 is applicable to a power circuit system...

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Abstract

An galvanic isolator circuit is provided. The galvanic isolator circuit includes a coil and a magnetic field (MF) sensor. The coil is coupled to a first circuit. The MF sensor is coupled to a second circuit, and disposed corresponding to the coil. The first circuit transfers a MF signal to the MF sensor via the coil. The MF sensor transforms the MF signal into an output signal and provides the output signal to the second circuit. Accordingly, the galvanic isolator circuit is capable of realizing functions for galvanic isolating by utilizing the coil and the MF sensor.

Description

technical field [0001] The present invention relates to an electrical isolator circuit. Background technique [0002] In the field of signal transmission, it is often necessary to transfer signals or energy from circuits in one voltage domain to circuits in another voltage domain, or to transfer signals or energy from one medium to another. However, due to the difference in voltage domain or medium type, the signal may interfere or break down the surrounding circuits through the parasitic path during the transmission process, resulting in damage. Therefore, for the sake of circuit reliability, electrical isolators, signal isolators, couplers or isolation barriers are usually used to transmit signals between circuits in different voltage domains to protect the circuits. [0003] Galvanic isolators can be used in many power circuit fields, such as power systems (such as power supplies, motor control systems, server power supply systems, home appliances, etc.), lighting contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175
CPCH03K19/017545H04B5/0031H04B5/0037H04B5/0075H02J50/10H01F38/14
Inventor 张元泰庄凯翔
Owner IND TECH RES INST
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