Galvanic isolator circuit

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...

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

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