High-voltage millimeter wave digital isolator

Abstract

The utility model provides a high-voltage millimeter wave digital isolator, which is connected between a high-voltage digital signal side and a low-voltage side and comprises a voltage division circuit, a rectifying circuit and a millimeter wave isolator, the input end of the voltage division circuit is connected with the high-voltage digital signal side, and the output end of the voltage division circuit is connected with the input end of the rectifying circuit. The output end of the rectification circuit is connected with the transmitting end of the millimeter wave isolator, and the receiving end of the millimeter wave isolator is connected with the low-voltage side. The voltage division circuit divides the voltage of the high-voltage digital signal, outputs the high-voltage digital signal to the rectification circuit, rectifies the high-voltage digital signal and supplies power to the millimeter-wave isolator. The millimeter-wave isolator outputs a signal for low-voltage side driving. According to the high-voltage digital isolator based on millimeter wave isolation, a millimeter wave carrier antenna is small, and non-contact chip embedded antenna transmission isolation is safe and reliable. The integrated single-chip scheme is not provided with an external connector and a connecting line, so that the peripheral circuit is simple, the elements are fewer, the design is convenient, and a standard CMOS process and a standard packaging process can be used.

Description

TECHNICAL FIELD

[0001] The utility model relates to digital isolation technical field especially relates to a high pressure millimeter wave digital isolator. BACKGROUND

[0002] According to the different isolation medium, digital isolator can be divided into optical coupling isolator, magnetic coupling isolator and capacitor isolator. The optical coupling isolator is the most traditional isolator, and due to the low transmission rate, large volume and light decay, it has the shortcomings such as short service life. The magnetic coupling isolator cannot be realized by standard CMOS process, and it is difficult to avoid the EMI interference caused by the magnetic field, and it is difficult to manufacture a large capacity capacitor in integrated circuit, so the capacitor coupling is not convenient for integration.

[0003] In the prior art, the input signal Vin is usually a low-voltage logic signal of 0V to 5V, while in industrial applications, the input signal is usually a 24V high-voltage digital signal that meets the IEC 61131-2 standard. The signal has certain current capacity requirements. The input end of the existing architecture is in a low-voltage high-impedance state, and cannot be directly driven by a high-voltage digital signal. SUMMARY

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a high-voltage millimeter wave digital isolator with fast transmission speed, safe and reliable isolation, and easy integration, which processes high-voltage digital signals into signals that can drive low-voltage side and then outputs.

[0005] To achieve the above purpose, the utility model adopts the technical scheme that:

[0006] A high-voltage millimeter wave digital isolator is connected between the high-voltage digital signal side and the low-voltage side, including a voltage dividing circuit, a rectifier circuit and a millimeter wave isolator. The input end of the voltage dividing circuit is connected to the high-voltage digital signal side, the output end of the voltage dividing circuit is connected to the input end of the rectifier circuit, the output end of the rectifier circuit is connected to the transmitting end of the millimeter wave isolator, and the receiving end of the millimeter wave isolator is connected to the low-voltage side.

[0007] Optionally, the voltage dividing circuit includes a first resistor, a second resistor and a third resistor. The first end of the first resistor is connected to the positive pole of the high-voltage digital signal side, the second end of the first resistor is connected to the first end of the second resistor, the second end of the second resistor is connected to the first end of the third resistor, the second end of the third resistor is connected to the negative pole of the high-voltage digital signal side, the two input ends of the rectifier circuit are respectively connected to the first end and the second end of the second resistor, and the output end of the rectifier circuit is connected to the transmitting end of the millimeter wave isolator.

[0008] Optionally, the rectifier circuit comprises a first diode, a second diode, a third diode and a fourth diode, the anode of the first diode and the cathode of the second diode are connected to the first end of the second resistor, the anode of the third diode and the cathode of the fourth diode are connected to the second end of the second resistor, the cathode of the first diode and the cathode of the third diode are connected to the positive electrode of the transmitting end of the millimeter wave isolator, and the anode of the second diode and the anode of the fourth diode are connected to the negative electrode of the transmitting end of the millimeter wave isolator.

[0009] Optionally, the transmitting end of the millimeter wave isolator comprises a digital-to-analog converter, a first baseband amplifier, a first frequency mixer, a first phase-locked loop, a first power amplifier, a first filter and a millimeter wave transmitting antenna, the input end of the digital-to-analog converter is connected to the output end of the rectifier circuit, the output end of the digital-to-analog converter is connected to the input end of the first baseband amplifier, the output end of the first baseband amplifier is connected to the first input end of the first frequency mixer, the first phase-locked loop is connected to the second input end of the first frequency mixer, the output end of the first frequency mixer is connected to the input end of the first power amplifier, the output end of the first power amplifier is connected to the input end of the first filter, the output end of the first filter is connected to the millimeter wave transmitting antenna, and the receiving end of the millimeter wave isolator comprises a millimeter wave receiving antenna, a second filter, a second power amplifier, a second frequency mixer, a second phase-locked loop, a second baseband amplifier and an analog-to-digital converter, the millimeter wave transmitting antenna and the millimeter wave receiving antenna are connected through millimeter wave communication, the input end of the second filter is connected to the millimeter wave receiving antenna, the output end of the second filter is connected to the input end of the second power amplifier, the output end of the second power amplifier is connected to the first input end of the second frequency mixer, the second phase-locked loop is connected to the second input end of the second frequency mixer, the output end of the second frequency mixer is connected to the input end of the second baseband amplifier, the output end of the second baseband amplifier is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to the low-voltage side.

[0010] The high-voltage millimeter wave digital isolator has the advantages that:

[0011] The high-voltage millimeter wave digital isolator has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The high-voltage millimeter wave digital isolator has the advantages that:

[0013] Figure 2 The system structure schematic diagram of the millimeter wave isolator is shown.

[0014] Label explanation:

[0015] 1, voltage dividing circuit; 2, rectifier circuit; 3, millimeter wave isolator; 301, digital-to-analog converter; 302, first baseband amplifier; 303, first frequency mixer; 304, first phase-locked loop; 305, first power amplifier, 306, first filter; 307, millimeter wave transmitting antenna; 308, millimeter wave receiving antenna; 309, second filter; 310, second power amplifier; 311, second frequency mixer; 312, second phase-locked loop; 313, second baseband amplifier; 314, analog-to-digital converter. DETAILED DESCRIPTION

[0016] In order to more clearly understand the technical content, the purposes and effects of the present application, the following will be described in detail in conjunction with the specific embodiments and the accompanying drawings. It should be noted that the embodiments and the features in the embodiments can be combined with each other without conflict. In the following description, a lot of specific details are set forth in order to fully understand the present application, and the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0017] Please refer to Figure 1 and Figure 2 The technical scheme provided by the present application is:

[0018] A high-voltage millimeter wave digital isolator is connected between the high-voltage digital signal side and the low-voltage side, comprising a voltage dividing circuit 1, a rectifier circuit 2 and a millimeter wave isolator 3, the input end of the voltage dividing circuit 1 is connected to the high-voltage digital signal side, the output end of the voltage dividing circuit 1 is connected to the input end of the rectifier circuit 2, the output end of the rectifier circuit 2 is connected to the transmitting end of the millimeter wave isolator 3, and the receiving end of the millimeter wave isolator 3 is connected to the low-voltage side.

[0019] The utility model discloses a beneficial effect lies in: the voltage after voltage division is rectified by rectifier circuit and provides power supply for millimeter wave isolator, and the signal that millimeter wave isolator output can be used for low voltage side drive.

[0020] Optionally, the voltage dividing circuit 1 includes a first resistor R1, a second resistor R2 and a third resistor R3, the first end of the first resistor R1 is connected to the positive pole of the high voltage digital signal side, the second end of the first resistor R1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the negative pole of the high voltage digital signal side, the two input ends of the rectifier circuit 2 are respectively connected to the first end and the second end of the second resistor R2, and the output end of the rectifier circuit 2 is connected to the sending end of the millimeter wave isolator 3.

[0021] From the above description, it can be known that the voltage dividing circuit design can effectively divide the voltage whether the signal of the high voltage digital signal side is forward or reverse.

[0022] Optionally, the rectifier circuit 2 includes a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, the anode of the first diode D1 and the cathode of the second diode D2 are connected to the first end of the second resistor R2, the anode of the third diode D3 and the cathode of the fourth diode D4 are connected to the second end of the second resistor R2, the cathode of the first diode D1 and the cathode of the third diode D3 are connected to the positive pole of the sending end of the millimeter wave isolator 3, and the anode of the second diode D2 and the anode of the fourth diode D4 are connected to the negative pole of the sending end of the millimeter wave isolator 3.

[0023] From the above description, it can be known that the utility model adopts the rectifier circuit in the form of rectifier bridge to rectify the voltage after voltage division and then output to the millimeter wave isolator.

[0024] Optionally, the transmitting end of the millimeter wave isolator 3 comprises a digital-to-analog converter 301, a first baseband amplifier 302, a first frequency mixer 303, a first phase-locked loop 304, a first power amplifier 305, a first filter 306 and a millimeter wave transmitting antenna 307, the input end of the digital-to-analog converter 301 is connected to the output end of the rectifier circuit 2, the output end of the digital-to-analog converter 301 is connected to the input end of the first baseband amplifier 302, the output end of the first baseband amplifier 302 is connected to the first input end of the first frequency mixer 303, the second input end of the first frequency mixer 303 is connected to the first phase-locked loop 304, the output end of the first frequency mixer 303 is connected to the input end of the first power amplifier 305, the output end of the first power amplifier 305 is connected to the input end of the first filter 306, the output end of the first filter 306 is connected to the millimeter wave transmitting antenna 307, the receiving end of the millimeter wave isolator 3 comprises a millimeter wave receiving antenna 308, a second filter 309, a second power amplifier 310, a second frequency mixer 311, a second phase-locked loop 312, a second baseband amplifier 313 and an analog-to-digital converter 314, the millimeter wave transmitting antenna 307 and the millimeter wave receiving antenna 308 are connected through millimeter wave communication, the input end of the second filter 309 is connected to the millimeter wave receiving antenna 308, the output end of the second filter 309 is connected to the input end of the second power amplifier 310, the output end of the second power amplifier 310 is connected to the first input end of the second frequency mixer 311, the second input end of the second frequency mixer 311 is connected to the second phase-locked loop 312, the output end of the second frequency mixer 311 is connected to the input end of the second baseband amplifier 313, the output end of the second baseband amplifier 313 is connected to the input end of the analog-to-digital converter 314, and the output end of the analog-to-digital converter 314 is connected to the low-voltage side.

[0025] From the above description, it can be known that the signal reaches the millimeter wave transmitting end, is firstly converted from digital to analog through the digital-to-analog converter, is then amplified through the first baseband amplifier, is then subjected to frequency mixing and phase locking, is then power-amplified through the first power amplifier, is then filtered through the first filter, and is finally transmitted through the millimeter wave transmitting antenna; the millimeter wave receiving antenna receives the signal transmitted from the millimeter wave transmitting antenna, is firstly filtered through the second filter, is then power-amplified through the second power amplifier, is then subjected to frequency mixing and phase locking, is then amplified through the second baseband amplifier, is then converted from analog to digital through the analog-to-digital converter, and is finally output as a digital signal to the low-voltage side.

[0026] Please refer to Figure 1 and Figure 2 , the embodiment one of the utility model is:

[0027] A high-voltage millimeter wave digital isolator, like Figure 1As shown, connected between the high-voltage digital signal side and the low-voltage side, the voltage dividing circuit 1, the rectifier circuit 2 and the millimeter wave isolator 3, the voltage dividing circuit 1 is connected with the 24V high-voltage digital signal, and the output end VOUT of the millimeter wave isolator 3 is connected with the low-voltage side (not shown in the figure).

[0028] The voltage dividing circuit 1 comprises a first resistor R1, a second resistor R2 and a third resistor R3, the first end of the first resistor R1 is connected with the positive pole of the high-voltage digital signal side, the second end of the first resistor R1 is connected with the first end of the second resistor R2, the second end of the second resistor R2 is connected with the first end of the third resistor R3, and the second end of the third resistor R3 is connected with the negative pole of the high-voltage digital signal side.

[0029] The rectifier circuit 2 comprises a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, the anode of the first diode D1 and the cathode of the second diode D2 are connected with the first end of the second resistor R2, the anode of the third diode D3 and the cathode of the fourth diode D4 are connected with the second end of the second resistor R2, the cathode of the first diode D1 and the cathode of the third diode D3 are combined to form a positive pole output end, and the anode of the second diode D2 and the anode of the fourth diode D4 are combined to form a negative pole output end.

[0030] The millimeter wave isolator 3 includes a transmitting end and a receiving end, the transmitting end includes a digital-to-analog converter 301, a first baseband amplifier 302, a first mixer 303, a first phase-locked loop 304, a first power amplifier 305, a first filter 306 and a millimeter wave transmitting antenna 307, the digital-to-analog converter 301, the first baseband amplifier 302, the first mixer 303, the first phase-locked loop 304, the first power amplifier 305 and the first filter 306 form a transmitting circuit TX, the positive input end of the digital-to-analog converter 301 is connected with the positive output end of the rectifier circuit 2, the negative input end of the digital-to-analog converter 301 is connected with the negative output end of the rectifier circuit 2, the output end of the digital-to-analog converter 301 is connected with the input end of the first baseband amplifier 302, the output end of the first baseband amplifier 302 is connected with the first input end of the first mixer 303, the first phase-locked loop 304 is connected with the second input end of the first mixer 303, the output end of the first mixer 303 is connected with the input end of the first power amplifier 305, the output end of the first power amplifier 305 is connected with the input end of the first filter 306, the output end of the first filter 306 is connected with the millimeter wave transmitting antenna 307, the receiving end includes a millimeter wave receiving antenna 308, a second filter 309, a second power amplifier 310, a second mixer 311, a second phase-locked loop 312, a second baseband amplifier 313 and an analog-to-digital converter 314, the second filter 309, the second power amplifier 310, the second mixer 311, the second phase-locked loop 312, the second baseband amplifier 313 and the analog-to-digital converter 314 form a receiving circuit RX, the millimeter wave transmitting antenna 307 and the millimeter wave receiving antenna 308 are connected through millimeter wave communication, the input end of the second filter 309 is connected with the millimeter wave receiving antenna 308, the output end of the second filter 309 is connected with the input end of the second power amplifier 310, the output end of the second power amplifier 310 is connected with the first input end of the second mixer 311, the second phase-locked loop 312 is connected with the second input end of the second mixer 311, the output end of the second mixer 311 is connected with the input end of the second baseband amplifier 313, the output end of the second baseband amplifier 313 is connected with the input end of the analog-to-digital converter 314, and the output end of the analog-to-digital converter 314 is connected with the low-voltage side. As shown in the figure. Wherein, the transmitting end can be regarded as a modulator, and the receiving end can be regarded as a demodulator. The modulator performs OOK modulation on the input signal, and transmits a high-frequency carrier when the input is high, and does not transmit a signal when the input is low; the millimeter wave transmission between the millimeter wave transmitting antenna 307 and the millimeter wave receiving antenna 308 realizes isolation; the demodulator restores the high-frequency carrier to high level, and the low level remains unchanged. Figure 2

[0031] ​In conclusion, the high-voltage millimeter wave digital isolator can convert high-voltage digital signals in industrial applications into signals that can drive low-voltage side and then output.

[0032] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, so any modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model, without departing from the technical scheme content of the utility model, still belongs to the range of the technical scheme of the utility model.

Claims

1. A high voltage millimeter wave digital isolator coupled between a high voltage digital signal side and a low voltage side, characterized by, The application relates to a high-voltage digital signal transmission device, which comprises a voltage dividing circuit, a rectifier circuit and a millimeter wave isolator.

2. The high power millimeter wave digital isolator of claim 1, wherein, The voltage dividing circuit comprises a first resistor, a second resistor and a third resistor, the first end of the first resistor is connected with the positive pole of the high-voltage digital signal side, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the third resistor, the second end of the third resistor is connected with the negative pole of the high-voltage digital signal side, the first end and the second end of the second resistor are respectively connected with the two input ends of the rectifier circuit, and the output end of the rectifier circuit is connected with the transmitting end of the millimeter wave isolator.

3. The high power millimeter wave digital isolator of claim 2, wherein, The rectifier circuit comprises a first diode, a second diode, a third diode and a fourth diode, the anode of the first diode and the cathode of the second diode are connected with the first end of the second resistor, the anode of the third diode and the cathode of the fourth diode are connected with the second end of the second resistor, the cathode of the first diode and the cathode of the third diode are connected with the positive pole of the transmitting end of the millimeter wave isolator, and the anode of the second diode and the anode of the fourth diode are connected with the negative pole of the transmitting end of the millimeter wave isolator.

4. The high power millimeter wave digital isolator of claim 1, wherein, The transmitting end of the millimeter wave isolator comprises a digital-to-analog converter, a first baseband amplifier, a first frequency mixer, a first phase-locked loop, a first power amplifier, a first filter and a millimeter wave transmitting antenna, the input end of the digital-to-analog converter is connected with the output end of the rectifier circuit, the output end of the digital-to-analog converter is connected with the input end of the first baseband amplifier, the output end of the first baseband amplifier is connected with the first input end of the first frequency mixer, the first phase-locked loop is connected with the second input end of the first frequency mixer, the output end of the first frequency mixer is connected with the input end of the first power amplifier, the output end of the first power amplifier is connected with the input end of the first filter, the output end of the first filter is connected with the millimeter wave transmitting antenna, the receiving end of the millimeter wave isolator comprises a millimeter wave receiving antenna, a second filter, a second power amplifier, a second frequency mixer, a second phase-locked loop, a second baseband amplifier and an analog-to-digital converter, the millimeter wave transmitting antenna and the millimeter wave receiving antenna are connected through millimeter wave communication, the input end of the second filter is connected with the millimeter wave receiving antenna, the output end of the second filter is connected with the input end of the second power amplifier, the output end of the second power amplifier is connected with the first input end of the second frequency mixer, the second phase-locked loop is connected with the second input end of the second frequency mixer, the output end of the second frequency mixer is connected with the input end of the second baseband amplifier, the output end of the second baseband amplifier is connected with the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected with the low-voltage side.

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