Transmission device for capacitive coupling isolation transmission of pulse signals and corresponding transmission method

A technology of transmitting pulses and capacitive coupling, which is applied in the direction of logic circuit coupling device, output power conversion device, logic circuit connection/interface layout, etc.
CN114448419APending Publication Date: 2022-05-06杭州欧佩捷科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
杭州欧佩捷科技有限公司
Publication Date
2022-05-06

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Abstract

The invention discloses a transmission device for capacitive coupling isolation transmission of pulse signals. The transmission device comprises a transmitting side, an isolation region and a receiving side, the transmitting side comprises three CMOS (complementary metal oxide semiconductor) logic inverters U1, U2 and U3, the isolation region comprises small-capacitance high-voltage capacitors C1 and C2, and the receiving side comprises a bistable trigger which consists of a PMOS (P-channel metal oxide semiconductor) and an NMOS (N-channel metal oxide semiconductor) and has input and output at the same end, and two resistors Ru and Rd with the same resistance value; and the bistable flip-flop comprises a complementary metal oxide semiconductor (CMOS) logic phase inverter U5 and a CMOS logic phase inverter U4. The invention further discloses a transmission method for transmitting the pulse signals through capacitive coupling isolation by means of the transmission device. According to the invention, isolated transmission of pulse signals can be completed by a quite simple circuit.
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Description

technical field

[0001] The invention relates to a transmission device for capacitive coupling isolation transmission pulse signal and a corresponding transmission method. Background technique

[0002] In an isolated output power supply, it is necessary to transmit a pulse signal from the primary side of the power supply to the secondary side, or from the secondary side to the primary side. There are several ways to accomplish the transmission of pulse signals from the primary side of the power supply to the secondary side, or from the secondary side to the primary side. One is to use optocoupler; the other is to use a pulse transformer; the third is to use two small-capacity high-voltage capacitors to complete. Due to the limitation of the response speed of the optocoupler, fast pulses cannot be transmitted using the optocoupler. Using a pulse transformer and two small value high voltage capacitors can transmit fast pulses but not wide pulses. For the transmission of wide...

Claims

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