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Capacitance isolation type miniature solid state relay

A solid-state relay and capacitive isolation technology, applied in electronic switches, electrical components, pulse technology, etc., can solve the problems of large size, difficulty in integration and miniaturization design, and achieve the effect of simplifying the circuit, improving driving efficiency, and increasing the range

Pending Publication Date: 2022-05-13
G & A TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transformer-isolated solid-state relays have advantages in switching loads, but are bulky and difficult to integrate and miniaturize

Method used

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  • Capacitance isolation type miniature solid state relay
  • Capacitance isolation type miniature solid state relay
  • Capacitance isolation type miniature solid state relay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] see figure 2 , a capacitively isolated miniature solid state relay, is composed of a multivibrator circuit, an isolation capacitor, a rectifier circuit and an output FET circuit. The multivibrator circuit is composed of NOT gates U1~U2, resistors R1~R2, and capacitors C1~C2. The isolation capacitor is composed of capacitors C3-C4. The rectification circuit is a voltage doubler rectification circuit, which is composed of diodes D1-D2, capacitor C5 and voltage-stabilizing diode D3. The output field effect tube circuit is composed of resistor R3 and field effect tube Q1.

[0022] The positive and negative terminals of the power supply of the NOT gates U1 and U2 are respectively the positive and negative terminals of the solid state relay. The input terminal and output terminal of the NOT gate U1 are respectively connected to both ends of the resistor R1, the output terminal of the NOT gate U1 is connected to one terminal of the capacitor C1, and the other terminal of t...

Embodiment 2

[0027] see image 3 , a capacitively isolated miniature solid state relay, is composed of a multivibrator circuit, an isolation capacitor, a rectifier circuit and an output FET circuit. The multivibrator circuit is composed of NOT gates U1~U2, resistors R1~R2, and capacitors C1~C2. The isolation capacitor is composed of capacitors C3-C4. The rectification circuit is a half-wave rectification circuit, which is composed of diode D4, capacitor C6 and Zener diode D5. The output field effect tube circuit is composed of resistor R3 and field effect tube Q1.

[0028] The positive and negative terminals of the power supply of the NOT gates U1 and U2 are respectively the positive and negative terminals of the solid state relay. The input terminal and output terminal of the NOT gate U1 are respectively connected to both ends of the resistor R1, the output terminal of the NOT gate U1 is connected to one terminal of the capacitor C1, and the other terminal of the capacitor C1 is connec...

Embodiment 3

[0033] see Figure 4 , a capacitively isolated miniature solid state relay, is composed of a multivibrator circuit, an isolation capacitor, a rectifier circuit and an output FET circuit. The multivibrator circuit is composed of Schmitt trigger NOT gates U1A-U1B, resistor R1, and capacitor C1. The isolation capacitor is composed of capacitors C3-C4. The rectification circuit is a voltage doubler rectification circuit, which is composed of diodes D1-D2, capacitor C5 and voltage-stabilizing diode D3. The output field effect tube circuit is composed of resistor R3 and field effect tube Q1.

[0034]The positive and negative terminals of the power supply of the Schmitt trigger NOT gate U1A and the Schmitt trigger NOT gate U1B are respectively the positive and negative input terminals of the solid state relay. The input terminal of the Schmitt trigger NOT gate U1A is connected to the capacitor C1 and one end of the resistor R1; the other end of the capacitor C1 is grounded; the ot...

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PUM

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Abstract

The invention discloses a capacitance isolation type miniature solid state relay which is composed of a multivibrator circuit, an isolation capacitor, a rectifying circuit and an output field effect transistor circuit. The multivibrator circuit converts an input level control signal into a periodic oscillation signal, the periodic oscillation signal is coupled to the rectifier circuit through the isolation capacitor, and the rectifier circuit converts the periodic oscillation signal into a direct current signal and outputs the direct current signal between a grid electrode and a source electrode of a field-effect tube of the output field-effect tube circuit. And the drain electrode and the source electrode of the field effect transistor of the direct current signal driving output field effect transistor circuit are conducted. The device has the advantages of being small in size and suitable for high-density integration.

Description

technical field [0001] The invention relates to the technical field of solid state relays, in particular to a capacitively isolated miniature solid state relay. Background technique [0002] At present, the isolation methods of solid state relays are divided into photovoltaic isolation and transformer isolation. Photovoltaic isolation solid-state relays are small in size, but their control load is small, which is limited in many applications. Transformer-isolated solid-state relays have advantages in switching loads, but are bulky and difficult to integrate and miniaturize. With the development prospect of the integration and miniaturization of electronic devices, in order to reduce the volume of solid-state relays and improve the degree of integration, a new type of capacitive-isolated miniature solid-state relays is proposed. Contents of the invention [0003] The invention aims at the problems existing in the existing solid state relay, and provides a capacitive isola...

Claims

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Application Information

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IPC IPC(8): H03K17/687H02M7/10
CPCH03K17/687H02M7/10
Inventor 宁艳艳孙嘉隆郭竟海翔陈时荣
Owner G & A TECH
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