Photoconductive switch with hysteretic lockout
A technology of photoconductive switches and functions, applied in electronic switches, electrical components, pulse technology, etc., can solve problems such as failure to achieve energy saving, short time, and switch opening.
Active Publication Date: 2016-04-06
宜宾丰川动力科技有限公司
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Problems solved by technology
In some occasions, the photoconductive switch is used to control the electrical appliances. However, sometimes due to some special circumstances, the light is suddenly enhanced, but the time is very short, which also makes the switch open, failing to achieve the purpose of energy saving.
Method used
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[0016] Such as figure 1 The shown photoconductive switch with hysteresis locking function includes a photoconductive switch circuit and a feedback switch tube connected to the photoconductive switch circuit. The photoconductive switch circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a phototransistor and Amplifier; after the resistance R3 and the resistance R4 are connected in series, one non-common end is grounded, and the other non-common end is connected to the collector of the phototransistor; the two ends of the resistance R1 are respectively connected to the base and the collector of the phototransistor On the electrode, the collector of the phototransistor is connected to the power supply and the emitter is connected to the ground through the resistor R2. One input of the amplifier is connected to the emitter of the phototransistor, and the other input is connected to the resistor R3 and Between the resistor R4, the feedback switch tube is co...
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The invention discloses a photoconductive switch with a delay locking function. The photoconductive switch comprises a photoconductive switching circuit and a feedback switching tube, wherein the feedback switching tube is connected to the photoconductive switching circuit; the photoconductive switching circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a phototriode and an amplifier, wherein after the resistor R3 and the resistor R4 are connected in series, one common end is grounded, and the other common end is connected to a collecting electrode of the phototriode; both ends of the resistor R1 are respectively connected to a base electrode and the collecting electrode of the phototriode, the collecting electrode of the phototriode is connected with a power supply, and an emitting electrode of the phototriode is connected with the ground through the resistor R2; one input end of the amplifier is connected to the emitting electrode of the phototriode, and the other input end of the amplifier is connected between the resistor R3 and the resistor R4; the feedback switching tube is connected between the base electrode of the phototriode and an output end of the amplifier. The photoconductive switch has the advantages that the photoconductive switch has the delay locking function, the influence of lighting for a short time can be avoided, and the purpose of energy conservation can be achieved.
Description
technical field [0001] The invention relates to a photoconductive switch circuit, in particular to a photoconductive switch with hysteresis locking function. Background technique [0002] Photoconductive switch is a kind of semiconductor optoelectronic device that has developed rapidly in the past ten years. Its working principle is to use the photoelectric effect of the semiconductor material to modulate the resistivity of the material, that is, when the light is irradiated on the semiconductor material, the electrons in the valence band in the material absorb photon energy, jump into the conduction band through the forbidden band, and make the electron concentration in the conduction band and The number of holes in the valence band increases, that is, the photogenerated electron-hole pairs are excited, and the semiconductor material produces a photoelectric effect. Nowadays, more and more photoconductive switches are used, and more and more switching circuits are develope...
Claims
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IPC IPC(8): H03K17/94
Inventor 黄友华
Owner 宜宾丰川动力科技有限公司