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Infrared signal amplification circuit, processing circuit and infrared touch screen

An infrared signal and amplifying circuit technology, applied in the infrared field, can solve the problem that the infrared amplifying circuit cannot detect weak signals, and achieves the effect of strong anti-interference ability, suppression of common mode interference, and avoidance of pre-stage noise.

Pending Publication Date: 2019-05-21
GUANGZHOU HUAXIN ELECTRONICS TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide an infrared signal amplification circuit, a processing circuit and an infrared touch screen, which can effectively solve the problem that the infrared amplification circuit in the prior art cannot detect weak signals

Method used

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  • Infrared signal amplification circuit, processing circuit and infrared touch screen
  • Infrared signal amplification circuit, processing circuit and infrared touch screen
  • Infrared signal amplification circuit, processing circuit and infrared touch screen

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0035] see figure 2 An infrared signal amplifying circuit provided by an embodiment of the present invention includes: a photodiode REV1, a current amplifying circuit 2, a transimpedance amplifier 1 for amplifying the current output by the current amplifying circuit 2, and a first voltage source port V0 , the second voltage source port V1 and the detection signal output port Vout1.

[0036] The cathode of the photodiode REV1 is connected to the first voltage sour...

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Abstract

The invention discloses an infrared signal amplification circuit which comprises a photosensitive diode, an NPN type triode, a trans-impedance amplifier, a first voltage source port, a second voltagesource port and a detection signal output port, wherein the trans-impedance amplifier is used for converting current output by the NPN type triode into voltage and realizing voltage amplification; Thecathode of the photosensitive diode is connected with the first voltage source port; The anode of the photosensitive diode is connected with the base electrode of the NPN type triode, the collector electrode of the NPN type triode is connected with the second voltage source port, the emitter electrode of the NPN type triode is connected with the inverting input end of the trans-impedance amplifier, and the output end of the trans-impedance amplifier is connected with the detection signal output port. The invention also discloses an infrared signal processing circuit and an infrared touch screen. By adopting a plurality of embodiments, the problem that an infrared amplification circuit in the prior art cannot detect a weak signal is solved.

Description

technical field [0001] The invention relates to the field of infrared technology, in particular to an infrared signal amplification circuit, a processing circuit and an infrared touch screen. Background technique [0002] see figure 1 It is an amplifying circuit for infrared signals in the prior art. In the prior art, the infrared signal is only amplified by the triode, and the amplification factor of the triode to the infrared signal is generally relatively low, so that the infrared amplifying circuit cannot detect the weak infrared signal, thus Affect the use effect of infrared touch screen. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide an infrared signal amplifying circuit, a processing circuit and an infrared touch screen, which can effectively solve the problem that the infrared amplifying circuit cannot detect weak signals in the prior art. [0004] In order to achieve the above object, an embodiment of the...

Claims

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Application Information

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IPC IPC(8): H03F1/34G06F3/042
Inventor 谢旺薛琛
Owner GUANGZHOU HUAXIN ELECTRONICS TECH
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