CN209980457U - Infrared data receiving circuit - Google Patents
Infrared data receiving circuit Download PDFInfo
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- CN209980457U CN209980457U CN201920953267.0U CN201920953267U CN209980457U CN 209980457 U CN209980457 U CN 209980457U CN 201920953267 U CN201920953267 U CN 201920953267U CN 209980457 U CN209980457 U CN 209980457U
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Abstract
The utility model discloses an infrared data receiving circuit. The infrared data receiving circuit includes: the infrared receiving circuit comprises a first triode, a second triode, a blocking capacitor and an infrared receiving tube; the emitter of the first triode is connected with a voltage source, the base of the first triode is connected with the collector of the second triode, and the collector of the first triode is grounded; the collector of the second triode is connected with a voltage source, the base of the second triode is connected with one end of the blocking capacitor, and the emitter of the second triode is grounded; the base electrode of the second triode is also connected with a voltage source through a first resistor, and the base electrode of the second triode is also grounded through a second resistor; the other end of the blocking capacitor is connected with a collector electrode of the infrared receiving tube; the other end of the blocking capacitor is grounded through a third resistor; the emitting electrode of the infrared receiving tube is connected with a voltage source; the emitting electrode of the first triode is an infrared data output end. The utility model discloses an infrared data receiving circuit low power dissipation, and the reliability is high.
Description
Technical Field
The utility model relates to an infrared communication technical field especially relates to an infrared data receiving circuit.
Background
Infrared communication is a communication method for transmitting information by infrared rays, and can transmit information such as language, characters, data, and images. At present, infrared communication mainly has two modes, one mode is that infrared reception is not modulated, the infrared communication mode has short communication distance, an infrared receiving tube has leakage current, and the infrared receiving tube is easy to be interfered, and receives wrong data; the other is a special infrared modulation receiving chip, the communication distance is long, but the special infrared modulation receiving chip has large power consumption and is easily interfered by strong light, so that wrong data is received.
Disclosure of Invention
In view of the above, it is desirable to provide an infrared data receiving circuit that is low in power consumption and reliable.
In order to achieve the above object, the utility model provides a following scheme:
an infrared data receiving circuit comprising: the infrared receiving circuit comprises a first triode, a second triode, a blocking capacitor and an infrared receiving tube;
an emitting electrode of the first triode is connected with a voltage source, a base electrode of the first triode is connected with a collector electrode of the second triode, and the collector electrode of the first triode is grounded;
a collector of the second triode is connected with the voltage source, a base of the second triode is connected with one end of the blocking capacitor, and an emitter of the second triode is grounded; the base electrode of the second triode is also connected with the voltage source through a first resistor, and the base electrode of the second triode is also grounded through a second resistor; the other end of the blocking capacitor is connected with a collector electrode of the infrared receiving tube; the other end of the blocking capacitor is grounded through a third resistor; the emitting electrode of the infrared receiving tube is connected with the voltage source; and the emission electrode of the first triode is an infrared data output end.
Optionally, the emitter of the first triode is connected to a voltage source through a fourth resistor.
Optionally, the base of the first triode is connected to the collector of the second triode through a fifth resistor.
Optionally, the collector of the second triode is connected to the voltage source through a sixth resistor.
Optionally, the resistance range of the first resistor is 10M Ω to 15M Ω; the resistance range of the second resistor is 1.8M omega-1M omega; the resistance range of the third resistor is 2.4M omega-4.3M omega.
Optionally, the capacitance value range of the blocking capacitor is 0.47 μ F-2.2 μ F.
Optionally, the resistance range of the fourth resistor is 3K Ω to 10K Ω.
Optionally, the resistance range of the fifth resistor is 3K Ω to 10K Ω.
Optionally, the resistance range of the sixth resistor is 2M Ω -3M Ω.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an infrared data receiving circuit, include: the infrared receiving circuit comprises a first triode, a second triode, a blocking capacitor and an infrared receiving tube; the emitter of the first triode is connected with a voltage source, the base of the first triode is connected with the collector of the second triode, and the collector of the first triode is grounded; the collector of the second triode is connected with a voltage source, the base of the second triode is connected with one end of the blocking capacitor, and the emitter of the second triode is grounded; the base electrode of the second triode is also connected with a voltage source through a first resistor, and the base electrode of the second triode is also grounded through a second resistor; the other end of the blocking capacitor is connected with a collector electrode of the infrared receiving tube; the other end of the blocking capacitor is grounded through a third resistor; the emitting electrode of the infrared receiving tube is connected with a voltage source; the emitting electrode of the first triode is an infrared data output end. The utility model discloses an infrared data receiving circuit low power dissipation, and can receive infrared data at any time, do not receive the highlight interference, no receipt error code, the reliability is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an infrared data receiving circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic structural diagram of an infrared data receiving circuit according to an embodiment of the present invention.
Referring to fig. 1, an infrared data receiving circuit of an embodiment includes: the infrared receiving circuit comprises a first triode Q1, a second triode Q2, a blocking capacitor C1 and an infrared receiving tube D1; the emitter of the first triode Q1 is connected with a voltage source, the base of the first triode Q1 is connected with the collector of the second triode Q2, and the collector of the first triode Q1 is grounded; the collector of the second triode Q2 is connected with the voltage source, the base of the second triode Q2 is connected with one end of the blocking capacitor C1, and the emitter of the second triode Q2 is grounded; the base of the second triode Q2 is also connected with the voltage source through a first resistor R1, and the base of the second triode Q2 is also grounded through a second resistor R2; the other end of the DC blocking capacitor C1 is connected with the collector electrode of the infrared receiving tube D1; the other end of the DC blocking capacitor C1 is also grounded through a third resistor R3; the emitter of the infrared receiving tube D1 is connected with the voltage source; the emitting electrode of the first triode Q1 is an infrared data output terminal OUT.
In this embodiment, the resistance range of the first resistor R1 is 10M Ω -15M Ω, the resistance range of the second resistor R2 is 1.8M Ω -1M Ω, and the resistance range of the third resistor R3 is 2.4M Ω -4.3M Ω, so that the circuit has power consumption of only about 1 microampere without infrared communication, thereby greatly reducing power consumption.
In this embodiment, the capacitance value range of the blocking capacitor C1 is 0.47 μ F to 2.2 μ F, and the selection of the capacitance value of the blocking capacitor C1 can block the potential change at the point a caused by the slow change of infrared light from being transmitted to the point B, and when there is infrared light communication, since the capacitance voltage does not suddenly change, the potential change at the point a can be reflected to the point B, thereby completing data communication.
In an alternative embodiment, the emitter of the first transistor Q1 is connected to a voltage source through a fourth resistor R4; the base of the first triode Q1 is connected with the collector of the second triode Q2 through a fifth resistor R5; the collector of the second transistor Q2 is connected to the voltage source through a sixth resistor R6. The resistance range of the fourth resistor R4 is 3K omega-10K omega. The resistance range of the fifth resistor R5 is 3K omega-10K omega. The resistance range of the sixth resistor R6 is 2M omega-3M omega. The selection of the resistance value of the sixth resistor R6 can realize the primary signal amplification of the second triode Q2, and when infrared light interference or infrared data communication exists, only 1 microampere of power consumption can be generated on the primary signal amplification circuit, and the power consumption is low. The selection of the resistance values of the fourth resistor R4 and the fifth resistor R5 can realize the two-stage amplification of signals through the first triode Q1, and data communication is completed.
The operation principle of the infrared data receiving circuit in this embodiment is explained with reference to fig. 1: the emitter of the infrared receiving tube D1 is connected with a power supply VDD, and the potential of the point A is changed by utilizing the voltage change of the emitter and the collector caused by the infrared receiving tube D1 receiving infrared light; the change of the potential of the point A is transmitted to the point B through the DC blocking capacitor C1; when the potential change transmitted by the point A is not obtained at the point B, a stable potential is kept, and the potential is not enough to enable the second triode Q2 to be conducted; after the potential change of the point A is obtained at the point B, the potential change is amplified through the voltages of two electrodes of a second triode Q2, a fifth resistor R5 and a first triode Q1, and then infrared receiving is carried out to output low level. The detailed working principle is as follows:
in the absence of infrared light, the potential at the point a does not change, and therefore the potential at the point B does not change substantially. The voltage division obtained by the second resistor R2 and the first resistor R1 at point B does not make the second transistor Q2 conductive, so the potential at point C is equal to the voltage source VDD, and at this time, the first transistor Q1 is turned off, and the ir receiving output is high.
In the case of interfering infrared light, although the potential at the point a changes due to a short period of time or a slow change in infrared spectrum, the potential at the point a changes due to a short period of time or due to a slow change and cannot pass through the dc blocking capacitor C1, so that the potential at the point B remains unchanged, which is the same as the effect of no infrared light in the first case, i.e., no infrared communication.
When normal infrared light communication is available, the external infrared remote controller emits infrared light, the infrared receiving tube D1 is conducted, and the potential of the point A is increased. The potential at the point B rises because the capacitor voltage does not abruptly change. The potential at point B rises and the second transistor Q2 is turned on. The second triode Q2 is conducted, the potential of the point C is reduced, the first triode Q1 is conducted, and at the moment, the infrared receiving outputs low level, so that the communication effect is achieved.
The infrared data receiving circuit in this embodiment outputs a low level when infrared light is emitted; when no infrared light is emitted, high level is output, and the communication effect is achieved.
The infrared data receiving circuit in the embodiment has the following advantages:
1) the infrared receiving tube is not modulated, or the power consumption of the special infrared receiving tube is several milliamperes. Therefore, under the condition of realizing the infrared receiving function, the power consumption of the infrared receiving circuit of the embodiment is greatly reduced, and the power consumption of the special infrared receiving tube is thousands of times of the power consumption of the infrared data receiving circuit of the embodiment.
2) And (4) infrared interference resistance. The current special infrared receiving tube, ubiquitous meet strong sunlight or when the day light switch, can produce the interference output, lead to the unable problem of normal work of received signal equipment, the infrared receiving tube of this embodiment is not modulated, when receiving the infrared light of slow change, can transmit the potential change that arouses because the change of infrared light for signal equipment, has solved above-mentioned problem, and the reliability is high.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. An infrared data receiving circuit, comprising: the infrared receiving circuit comprises a first triode, a second triode, a blocking capacitor and an infrared receiving tube;
an emitting electrode of the first triode is connected with a voltage source, a base electrode of the first triode is connected with a collector electrode of the second triode, and the collector electrode of the first triode is grounded;
a collector of the second triode is connected with the voltage source, a base of the second triode is connected with one end of the blocking capacitor, and an emitter of the second triode is grounded; the base electrode of the second triode is also connected with the voltage source through a first resistor, and the base electrode of the second triode is also grounded through a second resistor; the other end of the blocking capacitor is connected with a collector electrode of the infrared receiving tube; the other end of the blocking capacitor is grounded through a third resistor; the emitting electrode of the infrared receiving tube is connected with the voltage source; and the emission electrode of the first triode is an infrared data output end.
2. The infrared data receiving circuit of claim 1, wherein the emitter of the first transistor is connected to a voltage source through a fourth resistor.
3. The infrared data receiving circuit of claim 1, wherein the base of the first transistor is connected to the collector of the second transistor through a fifth resistor.
4. The infrared data receiving circuit of claim 1, wherein the collector of the second transistor is connected to the voltage source through a sixth resistor.
5. The infrared data receiving circuit of claim 1, wherein the first resistor has a resistance value ranging from 10M Ω to 15M Ω; the resistance range of the second resistor is 1.8M omega-1M omega; the resistance range of the third resistor is 2.4M omega-4.3M omega.
6. The infrared data receiving circuit of claim 1, wherein the capacitance of the blocking capacitor is in the range of 0.47 μ F to 2.2 μ F.
7. The infrared data receiving circuit of claim 2, wherein the fourth resistor has a resistance value ranging from 3K Ω to 10K Ω.
8. An infrared data receiving circuit according to claim 3, wherein the resistance of the fifth resistor is in the range of 3K Ω -10K Ω.
9. The infrared data receiving circuit of claim 4, wherein the sixth resistor has a resistance value ranging from 2M Ω to 3M Ω.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920953267.0U CN209980457U (en) | 2019-06-24 | 2019-06-24 | Infrared data receiving circuit |
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| CN201920953267.0U CN209980457U (en) | 2019-06-24 | 2019-06-24 | Infrared data receiving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112133077A (en) * | 2019-06-24 | 2020-12-25 | 北京亚华意诺斯新能源科技有限公司 | Infrared data receiving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112133077A (en) * | 2019-06-24 | 2020-12-25 | 北京亚华意诺斯新能源科技有限公司 | Infrared data receiving circuit |
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Address after: 101407 room 103, building 1, yard 33, Yanqi Road, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Beijing Yahua IOT Technology Development Co.,Ltd. Address before: 100102 room 615, Zhongchen building, No.1, Lize Zhonger Road, Chaoyang District, Beijing Patentee before: BEIJING YAWAYINOSI NEW ENERGY TECHNOLOGY Co.,Ltd. |
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