CN217087859U - Infrared amplification circuit, electronic equipment and infrared remote control system - Google Patents
Infrared amplification circuit, electronic equipment and infrared remote control system Download PDFInfo
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- CN217087859U CN217087859U CN202220695535.5U CN202220695535U CN217087859U CN 217087859 U CN217087859 U CN 217087859U CN 202220695535 U CN202220695535 U CN 202220695535U CN 217087859 U CN217087859 U CN 217087859U
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Abstract
The utility model discloses an infrared amplification circuit, this infrared amplification circuit includes: power input end, infrared receiving diode, signal amplification module and infrared coding and decoding chip, wherein, power input end respectively with infrared receiving diode signal amplification module with infrared coding and decoding chip electricity is connected, signal amplification module establishes ties infrared receiving diode with between the infrared coding and decoding chip, infrared receiving diode is used for with received infrared signal transmission extremely signal amplification module, signal amplification circuit is used for right infrared signal carries out the amplification and handles, and will amplify the back infrared signal transmission extremely infrared coding and decoding chip. The utility model discloses infrared amplifier circuit aims at utilizing infrared amplifier circuit to amplify terminal equipment received infrared signal to improve terminal equipment and receive infrared signal's ability. Furthermore, the utility model discloses still disclose an electronic equipment and infrared remote control system.
Description
Technical Field
The utility model relates to an infrared remote control technical field, in particular to infrared amplification circuit, electronic equipment and infrared remote control system.
Background
In today's intelligent electronic devices, infrared remote control has become a very basic function. In some infrared remote control scenes, one intelligent terminal device with an infrared function is used, so that key codes of a plurality of different infrared remote control devices can be intelligently learned, and different electronic devices can be controlled in a one-to-many mode.
The design of the present scheme is that a simple infrared coding and decoding chip and an infrared receiving and transmitting lamp circuit are used for realizing an infrared remote control function, but the design has the problem of short infrared receiving distance, so that when the remote controller is relatively far away from the terminal equipment or the infrared transmitting range of the remote controller is small, the terminal equipment is difficult to accurately analyze and obtain a corresponding infrared control instruction due to the fact that the received infrared signal is too weak, and the corresponding infrared control function is difficult to learn.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an infrared amplifier circuit, electronic equipment and infrared remote control system aims at utilizing infrared amplifier circuit to enlarge terminal equipment received infrared signal to improve terminal equipment and receive infrared signal's ability.
In order to achieve the above object, the utility model provides an infrared amplifying circuit, a serial communication port, include: power input end, infrared receiving diode, signal amplification module and infrared coding and decoding chip, wherein, power input end respectively with infrared receiving diode signal amplification module with infrared coding and decoding chip electricity is connected, signal amplification module establishes ties infrared receiving diode with between the infrared coding and decoding chip, infrared receiving diode is used for with received infrared signal transmission extremely signal amplification module, signal amplification circuit is used for right infrared signal carries out the amplification and handles, and will amplify the back infrared signal transmission extremely infrared coding and decoding chip.
Optionally, the signal amplification module at least includes a first triode and a first resistor connected to a collector of the first triode, a base of the first triode is electrically connected to the infrared receiving diode, and an emitter of the first triode is grounded.
Optionally, the signal amplification module further includes a first capacitor, wherein the first resistor is connected in series between the collector of the first triode and the power input terminal, and the first capacitor is connected in series between the collector of the first triode and the infrared receiving diode.
Optionally, the resistance of the first resistor is 120K Ω, and the capacitance of the first capacitor is 100 nF.
Optionally, the signal amplification module further includes a second resistor, a third resistor, a second capacitor, a second triode, a third triode, and a phase inverter, wherein the first resistor is connected in series between the collector of the first triode and the input terminal of the phase inverter, the second resistor is connected in series between the base of the first triode and the ground, the second capacitor is connected in series between the base of the first triode and the collector, the third resistor is connected in series between the base of the second triode and the power input terminal, the collector of the second triode is electrically connected to the power input terminal, the emitter of the second triode is electrically connected to the input terminal of the phase inverter, the base of the third triode is electrically connected to the collector of the first triode, the collector of the third triode is grounded, and the emitter of the third triode is electrically connected to the input terminal of the phase inverter, and the output end of the phase inverter is electrically connected with the infrared coding and decoding chip.
Optionally, the resistance of the first resistor is 220 Ω, the resistance of the second resistor is 120K Ω, the resistance of the third resistor is 1K Ω, and the capacitance of the second capacitor is 47 pF.
The utility model discloses further provide an electronic equipment, electronic equipment includes as above-mentioned infrared amplification circuit.
The utility model discloses further still provide an infrared remote control system, infrared remote control system includes infrared remote controller, and as above-mentioned electronic equipment.
The utility model discloses technical scheme's beneficial effect lies in: the infrared signal received by the terminal equipment is amplified by the infrared amplifying circuit so as to improve the capability of the terminal equipment for receiving the infrared signal, and the terminal equipment can still accurately analyze the received infrared signal into a corresponding control instruction even if the infrared remote controller sends the infrared signal to the terminal equipment with lower intensity.
Drawings
Fig. 1 is a schematic structural diagram of an infrared amplification circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a signal amplification module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a signal amplification module according to another embodiment of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
In the following, the embodiments of the present invention will be described in detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an infrared amplification circuit, refer to fig. 1, infrared amplification circuit includes: power input 10, infrared receiving diode 20, signal amplification module 30 and infrared coding and decoding chip 40, wherein, power input 10 respectively with infrared receiving diode 20 signal amplification module 30 with infrared coding and decoding chip 40 electricity is connected, signal amplification module 30 is established ties infrared receiving diode 20 with between the infrared coding and decoding chip 40, infrared receiving diode 20 is used for with received infrared signal transmission extremely signal amplification module 30, signal amplification circuit is used for right infrared signal carries out the amplification processing, and will amplify the back infrared signal transmission extremely infrared coding and decoding chip 40.
In this embodiment, after the power input terminal 10 is connected to a power supply, the power supply can supply power to the infrared receiving diode 20, the signal amplification module 30 and the infrared encoding and decoding chip 40.
Optionally, the infrared receiving diode 20 is also called an infrared photodiode, and is configured to receive an infrared signal sent by an external infrared remote control device. The cathode of the infrared receiving diode 20 is electrically connected to the power input terminal 10, and the anode of the infrared receiving diode 20 is electrically connected to the signal amplification module 30. When the infrared receiving diode 20 receives an infrared signal sent by an external infrared remote control device, the infrared signal is transmitted to the signal amplifying module 30.
Optionally, when receiving the infrared signal sent by the infrared receiving diode 20, the signal amplifying module 30 amplifies the infrared signal and transmits the amplified infrared signal to the infrared encoding and decoding chip 40. The signal amplification module 30 includes at least one triode, so that the signal amplification module 30 can amplify the infrared signal by using the signal amplification capability of the triode.
Therefore, the infrared signal received by the terminal equipment is amplified by the infrared amplifying circuit so as to improve the capability of the terminal equipment for receiving the infrared signal, and the terminal equipment can still accurately analyze the received infrared signal into a corresponding control instruction even if the infrared remote controller sends the infrared signal to the terminal equipment with lower intensity. Especially, when the terminal device needs to use the infrared learning function, the infrared signal received by the infrared receiving diode 20 is amplified by the signal amplifying module 30 and then input into the infrared encoding and decoding chip 40, thereby improving the infrared receiving distance and stability of the terminal device during infrared learning.
In an embodiment, based on the above embodiments, referring to fig. 2 to fig. 3, the signal amplification module 30 at least includes a first transistor Q1, and a first resistor R1 connected to a collector of the first transistor Q1, a base of the first transistor Q1 is electrically connected to the ir receiving diode 20, and an emitter of the first transistor Q1 is grounded.
The base of the first triode Q1 is electrically connected with the anode of the infrared receiving diode 20.
Optionally, the first triode Q1 is an NPN type triode, and the model of the first triode Q1 is 8050.
Optionally, the first triode Q1 and the first resistor R1 are used to form a cascode amplifying circuit in the signal amplifying module 30, so as to amplify the infrared signal received by the signal amplifying module 30.
In an embodiment, in addition to the above embodiment, referring to fig. 2, the signal amplification module 30 further includes a first capacitor C1, wherein the first resistor R1 is connected in series between the collector of the first transistor Q1 and the power input terminal 10, and the first capacitor C1 is connected in series between the collector of the first transistor Q1 and the infrared receiving diode 20.
In this embodiment, when the infrared receiving diode 20 receives a signal, the first transistor Q1 is turned on, the common-emitter amplifying circuit formed by the first transistor Q1 amplifies the infrared signal received by the infrared receiving diode 20, and then the infrared signal is decoded by ac coupling to the infrared codec chip 40 through the first capacitor C1, thereby implementing the infrared learning function.
Optionally, the signal amplification module 30 may change the voltage of the output infrared signal according to the difference of the current amplification factor H of the first transistor Q1. The first transistor Q1 can be operated in the amplification region by adjusting the resistance of the first resistor R1, and the voltage Vo of the infrared signal with amplification can be obtained by using the following formula:
vo (Vcc-H R1 Io), where Vcc is the power voltage provided by the power input terminal, and Io is the current conducted by the ir receiving diode 20.
Optionally, the value range of the first resistor R1 is 110K Ω to 130K Ω, and may be 120K Ω; the first capacitor C1 has a capacitance value in the range of 90nF to 110nF, optionally 100 nF.
Therefore, the infrared receiving distance of the terminal equipment can be increased by using simple and low-cost electronic components.
In an embodiment, based on the above embodiment, referring to fig. 3, the signal amplifying module 30 further includes a second resistor R2, a third resistor R3, a second capacitor C2, a second transistor Q2, a third transistor Q3 and an inverter F0, wherein the first resistor R1 is connected in series between a collector of the first transistor Q1 and an input terminal of the inverter F0, the second resistor R2 is connected in series between a base of the first transistor Q1 and a ground, the second capacitor C2 is connected in series between a base of the first transistor Q1 and a collector, the third resistor R3 is connected in series between a base of the second transistor Q2 and the power input terminal 10, a collector of the second transistor Q2 is electrically connected to the power input terminal 10, an emitter of the second transistor Q2 is electrically connected to the input terminal of the inverter F0, a base of the third transistor Q3 is electrically connected to a collector of the first transistor Q1, the collector of the third triode Q3 is grounded, the emitter of the third triode Q3 is electrically connected with the input end of the inverter F0, and the output end of the inverter F0 is electrically connected with the infrared codec chip 40.
In this embodiment, an inverter F0 is used to form a buffer stage circuit, the third resistor R3 and the second transistor Q2 form a constant current source load, a PNP emitter follower is formed by the third transistor Q3, the first resistor R1 is used as the collector load of the first transistor Q1, and the second capacitor C2 is used as feedback, so that the output signal of the buffer is not affected by the load of the output circuit, the stability of the voltage amplification stage circuit formed by the first transistor Q1 is improved, and the fluctuation caused by the output voltage load is reduced.
Therefore, a multi-stage triode amplifying circuit can be formed to realize a higher infrared receiving effect, and the stability of the circuit can be improved while multi-stage amplification of infrared signals is realized.
Optionally, the second triode Q2 is an NPN type triode, and the model of the second triode Q2 is 8050; the third triode Q3 is a PNP type triode, and the type can be selected as 8550.
Optionally, the value range of the first resistor R1 is 200 Ω to 250 Ω, and is optionally 220 Ω; the value range of the second resistor R2 is 110K omega-130K omega, and can be selected as 120K omega; the value range of the third resistor R3 is 0.9-1.1K omega, and 1K omega can be selected; the capacitance value of the second capacitor C2 is in the range of 40pF-50pF, and is optionally 47 pF.
The utility model discloses a further proposed electronic equipment includes infrared amplifier circuit, and this infrared amplifier circuit's concrete structure refers to above-mentioned embodiment, because this electronic equipment has adopted all technical scheme of above-mentioned all embodiments, consequently has all technical effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary detail here.
The utility model discloses further still provide an infrared remote control system, including infrared remote controller and infrared amplifier circuit, this infrared amplifier circuit's concrete structure refers to above-mentioned embodiment, because this electronic equipment has adopted all technical scheme of above-mentioned all embodiments, consequently has all technical effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary detail here.
What just go up be the utility model discloses a part or preferred embodiment, no matter be characters or the drawing can not consequently restrict the utility model discloses the scope of protection, all with the utility model discloses a holistic thought down, utilize the equivalent structure transform that the contents of the description and the drawing do, or direct/indirect application all includes in other relevant technical field the utility model discloses the within range of protection.
Claims (8)
1. An infrared amplification circuit, comprising: power input end, infrared receiving diode, signal amplification module and infrared coding and decoding chip, wherein, power input end respectively with infrared receiving diode signal amplification module with infrared coding and decoding chip electricity is connected, signal amplification module establishes ties infrared receiving diode with between the infrared coding and decoding chip, infrared receiving diode is used for with received infrared signal transmission extremely signal amplification module, signal amplification circuit is used for right infrared signal carries out the amplification and handles, and will amplify the back infrared signal transmission extremely infrared coding and decoding chip.
2. The infrared amplification circuit of claim 1, wherein the signal amplification module comprises at least a first transistor, and a first resistor connected to a collector of the first transistor, a base of the first transistor is electrically connected to the infrared receiving diode, and an emitter of the first transistor is grounded.
3. The infrared amplification circuit of claim 2, wherein the signal amplification module further comprises a first capacitor, wherein the first resistor is connected in series between the collector of the first transistor and the power input terminal, and wherein the first capacitor is connected in series between the collector of the first transistor and the infrared receiving diode.
4. The infrared amplifier circuit as set forth in claim 3, wherein said first resistor has a resistance of 120K Ω, and said first capacitor has a capacitance of 100 nF.
5. The infrared amplifier circuit according to claim 2, wherein the signal amplification module further comprises a second resistor, a third resistor, a second capacitor, a second triode, a third triode, and an inverter, wherein the first resistor is connected in series between a collector of the first triode and an input terminal of the inverter, the second resistor is connected in series between a base of the first triode and a ground line, the second capacitor is connected in series between a base and a collector of the first triode, the third resistor is connected in series between a base of the second triode and the power input terminal, the collector of the second triode is electrically connected to the power input terminal, the emitter of the second triode is electrically connected to the input terminal of the inverter, and the base of the third triode is electrically connected to the collector of the first triode, and the collector electrode of the third triode is grounded, the emitter electrode of the third triode is electrically connected with the input end of the phase inverter, and the output end of the phase inverter is electrically connected with the infrared coding and decoding chip.
6. The infrared amplification circuit of claim 5, wherein the first resistor has a resistance of 220 Ω, the second resistor has a resistance of 120K Ω, the third resistor has a resistance of 1K Ω, and the second capacitor has a capacitance of 47 pF.
7. An electronic device characterized by comprising the infrared amplification circuit according to any one of claims 1 to 6.
8. An infrared remote control system comprising an infrared remote control, and an electronic apparatus according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220695535.5U CN217087859U (en) | 2022-03-28 | 2022-03-28 | Infrared amplification circuit, electronic equipment and infrared remote control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220695535.5U CN217087859U (en) | 2022-03-28 | 2022-03-28 | Infrared amplification circuit, electronic equipment and infrared remote control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217087859U true CN217087859U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220695535.5U Active CN217087859U (en) | 2022-03-28 | 2022-03-28 | Infrared amplification circuit, electronic equipment and infrared remote control system |
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| Country | Link |
|---|---|
| CN (1) | CN217087859U (en) |
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2022
- 2022-03-28 CN CN202220695535.5U patent/CN217087859U/en active Active
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