CN117498945A - UART signal infrared receiving and transmitting circuit - Google Patents
UART signal infrared receiving and transmitting circuit Download PDFInfo
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- CN117498945A CN117498945A CN202311789386.4A CN202311789386A CN117498945A CN 117498945 A CN117498945 A CN 117498945A CN 202311789386 A CN202311789386 A CN 202311789386A CN 117498945 A CN117498945 A CN 117498945A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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Abstract
The invention relates to a UART signal infrared receiving and transmitting circuit, which comprises a current driving buffer circuit, an RX signal amplifying circuit, a UART serial port, an infrared transmitting circuit and an infrared receiving circuit; the current driving buffer circuit comprises a TX signal amplifying circuit and a push-pull circuit, wherein the UART serial port is provided with a TX pin and a RX pin, the TX pin is connected with the input end of the TX signal amplifying circuit, and the output end of the TX signal amplifying circuit is connected with an infrared transmitting circuit through the push-pull circuit; the infrared receiving circuit is connected with an RX pin through an RX signal amplifying circuit; the UART serial port has the advantages of greatly improving the speed and keeping the low cost of the UART serial port.
Description
Technical Field
The invention relates to the technical field of UART signal infrared receiving and transmitting circuits, in particular to a UART signal infrared receiving and transmitting circuit.
Background
UART (universal asynchronous receiver transmitter, namely, a serial port) is a very traditional and widely used interface in electronic products, and is generally used for the occasions of product development and debugging, production testing, after-sales diagnosis and maintenance and the like. Its advantages are simple process, convenient application, low cost and wide application. As long as the product has an MCU or an SoC integrated with a similar MCU in the circuit, the product defaults to have the UART serial port, so the cost of using the UART is low.
The UART serial port is provided with an RX data line and a TX data line, and the receiving and the sending of data are respectively realized. UARTs tend to be limited to wired data transmissions; the requirement for wireless transmission is usually solved by means of bluetooth, wiFi and the like, but the cost is high, and the wireless transmission by using infrared rays is a low-cost, safe and radio-frequency interference-free way.
The existing UART signal transmitting method through infrared rays in the market almost uses an infrared receiving and transmitting mode of a home remote controller, namely, a 38KHz carrier wave (the 38KHz is strictly a subcarrier relative to an infrared carrier wave) is added between an infrared receiving and transmitting tube and a baseband signal, and according to a communication theory, the highest speed limit value of the baseband is only 1/2 times of that of the 38KHz, so that the mode is limited to the low-speed application field.
In many cases, it is desirable to use the UART serial port in order to maintain the low cost advantage, and to transmit it wirelessly, and to meet a higher transmission rate, for example, 1Mbps or more. Therefore, a new application circuit needs to be developed to meet these needs.
Disclosure of Invention
The present invention is directed to the above-mentioned shortcomings of the prior art, and is mainly aimed at providing a UART signal infrared transceiver circuit, which greatly increases the rate and maintains the low cost advantage of the UART serial port.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the UART signal infrared receiving and transmitting circuit comprises a current driving buffer circuit, an RX signal amplifying circuit, a UART serial port, an infrared transmitting circuit and an infrared receiving circuit;
the current driving buffer circuit comprises a TX signal amplifying circuit and a push-pull circuit, wherein the UART serial port is provided with a TX pin and a RX pin, the TX pin is connected with the input end of the TX signal amplifying circuit, and the output end of the TX signal amplifying circuit is connected with an infrared transmitting circuit through the push-pull circuit;
the infrared receiving circuit is connected with an RX pin through an RX signal amplifying circuit.
As a preferable scheme, the TX signal amplifying circuit comprises a resistor R1 and a triode amplifying circuit, wherein the triode amplifying circuit is respectively connected with one end of the resistor R1 and the push-pull circuit, and the other end of the resistor R1 is connected with a TX pin.
As a preferred solution, the TX signal amplifying circuit further includes a capacitor C1, where the capacitor C1 is connected in parallel to two ends of the resistor R1.
As a preferable scheme, the triode amplifying circuit comprises a first NPN triode Q1, a resistor R2 and a resistor R3;
one end of the resistor R1 is connected with the base electrode of the first NPN triode Q1, the base electrode of the first NPN triode Q1 is grounded through the resistor R2, the emitter electrode of the first NPN triode Q1 is grounded, the collector electrode of the first NPN triode Q1 is connected with one end of the resistor R3, the other end of the resistor R3 is used for connecting the voltage VCC_TX and the push-pull circuit, and the collector electrode of the first NPN triode Q1 is also connected with the infrared emission circuit through the push-pull circuit.
As a preferable scheme, the triode amplifying circuit comprises a first PNP triode Q1', a resistor R2 and a resistor R3;
one end of the resistor R1 is connected with the base electrode of the first PNP triode Q1', the base electrode of the first PNP triode Q1' is connected with the emitter electrode of the first PNP triode Q1 'through the resistor R2, the emitter electrode of the first PNP triode Q1' is used for being connected with the voltage VCC_TX and the push-pull circuit, the collector electrode of the first PNP triode Q1 'is grounded through the resistor R3, and the collector electrode of the first PNP triode Q1' is also connected with the infrared emission circuit through the push-pull circuit.
As a preferable scheme, the push-pull circuit comprises a second NPN triode Q2 and a second PNP triode Q3;
the base of the second NPN triode Q2 and the base of the second PNP triode Q3 are commonly connected with the output end of the TX signal amplifying circuit, the collector of the second NPN triode Q2 is used for being connected with the voltage VCC_TX, the emitter of the second NPN triode Q2 and the emitter of the second PNP triode Q3 are commonly connected with the infrared emitting circuit, and the collector of the second PNP triode Q3 is grounded.
As a preferable scheme, the RX signal amplifying circuit comprises an inverting amplifying circuit and a front-stage amplifying circuit, wherein the infrared receiving circuit is connected with the input end of the front-stage amplifying circuit, the output end of the front-stage amplifying circuit is connected with the input end of the inverting amplifying circuit, and the output end of the inverting amplifying circuit is connected with an RX pin.
As a preferred solution, the pre-stage amplifying circuit includes an operational amplifier U1, a resistor R22 and a resistor R23 connected in series, where an anode input end of the operational amplifier U1 is connected to the infrared receiving circuit, a cathode input end of the operational amplifier U1 is connected to a series node of the resistor R22 and the resistor R23, a non-series node of the resistor R23 is grounded, a non-series node of the resistor R22 is connected to an output end of the operational amplifier U1, and an output end of the operational amplifier U1 is connected to an input end of the inverting amplifying circuit.
As a preferable scheme, the inverting amplifying circuit comprises an operational amplifier U2, a capacitor C21, a resistor R26, a resistor R27, a resistor R24 and a resistor R25;
the resistor R26 is connected in series with the resistor R27, the resistor R24 is connected in series with the resistor R25, the positive input end of the operational amplifier U2 is connected with a series node of the resistor R26 and the resistor R27, the series node of the resistor R26 and the resistor R27 is grounded through a capacitor C21, a non-series node of the resistor R26 is used for connecting a voltage VCC_RX, and a non-series node of the resistor R27 is grounded;
the negative input end of the operational amplifier U2 is connected with a series node of a resistor R24 and a resistor R25, a non-series node of the resistor R25 is connected with the output end of the front-stage amplifying circuit,
the non-series node of the resistor R24 is connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is connected with an RX pin.
As a preferable scheme, the device also comprises a shaping circuit, and the output end of the inverting amplification circuit is connected with an RX pin through the shaping circuit.
Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular: the infrared receiving circuit is mainly characterized in that a TX pin of a UART serial port is directly connected with an infrared transmitting circuit through a current driving buffer circuit, subcarrier and any carrier modulation are not needed in the middle, signals received by the infrared receiving circuit pass through an RX signal amplifying circuit and then are directly transmitted to an RX pin of the UART serial port, subcarrier and any modulation circuit are not needed in the middle, the speed is greatly improved, and the low cost advantage of the UART serial port is maintained.
In order to more clearly illustrate the structural features and efficacy of the present invention, a detailed description thereof will be given below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of a TX signal amplification circuit according to another embodiment of the present invention.
Reference numerals illustrate:
10. current drive buffer circuit 11, TX signal amplifying circuit
111. Triode amplifying circuit 111a and triode amplifying circuit
12. Push-pull circuit
21. Front stage amplifier circuit 22 and inverting amplifier circuit
23. Shaping circuit
31. Infrared transmitting circuit 32, infrared receiving circuit.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1 and 2, the UART signal infrared transceiver circuit does not need the infrared transceiver circuit of the traditional 38KHz subcarrier, and the high-speed UART signal infrared transceiver circuit is specially used for receiving and transmitting the high-speed UART baseband signal, and the transmission rate can be above 1 mbbs or even higher.
The UART signal infrared receiving and transmitting circuit comprises a current driving buffer circuit 10, an RX signal amplifying circuit, a UART serial port, an infrared transmitting circuit 31 and an infrared receiving circuit 32;
the current driving buffer circuit 10 comprises a TX signal amplifying circuit 11 and a push-pull circuit 12, the UART serial port is provided with a TX pin and an RX pin, the TX pin is connected with the input end of the TX signal amplifying circuit 11, and the output end of the TX signal amplifying circuit 11 is connected with an infrared transmitting circuit 31 through the push-pull circuit 12.
Preferably, the infrared emission circuit 31 includes an infrared emission tube D1, a resistor R4, an infrared emission tube D2, and a resistor R5; the anode of the infrared transmitting tube D1 and the anode of the infrared transmitting tube D2 are connected with the push-pull circuit 12 in common. The cathode of the infrared emission tube D1 is grounded through a resistor R4, and the cathode of the infrared emission tube D2 is grounded through a resistor R5. The TX pin is a signal transmitting pin of the UART serial port. The signal of the TX pin controls the on-off of the infrared transmitting tube D1 and the infrared transmitting tube D2 through the current driving buffer circuit 10.
In this embodiment, the TX signal amplifying circuit 11 includes a resistor R1, a capacitor C1, and a triode amplifying circuit 111, where the triode amplifying circuit 111 is connected to one end of the resistor R1 and the push-pull circuit, and the other end of the resistor R1 is connected to the TX pin. The capacitor C1 is connected in parallel with two ends of the resistor R1.
In this embodiment, the triode amplifying circuit 111 includes a first NPN triode Q1, a resistor R2 and a resistor R3;
one end of the resistor R1 is connected with the base electrode of the first NPN triode Q1, the base electrode of the first NPN triode Q1 is grounded through the resistor R2, the emitter electrode of the first NPN triode Q1 is grounded, the collector electrode of the first NPN triode Q1 is connected with one end of the resistor R3, the other end of the resistor R3 is used for connecting the voltage VCC_TX and the push-pull circuit, and the collector electrode of the first NPN triode Q1 is also connected with the infrared emission circuit through the push-pull circuit.
The push-pull circuit 12 comprises a second NPN triode Q2 and a second PNP triode Q3;
the base of the second NPN triode Q2 and the base of the second PNP triode Q3 are commonly connected with the output end of the TX signal amplifying circuit, the collector of the second NPN triode Q2 is used for being connected with the voltage VCC_TX, the emitter of the second NPN triode Q2 and the emitter of the second PNP triode Q3 are commonly connected with the infrared emitting circuit, and the collector of the second PNP triode Q3 is grounded.
The TX pin outputs high level when idle and also outputs high level when 1; only when 0 is output, it is low. The low level of the TX pin causes infrared transmitting tubes D1 and D2 to emit infrared light.
The second NPN triode Q2 and the second PNP triode Q3 form a push-pull circuit, and the push-pull circuit has the characteristics of high current and high response speed; in this embodiment, the push-pull circuit uses the first NPN transistor Q1 to simply amplify the input TX signal before; in order to accelerate the switching speed of the first NPN triode Q1, a capacitor C1 is connected in parallel to the resistor R1, which is based on the principle that the parasitic capacitance of the base and the emitter of the first NPN triode Q1 can be accelerated to charge and discharge when the TX signal is inverted.
In another embodiment, in the case that the high-level voltage output by the TX pin is not lower than the voltage vcc_tx, in order to make the quiescent current as small as possible, the first NPN transistor Q1 is changed to the first PNP transistor Q1, and the positions of the first NPN transistor Q1 and the resistor R3 are reversed, specifically:
the triode amplifying circuit 111a comprises a first PNP triode Q1', a resistor R2 and a resistor R3;
one end of the resistor R1 is connected with the base electrode of the first PNP triode Q1', the base electrode of the first PNP triode Q1' is connected with the emitter electrode of the first PNP triode Q1 'through the resistor R2, the emitter electrode of the first PNP triode Q1' is used for being connected with the voltage VCC_TX and the push-pull circuit, the collector electrode of the first PNP triode Q1 'is grounded through the resistor R3, and the collector electrode of the first PNP triode Q1' is also connected with the infrared emission circuit through the push-pull circuit.
The infrared receiving circuit 32 is connected to an RX pin through an RX signal amplifying circuit. In this embodiment, the infrared receiving circuit 32 includes an infrared receiving tube D21 and a resistor R21, wherein a cathode of the infrared receiving tube D21 is used for connecting to a voltage vcc_rx, an anode of the infrared receiving tube D21 is grounded through the resistor R21, and an anode of the infrared receiving tube D21 is further connected to an RX signal amplifying circuit. The infrared receiving tube D21 converts the received optical signal into a voltage signal through the resistor R21 and outputs the voltage signal to the signal amplifier.
The RX signal amplifying circuit comprises an inverting amplifying circuit 22, a pre-stage amplifying circuit 21 and a shaping circuit 23, wherein the infrared receiving circuit 32 is connected with the input end of the pre-stage amplifying circuit 21, the output end of the pre-stage amplifying circuit 21 is connected with the input end of the inverting amplifying circuit 22, and the output end of the inverting amplifying circuit 22 is connected with an RX pin.
The pre-stage amplifying circuit 21 comprises an operational amplifier U1, a resistor R22 and a resistor R23 which are connected in series, wherein the positive input end of the operational amplifier U1 is connected with the infrared receiving circuit 32, the negative input end of the operational amplifier U1 is connected with a series node of the resistor R22 and the resistor R23, a non-series node of the resistor R23 is grounded, the non-series node of the resistor R22 is connected with the output end of the operational amplifier U1, and the output end of the operational amplifier U1 is connected with the input end of the inverting amplifying circuit 22.
The amplification factor of the pre-amplification circuit 21 is: 1+R 22 / R 23 . According to the actual transmission distance and the signal strength, the pre-stage amplifying circuit can repeat a plurality of branches and be connected in series, and the natural number N is used for representing the number of the hierarchical cascade operational amplifier U1.
Then, the magnification is (1+R) 22 / R 23 ）*N。
The inverting amplifier circuit 22 comprises an operational amplifier U2, a capacitor C21, a resistor R26, a resistor R27, a resistor R24 and a resistor R25;
the resistor R26 is connected in series with the resistor R27, the resistor R24 is connected in series with the resistor R25, the positive input end of the operational amplifier U2 is connected with a series node of the resistor R26 and the resistor R27, the series node of the resistor R26 and the resistor R27 is grounded through a capacitor C21, a non-series node of the resistor R26 is used for connecting a voltage VCC_RX, and a non-series node of the resistor R27 is grounded;
the negative input end of the operational amplifier U2 is connected with a series node of a resistor R24 and a resistor R25, a non-series node of the resistor R25 is connected with the output end of the pre-stage amplifying circuit 21, a non-series node of the resistor R24 is connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is connected with an RX pin.
Wherein resistor R26, resistor R27 and capacitor C21 are used to form a comparative reference voltage V b I.e. V b =VCC RX *[R 27 /(R 26 +R 27 )]. Output voltage V out = V b +(R 24 +R 25 )*(V b -V in )。
The output end of the inverting amplifier circuit 22 is connected with an RX pin through a shaping circuit 23. Preferably, the shaping circuit 23 includes an operational amplifier U3, a resistor R28 and a resistor R29 connected in series, where an anode input end of the operational amplifier U3 is connected to an output end of the inverting amplifying circuit 22, a cathode input end of the operational amplifier U3 is connected to a series node of the resistor R28 and the resistor R29, a non-series node of the resistor R29 is grounded, a non-series node of the resistor R28 is connected to an output end of the operational amplifier U3, and an output end of the operational amplifier U3 is connected to an RX pin.
The shaping circuit 23 is the same principle as the pre-stage amplifying circuit 21, but the amplification factor of the shaping circuit 23 is large, so that it can shape the input signal into a waveform with a voltage of up to vcc_rx and a voltage of up to 0V, which is finally input to the RX pin. It should be noted that, if the inverting amplifier circuit 22 and the pre-stage amplifier circuit 21 already meet the waveform requirement of the RX reception of the UART serial port, the shaping circuit 23 may be omitted, so that the cost may be further reduced.
The invention is mainly characterized in that a TX pin of a UART serial port is directly connected with an infrared emission circuit through a current drive buffer circuit, a subcarrier and any carrier modulation are not needed in the middle, a signal received by the infrared receiving circuit passes through an RX signal amplifying circuit and then is directly connected with an RX pin of the UART serial port, a subcarrier and any modulation circuit are not needed in the middle, the speed is greatly improved, and the low cost advantage of the UART serial port is maintained.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.
Claims (10)
1. UART signal infrared receiving and transmitting circuit, its characterized in that: the device comprises a current driving buffer circuit, an RX signal amplifying circuit, a UART serial port, an infrared emission circuit and an infrared receiving circuit;
the current driving buffer circuit comprises a TX signal amplifying circuit and a push-pull circuit, wherein the UART serial port is provided with a TX pin and a RX pin, the TX pin is connected with the input end of the TX signal amplifying circuit, and the output end of the TX signal amplifying circuit is connected with an infrared transmitting circuit through the push-pull circuit;
the infrared receiving circuit is connected with an RX pin through an RX signal amplifying circuit.
2. The UART signal infrared transmitting and receiving circuit according to claim 1, wherein: the TX signal amplifying circuit comprises a resistor R1 and a triode amplifying circuit, wherein the triode amplifying circuit is respectively connected with one end of the resistor R1 and the push-pull circuit, and the other end of the resistor R1 is connected with a TX pin.
3. The UART signal infrared transmitting and receiving circuit according to claim 2, wherein: the TX signal amplifying circuit further comprises a capacitor C1, and the capacitor C1 is connected in parallel with two ends of the resistor R1.
4. The UART signal infrared transmitting and receiving circuit of claim 2, wherein: the triode amplifying circuit comprises a first NPN triode Q1, a resistor R2 and a resistor R3;
one end of the resistor R1 is connected with the base electrode of the first NPN triode Q1, the base electrode of the first NPN triode Q1 is grounded through the resistor R2, the emitter electrode of the first NPN triode Q1 is grounded, the collector electrode of the first NPN triode Q1 is connected with one end of the resistor R3, the other end of the resistor R3 is used for connecting the voltage VCC_TX and the push-pull circuit, and the collector electrode of the first NPN triode Q1 is also connected with the infrared emission circuit through the push-pull circuit.
5. The UART signal infrared transmitting and receiving circuit according to claim 2, wherein: the triode amplifying circuit comprises a first PNP triode Q1', a resistor R2 and a resistor R3;
one end of the resistor R1 is connected with the base electrode of the first PNP triode Q1', the base electrode of the first PNP triode Q1' is connected with the emitter electrode of the first PNP triode Q1 'through the resistor R2, the emitter electrode of the first PNP triode Q1' is used for being connected with the voltage VCC_TX and the push-pull circuit, the collector electrode of the first PNP triode Q1 'is grounded through the resistor R3, and the collector electrode of the first PNP triode Q1' is also connected with the infrared emission circuit through the push-pull circuit.
6. The UART signal infrared transmitting and receiving circuit according to claim 1, wherein: the push-pull circuit comprises a second NPN triode Q2 and a second PNP triode Q3;
the base of the second NPN triode Q2 and the base of the second PNP triode Q3 are commonly connected with the output end of the TX signal amplifying circuit, the collector of the second NPN triode Q2 is used for being connected with the voltage VCC_TX, the emitter of the second NPN triode Q2 and the emitter of the second PNP triode Q3 are commonly connected with the infrared emitting circuit, and the collector of the second PNP triode Q3 is grounded.
7. The UART signal infrared transmitting and receiving circuit according to claim 1, wherein: the RX signal amplifying circuit comprises an inverting amplifying circuit and a front-stage amplifying circuit, the infrared receiving circuit is connected with the input end of the front-stage amplifying circuit, the output end of the front-stage amplifying circuit is connected with the input end of the inverting amplifying circuit, and the output end of the inverting amplifying circuit is connected with an RX pin.
8. The UART signal infrared transmitting and receiving circuit according to claim 7, wherein: the front-stage amplifying circuit comprises an operational amplifier U1, a resistor R22 and a resistor R23 which are connected in series, wherein the positive input end of the operational amplifier U1 is connected with the infrared receiving circuit, the negative input end of the operational amplifier U1 is connected with a series node of the resistor R22 and the resistor R23, a non-series node of the resistor R23 is grounded, the non-series node of the resistor R22 is connected with the output end of the operational amplifier U1, and the output end of the operational amplifier U1 is connected with the input end of the inverting amplifying circuit.
9. The UART signal infrared transmitting and receiving circuit according to claim 7, wherein: the inverting amplification circuit comprises an operational amplifier U2, a capacitor C21, a resistor R26, a resistor R27, a resistor R24 and a resistor R25;
the resistor R26 is connected in series with the resistor R27, the resistor R24 is connected in series with the resistor R25, the positive input end of the operational amplifier U2 is connected with a series node of the resistor R26 and the resistor R27, the series node of the resistor R26 and the resistor R27 is grounded through a capacitor C21, a non-series node of the resistor R26 is used for connecting a voltage VCC_RX, and a non-series node of the resistor R27 is grounded;
the negative input end of the operational amplifier U2 is connected with a series node of a resistor R24 and a resistor R25, a non-series node of the resistor R25 is connected with the output end of the front-stage amplifying circuit,
the non-series node of the resistor R24 is connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is connected with an RX pin.
10. The UART signal infrared transmitting and receiving circuit according to claim 7, wherein: the anti-phase amplification circuit is characterized by further comprising a shaping circuit, wherein the output end of the anti-phase amplification circuit is connected with an RX pin through the shaping circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311789386.4A CN117498945A (en) | 2023-12-25 | 2023-12-25 | UART signal infrared receiving and transmitting circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311789386.4A CN117498945A (en) | 2023-12-25 | 2023-12-25 | UART signal infrared receiving and transmitting circuit |
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| CN117498945A true CN117498945A (en) | 2024-02-02 |
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| CN202311789386.4A Pending CN117498945A (en) | 2023-12-25 | 2023-12-25 | UART signal infrared receiving and transmitting circuit |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701531A (en) * | 2013-12-18 | 2014-04-02 | 深圳市新国都技术股份有限公司 | Infrared transmission circuit, infrared receiving circuit and infrared transceiver system |
| US20170004704A1 (en) * | 2013-07-02 | 2017-01-05 | Tianjia (Shanghai) Info Tech Co., Ltd. | Infrared emission and reception circuit and method of implementing the same |
| CN206117673U (en) * | 2016-11-04 | 2017-04-19 | 浙江水利水电学院 | Infrared receiver circuit |
| CN107517053A (en) * | 2017-07-07 | 2017-12-26 | 中兴软创科技股份有限公司 | A kind of half-duplex is anti-to disturb infrared serial interface circuit certainly |
| CN209659247U (en) * | 2019-03-11 | 2019-11-19 | 广州华欣电子科技有限公司 | A kind of infrared signal amplifying circuit, processing circuit and infrared touch panel |
| CN214704618U (en) * | 2021-04-26 | 2021-11-12 | 深圳市华沃表计科技有限公司 | Serial port communication multiplexing circuit |
| CN115762112A (en) * | 2022-09-06 | 2023-03-07 | 威胜集团有限公司 | High-speed infrared transceiver circuit |
| CN219602981U (en) * | 2023-03-01 | 2023-08-29 | 河北金博电梯智能设备有限公司 | Elevator floor detection device |
-
2023
- 2023-12-25 CN CN202311789386.4A patent/CN117498945A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170004704A1 (en) * | 2013-07-02 | 2017-01-05 | Tianjia (Shanghai) Info Tech Co., Ltd. | Infrared emission and reception circuit and method of implementing the same |
| CN103701531A (en) * | 2013-12-18 | 2014-04-02 | 深圳市新国都技术股份有限公司 | Infrared transmission circuit, infrared receiving circuit and infrared transceiver system |
| CN206117673U (en) * | 2016-11-04 | 2017-04-19 | 浙江水利水电学院 | Infrared receiver circuit |
| CN107517053A (en) * | 2017-07-07 | 2017-12-26 | 中兴软创科技股份有限公司 | A kind of half-duplex is anti-to disturb infrared serial interface circuit certainly |
| CN209659247U (en) * | 2019-03-11 | 2019-11-19 | 广州华欣电子科技有限公司 | A kind of infrared signal amplifying circuit, processing circuit and infrared touch panel |
| CN214704618U (en) * | 2021-04-26 | 2021-11-12 | 深圳市华沃表计科技有限公司 | Serial port communication multiplexing circuit |
| CN115762112A (en) * | 2022-09-06 | 2023-03-07 | 威胜集团有限公司 | High-speed infrared transceiver circuit |
| CN219602981U (en) * | 2023-03-01 | 2023-08-29 | 河北金博电梯智能设备有限公司 | Elevator floor detection device |
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