RF Remote Control

Abstract

The present invention discloses a radio frequency remote controller, including a control chip, a power supply circuit, a backlight driving circuit, a liquid crystal display screen, and a high-frequency transmitting circuit. The power supply circuit, the backlight driving circuit, the liquid crystal display screen, and the high-frequency transmitting circuit are electrically connected to the control chip respectively, and the high-frequency transmitting circuit transmits a carrier signal outward after frequency mixing, filtering, and high-frequency oscillation in sequence. The high-frequency transmitting circuit has undergone secondary filtering, which fundamentally realizes the function of passing the main frequency and filtering harmonics. The user can realize the setting of carriers such as 315M, 350M, and 433M by adjusting the acoustic wave filter Y1 and other filtering frequency selection parameters set in the high-frequency transmitting circuit, and the antenna network compensation is added in the high-frequency transmitting circuit, which can fundamentally solve the defect of insufficient length of the onboard antenna and realize the optimal radiation of the transmitted signal.

Description

Technical Field

[0001] This invention relates to the field of radio frequency communication, and more specifically to a radio frequency remote control. Background Art

[0002] Radio frequency communication is being used in more and more fields. In wireless communication transmitting devices, more and more users are adopting chip modules to simplify development, but the hardware cost has increased significantly. The price of a simple transmitting module is at least 3 RMB, which makes the unit price of even a simple handheld device very expensive. On the other hand, almost all of them are one-to-one, and the hardware circuits cannot be shared, resulting in poor compatibility. Traditional transmitting circuits face two problems for most designers: excessive harmonics prevent them from passing safety certification, and many specific devices are limited by appearance, so the transmitting antenna cannot be designed optimally, thus limiting the transmission distance. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a radio frequency remote control.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a radio frequency remote controller, comprising a control chip, a power supply circuit, a backlight driving circuit, a liquid crystal display screen, and a high-frequency transmitting circuit, wherein the power supply circuit, the backlight driving circuit, the liquid crystal display screen, and the high-frequency transmitting circuit are respectively electrically connected to the control chip, and the high-frequency transmitting circuit transmits a carrier signal to the outside through mixing, filtering, and high-frequency oscillation in sequence.

[0005] The further technical solution is as follows: the high-frequency transmitting circuit includes a mixer sub-circuit, a filter sub-circuit, and a high-frequency oscillation sub-circuit, which are connected in sequence.

[0006] The further technical solution is as follows: The mixer sub-circuit includes capacitor C11, resistors R8 and R15, inductor L1, resistor R13, transistor Q1, capacitor C8, capacitor C2, surface acoustic wave filter Y1, resistor R26, and capacitor C10. The first terminal of capacitor C11 is grounded, and the second terminal is connected to the first terminal of inductor L1. The first terminal of inductor L1 is connected to a 3.3V power input, and the second terminal is connected to the collector of transistor Q1. The first terminal of resistor R8 is connected to the MCU-DATA terminal of the control chip, and the second terminal is connected to the first terminal of resistor R15. The first terminal of resistor R13 is connected to the second terminal of resistor R8, and the second terminal is connected to transistor Q1. The base of the capacitor is connected; the first terminal of the capacitor C2 is connected to the first terminal of the resistor R13, and the second terminal is grounded; the first terminal of the surface acoustic wave filter Y1 is connected to the second terminal of the resistor R13, and the second terminal is connected to the second terminal of the capacitor C2; the first terminal of the resistor R26 is connected to the emitter of the transistor Q1, and the second terminal is grounded; the first terminal of the capacitor C8 is connected to the collector of the transistor Q1, and the second terminal is connected to the first terminal of the capacitor C10; the second terminal of the capacitor C10 is connected to the second terminal of the resistor R26; the filter sub-circuit includes a capacitor C12, an inductor L2, a resistor R20, an inductor L5, a transistor Q2, a resistor R16, and a capacitor C9; the capacitor C12... The first terminal of the inductor L2 is connected to the second terminal of the capacitor C11, and the second terminal is grounded. The first terminal of the inductor L2 is connected to the first terminal of the capacitor C12, and the second terminal is connected to the collector of the transistor Q2. The first terminal of the resistor R20 is connected to the first terminal of the resistor R26 and the first terminal of the capacitor C10, and the second terminal is connected to the base of the transistor Q2. The first terminal of the inductor L5 is connected to the base of the transistor Q2 and the second terminal of the resistor R15, and the second terminal is grounded. The first terminal of the resistor R16 is connected to the emitter of the transistor Q2, and the second terminal is grounded. The first terminal of the capacitor C9 is connected to the first terminal of the resistor R16, and the second terminal is connected to the collector of the transistor R16. The second terminal is connected; the high-frequency oscillator sub-circuit includes capacitor C17, capacitor C21, inductor L3, capacitor C23, capacitor C25 and an antenna. The first terminal of capacitor C17 is connected to the first terminal of capacitor C21 and the second terminal of inductor L3, and the second terminal is connected to the collector of transistor Q2 and the second terminal of inductor L2, respectively. The first terminal of capacitor C21 is connected to the second terminal of inductor L3 and the second terminal is grounded. The first terminal of inductor L3 is connected to the first terminal of capacitor C23 and the second terminal of capacitor C23 is grounded. The first terminal of capacitor C25 is connected to the antenna, and the second terminal is connected to the first terminal of inductor L3 and the first terminal of capacitor C23, respectively.

[0007] A further technical solution is as follows: a capacitor C16 is provided between the first end of the resistor R20 and the first end of the capacitor C10, and the capacitor C16 is used to filter the DC component of the carrier signal.

[0008] The further technical solution is as follows: the high-frequency oscillator sub-circuit includes an inductor L4, the first end of the inductor L4 is connected to the first end of the antenna and the first end of the capacitor C25 respectively, and the second end is grounded.

[0009] The further technical solution is as follows: the power supply circuit includes a voltage regulator sub-circuit and a detection sub-circuit.

[0010] The further technical solution is as follows: the voltage regulator sub-circuit includes a battery, capacitor C5, capacitor EC1, voltage regulator module U2, and capacitor C22. The first terminal of capacitor C5 is connected to the positive terminal and VBAT terminal of the battery, and the second terminal is connected to the negative terminal of the battery and grounded. The first terminal of capacitor EC1 is connected to the positive terminal of the battery, and the second terminal is connected to the negative terminal of the battery. The IN terminal of voltage regulator module U2 is connected to the positive terminal of the battery, and the ground terminal of voltage regulator module U2 is connected to the negative terminal of the battery. The first terminal of capacitor C22 is connected to the OUT terminal of voltage regulator module U2, and the second terminal is connected to the ground terminal of voltage regulator module U2. The OUT terminal of voltage regulator module U2 outputs a regulated voltage of 3.3V to the first terminal of inductor L1.

[0011] The further technical solution is as follows: the detection sub-circuit includes resistor R4, resistor R5 and resistor R5-1. The first end of resistor R4 is connected to the VBAT terminal and the second end is connected to the first end of resistor R5. The second end of resistor R5 is connected to the V-EN terminal of the control chip. The first end of resistor R5-1 is connected to the first end of resistor R5 and the second end is connected to the V-CHECK terminal of the control chip.

[0012] The further technical solution is as follows: the specific model of the control chip is MC96F7616AL.

[0013] The further technical solution is as follows: the specific model of both transistor Q1 and transistor Q2 is S2C3838Q.

[0014] The advantages of this invention compared to existing technologies are as follows: This invention provides a radio frequency remote control that uses a high-frequency transmitting circuit. This circuit sequentially transmits carrier signals through mixing, filtering, and high-frequency oscillation. The high-frequency transmitting circuit undergoes two-stage filtering, fundamentally achieving the function of transmitting the main frequency and filtering harmonics. Users can adjust the surface acoustic wave (SAW) filter Y1 and other filtering frequency selection parameters in the high-frequency transmitting circuit to set carrier frequencies such as 315MHz, 350MHz, and 433MHz. Furthermore, the high-frequency transmitting circuit incorporates antenna network compensation, fundamentally solving the problem of insufficient onboard antenna length and achieving optimal radiation of the transmitted signal.

[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0016] Figure 1 This is a circuit block diagram for an RF remote control.

[0017] Figure 2 This is a circuit diagram of a high-frequency transmission circuit.

[0018] Figure 3 This is the circuit diagram for the power supply circuit;

[0019] Figure 4 This is a circuit diagram of the backlight driving circuit.

[0020] Figure 5 The circuit diagram for the control chip;

[0021] Figure 6 This is a circuit diagram for an LCD screen.

[0022] Figure Labels

[0023] 1. Control chip; 2. Power supply circuit; 3. LCD screen; 4. Backlight driving circuit; 5. High-frequency transmission circuit. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0031] like Figures 1 to 6 As shown, a radio frequency remote control includes a control chip 1, a power supply circuit 2, a backlight driving circuit 4, an LCD screen 3, and a high-frequency transmitting circuit 5. The power supply circuit 2, the backlight driving circuit 4, the LCD screen 3, and the high-frequency transmitting circuit 5 are electrically connected to the control chip 1. The high-frequency transmitting circuit 5 transmits a carrier signal through mixing, filtering, and high-frequency oscillation in sequence. The high-frequency transmitting circuit 5 undergoes two-stage filtering, fundamentally achieving the function of transmitting the main frequency and filtering harmonics.

[0032] Specifically, the high-frequency transmitting circuit 5 includes a mixer sub-circuit, a filter sub-circuit, and a high-frequency oscillator sub-circuit, which are connected in sequence.

[0033] Specifically, if Figure 2As shown, the mixer sub-circuit includes capacitor C11, resistors R8 and R15, inductor L1, resistor R13, transistor Q1, capacitors C8 and C2, surface acoustic wave filter Y1, resistor R26, and capacitor C10. The first terminal of capacitor C11 is grounded, and the second terminal is connected to the first terminal of inductor L1. The first terminal of inductor L1 is connected to the 3.3V power input, and the second terminal is connected to the collector of transistor Q1. The first terminal of resistor R8 is connected to the MCU-DATA pin of control chip 1, and the second terminal is connected to the first terminal of resistor R15. The first terminal of resistor R13 is connected to the second terminal of resistor R8, and the second terminal is connected to the transistor... The base of Q1 is connected; the first terminal of capacitor C2 is connected to the first terminal of resistor R13, and the second terminal is grounded; the first terminal of surface acoustic wave filter Y1 is connected to the second terminal of resistor R13, and the second terminal is connected to the second terminal of capacitor C2; the first terminal of resistor R26 is connected to the emitter of transistor Q1, and the second terminal is grounded; the first terminal of capacitor C8 is connected to the collector of transistor Q1, and the second terminal is connected to the first terminal of capacitor C10; the second terminal of capacitor C10 is connected to the second terminal of resistor R26; the filter sub-circuit includes capacitor C12, inductor L2, resistor R20, inductor L5, transistor Q2, resistor R16, and capacitor C9. The first terminal of capacitor C12 is connected to the second terminal of capacitor C11, and the second terminal is grounded. The first terminal of inductor L2 is connected to the first terminal of capacitor C12, and the second terminal is connected to the collector of transistor Q2. The first terminal of resistor R20 is connected to the first terminal of resistor R26 and the first terminal of capacitor C10, and the second terminal is connected to the base of transistor Q2. The first terminal of inductor L5 is connected to the base of transistor Q2 and the second terminal of resistor R15, and the second terminal is grounded. The first terminal of resistor R16 is connected to the emitter of transistor Q2, and the second terminal is grounded. The first terminal of capacitor C9 is connected to the first terminal of resistor R16, and the second terminal is connected to the collector of transistor Q2. The second terminal is connected to the antenna. The high-frequency oscillator sub-circuit includes capacitor C17, capacitor C21, inductor L3, capacitor C23, capacitor C25, and an antenna. The first terminal of capacitor C17 is connected to the first terminal of capacitor C21 and the second terminal of inductor L3. The second terminal of capacitor C17 is connected to the collector of transistor Q2 and the second terminal of inductor L2. The first terminal of capacitor C21 is connected to the second terminal of inductor L3 and the second terminal is grounded. The first terminal of inductor L3 is connected to the first terminal of capacitor C23 and the second terminal of capacitor C23 is grounded. The first terminal of capacitor C25 is connected to the antenna, and the second terminal is connected to the first terminal of inductor L3 and the first terminal of capacitor C23.Control chip 1 transmits data using combinations of high and low pulses. Q1 is a high-frequency transistor, and Y1 is a surface acoustic wave (SAW) filter. When a pulse signal is present, transistor Q1 conducts, causing high-frequency oscillations in the SAW filter Y1, transistor Q1, capacitors C8 and C10. C11 is a filter capacitor. 3V3 passes through inductor L1, and transistor Q1 generates a signal with the same amplitude as the MCU-DATA signal at its emitter. Adjusting capacitors C8 and C10 adjusts the center frequency. The signal passes through a second-stage filter circuit composed of transistor Q2, capacitor C12, and inductor L2. The high-frequency carrier signal passes through capacitor C17 and is then radiated by the antenna. Capacitors C21 and C23, along with inductor L3, form a frequency-selective filter circuit to eliminate harmonics. C25, when used as a capacitor, further filters harmonics; when used as an inductor, it provides antenna compensation. This addition of antenna network compensation fundamentally solves the problem of insufficient onboard antenna length, achieving optimal signal radiation.

[0034] Specifically, changing resistors R13 and R15 can effectively change the transmission power. Changing the parameters of the surface acoustic wave (SAW) filter Y1 can change the center frequency of the carrier wave. The oscillation frequency of the SAW filter Y1 is the oscillation frequency of the system. By changing the parameters of the SAW filter Y1, users can directly modify it to 315M, 350M, or 433M. Modifying the parameters of the filter circuit can effectively perform filtering and frequency selection, ensuring consistent harmonic components even at high frequencies.

[0035] Specifically, if Figure 2 As shown, a capacitor C16 is provided between the first end of resistor R20 and the first end of capacitor C10. The carrier signal after mixing is filtered out by C16 to remove the pure DC component.

[0036] Specifically, if Figure 2 As shown, the high-frequency oscillator sub-circuit includes inductor L4. The first end of inductor L4 is connected to both the antenna and the first end of capacitor C25, while the second end is grounded. L4 serves as an antenna compensation component, working together to compensate for the wavelength mismatch of the onboard antenna and achieve optimal performance.

[0037] Specifically, the power supply circuit 2 includes a voltage regulator sub-circuit and a detection sub-circuit.

[0038] Specifically, if Figure 3As shown, the voltage regulator sub-circuit includes a battery, capacitor C5, capacitor EC1, voltage regulator module U2, and capacitor C22. The first terminal of capacitor C5 is connected to the positive terminal and VBAT terminal of the battery, and the second terminal is connected to the negative terminal of the battery and grounded. The first terminal of capacitor EC1 is connected to the positive terminal of the battery, and the second terminal is connected to the negative terminal. The IN terminal of voltage regulator module U2 is connected to the positive terminal of the battery, and the ground terminal of voltage regulator module U2 is connected to the negative terminal of the battery. The first terminal of capacitor C22 is connected to the OUT terminal of voltage regulator module U2, and the second terminal is connected to the ground terminal of voltage regulator module U2. The OUT terminal of voltage regulator module U2 outputs a regulated 3.3V voltage to the first terminal of inductor L1. The three batteries provide power, which, after being regulated by voltage regulator module U2, provides a stable 3V3V power supply to the system's logic circuit.

[0039] Specifically, if Figure 3 As shown, the detection sub-circuit includes resistors R4, R5, and R5-1. The first terminal of resistor R4 is connected to the VBAT terminal, and the second terminal is connected to the first terminal of resistor R5. The second terminal of resistor R5 is connected to the V-EN terminal of control chip 1. The first terminal of resistor R5-1 is connected to the first terminal of resistor R5, and the second terminal is connected to the V-CHECK terminal of control chip 1. Resistors R4, R5, and R5-1 form a low-voltage detection circuit. V-EN is connected to the MCU's I / O port as the enable port for low-voltage detection. V-CHECK is the analog-to-digital converter (ADC) detection port. When V-EN is low, battery voltage detection begins; after completion, V-EN is then set high, thus saving battery power.

[0040] Specifically, if Figure 4 As shown, in the backlight driving circuit 4, LED1 and LED2 provide a uniform light source for the three-color backlight LEDs through the light guide plate.

[0041] Specifically, if Figure 5 As shown, the four buttons ON, OFF, AUTO, and TIMER in control chip 1 implement power-on, power-off, automatic, and timer functions respectively according to software definition; Y12, capacitor C3, and capacitor C4 form a crystal oscillator circuit to provide a precise clock source for the system; NTC, capacitor C2, and resistor R6 form a temperature detection circuit, which calculates the real-time detected temperature through MCU AD sampling. NTC-EN is an enable signal; when temperature detection is needed, NTC-EN is set low, otherwise it is set high, which helps save battery power; SW1 is a DIP switch, which is a hardware code value circuit. When the MCU transmits a signal, it reads the hardware code value of SW1, and only devices with the same hardware code value at the receiving end will respond; resistors R11, R14, R17, and R18 form a voltage divider circuit to provide reference voltages for the MCU's built-in modules.

[0042] Specifically, the specific model of control chip 1 is MC96F7616AL.

[0043] Specifically, the specific model numbers of transistors Q1 and Q2 are both S2C3838Q.

[0044] Specifically, this RF remote controller uses a low-cost surface acoustic wave (SAW) filter as the main component. The high-frequency transmission circuit 5 based on discrete components undergoes two-stage filtering, fundamentally realizing the function of passing the main frequency and filtering harmonics. This circuit is a general-purpose RF transmission circuit. Users can directly adjust the SAW filter Y1 and other filtering frequency selection parameters to achieve carrier settings such as 315M, 350M, and 433M using the same hardware structure. Furthermore, the two-stage filtering circuit architecture adds antenna network compensation, which can fundamentally solve the defect of insufficient length of the onboard antenna and achieve optimal radiation of the transmitted signal.

[0045] Compared with existing technologies, this invention provides a radio frequency remote control that, through a high-frequency transmitting circuit, transmits carrier signals by sequentially performing mixing, filtering, and high-frequency oscillation. The high-frequency transmitting circuit undergoes two-stage filtering, fundamentally achieving the function of transmitting the main frequency and filtering harmonics. Users can adjust the surface acoustic wave (SAW) filter Y1 and other filtering frequency selection parameters in the high-frequency transmitting circuit to set carrier frequencies such as 315MHz, 350MHz, and 433MHz. Furthermore, the high-frequency transmitting circuit incorporates antenna network compensation, fundamentally solving the problem of insufficient onboard antenna length and achieving optimal signal radiation.

[0046] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A radio frequency remote controller, characterized in that: It includes a control chip, a power supply circuit, a backlight driving circuit, a liquid crystal display screen, and a high-frequency transmitting circuit. The power supply circuit, the backlight driving circuit, the liquid crystal display screen, and the high-frequency transmitting circuit are electrically connected to the control chip respectively. The high-frequency transmitting circuit transmits a carrier signal outward through mixing, filtering, and high-frequency oscillation in sequence; The high-frequency transmitting circuit comprises a mixing subcircuit, a filtering subcircuit and a high-frequency oscillating subcircuit, and the mixing subcircuit, the filtering subcircuit and the high-frequency oscillating subcircuit are connected in sequence; The mixing subcircuit includes a capacitor C11, a resistor R8, a resistor R15, an inductor L1, a resistor R13, a transistor Q1, a capacitor C8, a capacitor C2, a surface acoustic filter Y1, a resistor R26 and a capacitor C10. The first end of the capacitor C11 is grounded, and the second end is connected to the first end of the inductor L1. The first end of the inductor L1 is connected to a 3.3V power input, and the second end is connected to the collector of the transistor Q1. The first end of the resistor R8 is connected to the MCU-DATA end of the control chip, and the second end is connected to the first end of the resistor R15. The first end of the resistor R13 is connected to the second end of the resistor R8, and the second end is connected to the base of the transistor Q1. The first end of the capacitor C2 is connected to the first end of the resistor R13, and the second end is grounded. The first end of the acoustic filter Y1 is connected to the second end of the resistor R13, and the second end is connected to the second end of the capacitor C2. The first end of the resistor R26 is connected to the emitter of the transistor Q1, and the second end is grounded. The first end of the capacitor C8 is connected to the collector of the transistor Q1, and the second end is connected to the first end of the capacitor C10. The second end of the capacitor C10 is connected to the second end of the resistor R26. The filtering subcircuit includes a capacitor C12, an inductor L2, a resistor R20, an inductor L5, a transistor Q2, a resistor R16 and a capacitor C9. The first end of the capacitor C12 is connected to the emitter of the transistor Q1, and the second end is grounded. The second end of the capacitor C11 is connected, and the second end is grounded. The first end of the inductor L2 is connected to the first end of the capacitor C12, and the second end is connected to the collector of the transistor Q2. The first end of the resistor R20 is respectively connected to the first end of the resistor R26 and the first end of the capacitor C10, and the second end is connected to the base of the transistor Q2. The first end of the inductor L5 is respectively connected to the base of the transistor Q2 and the second end of the resistor R15, and the second end is grounded. The first end of the resistor R16 is connected to the emitter of the transistor Q2, and the second end is grounded. The first end of the capacitor C9 is connected to the first end of the resistor R16, and the second end is connected to the second end of the resistor R16. The high-frequency oscillator subcircuit comprises a capacitor C17, a capacitor C21, an inductor L3, a capacitor C23, a capacitor C25 and an antenna, a first end of the capacitor C17 is respectively connected to a first end of the capacitor C21 and a second end of the inductor L3, and a second end is respectively connected to a collector of the transistor Q2 and a second end of the inductor L2, a first end of the capacitor C21 is connected to a second end of the inductor L3, and a second end is grounded, a first end of the inductor L3 is connected to a first end of the capacitor C23, and a second end of the capacitor C23 is grounded, a first end of the capacitor C25 is connected to the antenna, and a second end is respectively connected to a first end of the inductor L3 and a first end of the capacitor C23; A capacitor C16 is provided between the first end of the resistor R20 and the first end of the capacitor C10, and the capacitor C16 is used to filter the DC component of the carrier signal; The high-frequency oscillator subcircuit includes an inductor L4, a first end of which is respectively connected to the antenna and a first end of the capacitor C25, and a second end of which is grounded.

2. The radio frequency remote controller according to claim 1, characterized in that: The power supply circuit includes a voltage stabilization subcircuit and a detection subcircuit.

3. The radio frequency remote controller according to claim 2, characterized in that: The voltage stabilizing subcircuit includes a battery, a capacitor C5, a capacitor EC1, a voltage stabilizing module U2 and a capacitor C22. The first end of the capacitor C5 is respectively connected to the positive electrode and the VBAT end of the battery, and the second end is connected to the negative electrode of the battery and grounded. The first end of the capacitor EC1 is connected to the positive electrode of the battery, and the second end is connected to the negative electrode of the battery. The IN end of the voltage stabilizing module U2 is connected to the positive electrode of the battery, and the ground end of the voltage stabilizing module U2 is connected to the negative electrode of the battery. The first end of the capacitor C22 is connected to the OUT end of the voltage stabilizing module U2, and the second end is connected to the ground end of the voltage stabilizing module U2. The OUT end of the voltage stabilizing module U2 outputs a regulated voltage of 3.3V to the first end of the inductor L1.

4. The radio frequency remote controller according to claim 3, characterized in that: The detection subcircuit includes a resistor R4, a resistor R5 and a resistor R5-1, a first end of the resistor R4 is connected to the VBAT end, a second end is connected to the first end of the resistor R5, a second end of the resistor R5 is connected to the V-EN end of the control chip, a first end of the resistor R5-1 is connected to the first end of the resistor R5, and a second end is connected to the V-CHECK end of the control chip.

5. The radio frequency remote controller according to claim 1, characterized in that: The specific model of the control chip is MC96F7616AL.

6. The radio frequency remote controller according to claim 1, characterized in that: The specific models of the transistor Q1 and the transistor Q2 are both S2C3838Q.

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