CN211604293U - High-power transmitting circuit of remote controller - Google Patents

Abstract

The utility model discloses a high-power transmitting circuit of a remote controller, which comprises a remote control key, a coding chip, a high-frequency transmitting chip, a sound surface high-frequency resonator, an oscillating circuit, a power amplifying circuit and an antenna; the signal input end of the high-frequency transmitting chip is connected with the output end of the sound surface high-frequency resonator and the output end of the coding chip, the signal output end circuit of the high-frequency transmitting chip is connected with the power amplifying circuit, and the high-frequency transmitting chip modulates the coding signal input by the coding chip and the high-frequency signal input by the sound surface high-frequency resonator and amplifies the power for the first time; the input end of the power amplifying circuit is connected with the signal output end of the high-frequency transmitting chip, the output end of the power amplifying circuit is connected with the antenna, and the modulated signal input by the high-frequency transmitting chip is subjected to secondary power amplification by the power amplifying circuit and then transmitted through the antenna. The utility model discloses make the transmitting power of remote controller big, can carry out remote control to satisfy the remote control demand in fields such as intelligent house.

Description

A high-power transmitting circuit of a long-distance remote control

technical field

The utility model relates to the technical field of wireless remote control, in particular to a high-power transmitting circuit of a long-distance remote control.

Background technique

The remote control uses wireless transmission technology to control electronic devices within a certain distance to perform corresponding actions, such as in the field of smart home, such as doorbell remote control, light switch remote control, garage door remote control, etc.

In the prior art, the remote control signal transmitted by the remote control generally adopts primary power amplification, and its transmission power is low, which is not suitable for long-distance remote control.

Therefore, the existing technology needs to be developed.

Utility model content

In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a high-power transmitting circuit of a long-distance remote control, which aims to make the transmitting power of the remote control large and enable long-distance remote control.

In order to achieve the above object, the utility model provides the following technical solutions:

A high-power high-frequency transmitting circuit for a remote remote control, which includes a remote control button, a coding chip, a high-frequency transmitting chip, an acoustic surface high-frequency resonator, an oscillation circuit, a power amplifying circuit and an antenna;

The input end of the encoding chip is connected to the remote control button, and the output end of the encoding chip is connected to the high-frequency transmitting chip, and the encoding chip encodes the key signal of the remote control button and outputs the encoded signal to the high-frequency transmitting chip;

The high-frequency transmitting chip is provided with a signal input terminal, an oscillation input terminal and a signal output terminal. The signal input terminal of the high-frequency transmitting chip is connected to the output terminal of the acoustic surface high-frequency resonator and the output terminal of the coding chip. The terminal is connected to the power amplifying circuit, and the high-frequency transmitting chip modulates and amplifies the first power of the high-frequency signal input by the encoding chip and the high-frequency signal input by the high-frequency resonator of the acoustic surface;

The oscillating circuit is connected to the input end of the acoustic surface high-frequency resonator and the oscillating input end of the high-frequency transmitting chip;

The input end of the power amplifying circuit is connected to the signal output end of the high-frequency transmitting chip, and the output end is connected to the antenna.

Wherein, the model of the high-frequency transmitting chip U1 is TDH9950, which is provided with an input pin DAT, a power supply pin VCC, a ground pin GND, an oscillation pin OSC, and an antenna pin ANT;

The encoding chip U2 model is EV1527, which is provided with an output pin TXD and key pins K0 to K3;

The surface acoustic high-frequency resonator X1 is provided with an input pin 1 and an output pin 2;

in:

The key pins K0 to K3 of the coding chip U2 are connected to the remote control keys S4 to S1;

The output pin TXD of the coding chip U2 is connected in series with the current limiting resistor R6 and then connected to the input pin DAT of the high-frequency transmitting chip U1. At the same time, the output pin 2 of the high-frequency surface acoustic resonator X1 is also connected to the high-frequency transmitting chip U1. input pin DAT;

The oscillation pin OSC of the high-frequency transmitting chip U1 and the input pin 1 of the surface high-frequency resonator X1 are connected to the oscillation circuit, and the antenna pin ANT of the high-frequency transmitting chip U1 is connected to the input end of the power amplifier circuit.

Wherein, the power amplifier circuit includes a power amplifier transistor Q1, a resistor R1, inductances L4, L5, and capacitors C1, C5;

Among them, the antenna pin ANT of the high-frequency transmitter chip U1 is connected to the base of the power amplifier transistor Q1 through the capacitor C3, and the base of the power amplifier transistor Q1 is connected to the bias resistor R1 in parallel with the capacitor C3, and the collector of the power amplifier transistor Q1 is connected in parallel There is an inductor L4 and capacitors C1 and C5. The other end of the resistor R1 and the inductor L4 is connected to the power supply VCC. The other end of the capacitor C1 is connected to the antenna ANT in series with the inductor L5. The emitter of the power amplifier transistor Q1 and the other end of the capacitor C5 are grounded.

Wherein, the oscillation circuit includes inductors L1, L2 and capacitors C2, C6;

The inductor L2 is connected in parallel with the capacitor C6, and one end of the inductor L2 and the capacitor C6 is commonly connected to the power supply VCC, the other end of the capacitor C6 is grounded, and the other end of the inductor L2 is connected to the input pin 1 of the surface high-frequency resonator X1, one end of the inductor L2, and one end of the capacitor C2, the other end of the inductor L1 is connected to the oscillation pin OSC of the high frequency transmitting chip U1, and the other end of the capacitor C2 is grounded.

The high-power transmitting circuit of the long-distance remote controller of the utility model amplifies the remote control signal for the first time through a high-frequency transmitting chip, and then the signal amplified for the first time is amplified by the power amplifying circuit for the second time, so that the remote control signal passes through After two amplifications, its transmit power is greatly improved, and can reach about 17dBm, which can be used for long-distance remote control.

Description of drawings

FIG. 1 is a schematic diagram of the principle of the first embodiment of the high-power transmitting circuit of the remote remote controller of the present invention.

FIG. 2 is a schematic diagram of a high-power transmitting circuit of the present invention.

FIG. 3 is a schematic diagram of the connection of the high-frequency transmitting chip, the surface acoustic surface high-frequency resonator, and the oscillating circuit in FIG. 2 .

Description of reference numbers:

100-transmitting circuit, 10-remote control button, 20-encoding chip, 30-high-frequency transmitting chip, 40-acoustic surface high-frequency resonator, 50-oscillating circuit, 60-power amplifier circuit, 70-antenna.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments, and the contents of the embodiments are not intended to limit the protection scope of the present utility model.

Please refer to FIG. 1 to FIG. 2 , which are schematic block diagrams of a high-power high-frequency transmitting circuit 100 of a long-distance remote control of the present invention, including a remote control button 10, an encoding chip 20, a high-frequency transmitting chip 30, a high-frequency acoustic surface The resonator 40 , the oscillation circuit 50 , the power amplifier circuit 60 and the antenna 70 .

The input end of the encoding chip 20 is connected to the remote control button 10 , and the output end of the encoding chip 20 is connected to the high frequency transmitting chip 30 .

The high-frequency transmitting chip 30 is provided with a signal input terminal, an oscillation input terminal and a signal output terminal. , the signal output terminal is connected to the power amplifier circuit 60, and the high-frequency transmitting chip 30 modulates and amplifies the first power of the coded signal input from the coding chip 20 and the high-frequency signal input from the surface acoustic surface high-frequency resonator 40. The acoustic surface high-frequency resonator 40 provides a high-frequency carrier signal, such as a 433.92Mhz carrier signal, while the coding chip 20 provides the original remote control coding signal, and the remote control coding signal and the carrier signal are mixed and modulated in the high-frequency transmitting chip 30, And after the first power amplification.

The oscillating circuit 50 is connected to the input end of the surface acoustic high frequency resonator 40 and the oscillating input end of the high frequency transmitting chip 30 ;

The input end of the power amplifying circuit 60 is connected to the signal output end of the high-frequency transmitting chip 30, and its output end is connected to the antenna 70. The power amplifying circuit 60 performs a second power amplification on the modulated signal input by the high-frequency transmitting chip 30, Antenna 70 transmits.

In this way, the transmitter circuit 100 of the present invention amplifies the power of the remote control signal twice, which greatly improves the transmit power of the signal. Compared with the conventional remote control whose power is generally 10dBm at the maximum, the transmitter power of the remote control signal of the present invention can reach 17dBm. Left and right, can carry out long-distance remote control, such as long-distance open garage door and so on.

Specifically, as shown in FIG. 2 , the model of the high-frequency transmitting chip U1 is TDH9950, which is provided with an input pin DAT, a power supply pin VCC, a ground pin GND, an oscillation pin OSC, and an antenna pin ANT. The input pin DAT is the signal input end of the high frequency transmitting chip U1, the oscillation pin OSC is the oscillation input end of the high frequency transmitting chip U1, and the antenna pin ANT is the signal output end of the high frequency transmitting chip U1.

The encoding chip U2 has a model of EV1527, and is provided with an output pin TXD and key pins K0 to K3; the key pins K0 to K3 are the input ends of the encoding chip U2, and the output pin TXD is the output end of the encoding chip U2.

The SFA high-frequency resonator X1 is provided with an input pin 1 and an output pin 2 .

in:

The key pins K0 to K3 of the coding chip U2 are connected to the remote control keys S4 to S1. 4 keys can perform 16 kinds of coding combinations. It can be understood that the number of keys can be expanded according to actual needs.

The output pin TXD of the coding chip U2 is connected in series with the current limiting resistor R6 and then connected to the input pin DAT of the high-frequency transmitting chip U1. At the same time, the output pin 2 of the high-frequency surface acoustic resonator X1 is also connected to the high-frequency transmitting chip U1. Input pin DAT. The encoding chip U2 outputs the remote control signal to the input pin DAT of the high-frequency transmitting chip U1 through the output pin TXD, and the high-frequency carrier signal of the acoustic surface high-frequency resonator X1 outputs the high-frequency carrier signal to the input pin of the high-frequency transmitting chip U1 through the output pin 2. feet dat.

The oscillation pin OSC of the high frequency transmitting chip U1 and the input pin 1 of the surface high frequency resonator X1 are connected to the oscillation circuit 50 , and the antenna pin ANT of the high frequency transmitting chip U1 is connected to the input end of the power amplifier circuit 60 .

Please continue to refer to FIG. 2 , the power amplifier circuit 60 in the high-power transmitting circuit 100 of the present invention includes a power amplifier transistor Q1 , a resistor R1 , inductors L4 , L5 , and capacitors C1 , C5 .

Among them, the antenna pin ANT of the high-frequency transmitter chip U1 is connected to the base of the power amplifier transistor Q1 through the capacitor C3, and the base of the power amplifier transistor Q1 is connected to the bias resistor R1 in parallel with the capacitor C3, and the collector of the power amplifier transistor Q1 is connected in parallel There is an inductor L4 and capacitors C1 and C5. The other end of the resistor R1 and the inductor L4 is connected to the power supply VCC. The other end of the capacitor C1 is connected to the antenna ANT in series with the inductor L5. The emitter of the power amplifier transistor Q1 and the other end of the capacitor C5 are grounded.

The base of the transistor Q1 is used as the input terminal of the power amplifying circuit 60. The high-frequency transmitting chip U1 outputs the remote control signal of the first power amplification through the antenna pin ANT of U1, and filters the low-frequency interference of the power supply by the capacitor C3 and then inputs it to the transistor. The base of Q1 is then output through the inductor L5 after the second power amplification of the transistor Q1, and is transmitted from the antenna ANT to the outside. Inductors L4 and L5, and capacitors C1 and C5 perform filtering and frequency selection to match the antenna.

As shown in FIG. 3 , the oscillation circuit 50 includes inductors L1 and L2 and capacitors C2 and C6 .

The inductor L2 is connected in parallel with the capacitor C6, and one end of the inductor L2 and the capacitor C6 is commonly connected to the power supply VCC, the other end of the capacitor C6 is grounded, and the other end of the inductor L2 is connected to the input pin 1 of the surface high-frequency resonator X1, one end of the inductor L2, and one end of the capacitor C2, the other end of the inductor L1 is connected to the oscillation pin OSC of the high frequency transmitting chip U1, and the other end of the capacitor C2 is grounded. The oscillation circuit 50 provides the basic operating frequency for the surface high-frequency resonator X1 and the high-frequency transmitting chip U1.

The high-power transmitting circuit 100 of the long-distance remote control proposed by the present invention amplifies the remote control signal for the first time through the high-frequency transmitting chip 30, and then amplifies the signal amplified for the first time through the power amplifying circuit 60 for the second time. In this way, after the remote control signal in the remote control is amplified twice by the high-power transmitting circuit 100, the transmit power is greatly improved, and can reach about 17dBm, which can be used for long-distance remote control to meet the needs of long-distance remote control in fields such as smart homes.

The above is only an example to clearly illustrate the present invention, and is not intended to limit the patent scope of the present invention. It is impossible to list all the embodiments here. Equivalent structural transformations made by the content in the scheme, or direct/indirect application in other related technical fields are all included in the scope of patent protection of the present invention.

Claims (4)

1. A high-power high-frequency transmitting circuit of a remote controller is characterized by comprising a remote control key, a coding chip, a high-frequency transmitting chip, a sound surface high-frequency resonator, an oscillating circuit, a power amplifying circuit and an antenna;

the input end of the coding chip is connected with the remote control key, the output end of the coding chip is connected with the high-frequency transmitting chip, and the coding chip codes a key signal of the remote control key and outputs a coding signal to the high-frequency transmitting chip;

the high-frequency transmitting chip is provided with a signal input end, an oscillation input end and a signal output end, the signal input end of the high-frequency transmitting chip is connected with the output end of the sound surface high-frequency resonator and the output end of the coding chip, the signal output end of the high-frequency transmitting chip is connected with the power amplifying circuit, and the high-frequency transmitting chip modulates the coding signal input by the coding chip and the high-frequency signal input by the sound surface high-frequency resonator and amplifies the power for the first time;

the oscillation circuit is connected with the input end of the sound surface high-frequency resonator and the oscillation input end of the high-frequency transmitting chip;

the input end of the power amplifying circuit is connected with the signal output end of the high-frequency transmitting chip, the output end of the power amplifying circuit is connected with the antenna, and the modulated signal input by the high-frequency transmitting chip is subjected to secondary power amplification by the power amplifying circuit and then transmitted through the antenna.

2. The high-power high-frequency transmitting circuit according to claim 1, wherein the high-frequency transmitting chip U1 is model number TDH9950, and is provided with an input pin DAT, a power supply pin VCC, a ground pin GND, an oscillation pin OSC, and an antenna pin ANT;

the encoding chip U2 is EV1527 in model, and is provided with an output pin TXD and key pins K0-K3;

the sound surface high-frequency resonator X1 is provided with an input pin 1 and an output pin 2;

wherein:

the key pins K0 to K3 of the coding chip U2 are connected with remote control keys S4 to S1;

an output pin TXD of the coding chip U2 is connected with an input pin DAT of the high-frequency emission chip U1 after being connected with a current-limiting resistor R6 in series, and an output pin 2 of the sound surface high-frequency resonator X1 is also connected with the input pin DAT of the high-frequency emission chip U1;

the oscillation pin OSC of the high-frequency transmitting chip U1 and the input pin 1 of the surface high-frequency resonator X1 are connected to an oscillation circuit, and the antenna pin ANT of the high-frequency transmitting chip U1 is connected to an input terminal of a power amplification circuit.

3. The high-power high-frequency transmitting circuit according to claim 2, wherein the power amplifying circuit comprises a power amplifier transistor Q1, a resistor R1, inductors L4 and L5, capacitors C1 and C5;

an antenna pin ANT of the high-frequency transmitting chip U1 is connected to a base electrode of a power amplifier triode Q1 through a capacitor C3, a base electrode of the power amplifier triode Q1 is connected with a bias resistor R1 connected with a capacitor C3 in parallel, a collector electrode of the power amplifier triode Q1 is connected with an inductor L4, capacitors C1 and C5 in parallel, the other ends of the resistor R1 and the inductor L4 are connected with a power supply VCC, the other end of the capacitor C1 is connected with an inductor L5 in series and then connected to the antenna ANT, and an emitting electrode of the power amplifier triode Q1 and the other end of the capacitor C5 are grounded.

4. The high power high frequency transmitting circuit according to claim 2, wherein the oscillating circuit comprises inductors L1, L2 and capacitors C2, C6;

the inductor L2 is connected in parallel with the capacitor C6, one end of the inductor L2 and one end of the capacitor C6 are connected with a power supply VCC, the other end of the capacitor C6 is grounded, the other end of the inductor L2 is connected with the input pin 1 of the surface high-frequency resonator X1, one end of the inductor L2 and one end of the capacitor C2, the other end of the inductor L1 is connected with the oscillation pin OSC of the high-frequency emission chip U1, and the other end of the capacitor C2 is grounded.

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