CN210899143U - Transceiver circuit of interphone - Google Patents
Transceiver circuit of interphone Download PDFInfo
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- CN210899143U CN210899143U CN202020067241.9U CN202020067241U CN210899143U CN 210899143 U CN210899143 U CN 210899143U CN 202020067241 U CN202020067241 U CN 202020067241U CN 210899143 U CN210899143 U CN 210899143U
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Abstract
The utility model relates to the technical field of wireless interphone, and discloses a transceiver circuit of an interphone with high integrated circuit, simple circuit and simple debugging, which comprises an oscillating circuit arranged in the transceiver circuit, wherein the oscillating signal end of a controller is coupled with the output end of the oscillating circuit; the low-noise amplifier output/power amplifier input end of the CMOS integrated circuit is connected with the antenna end of the controller; the antenna is used for transmitting or receiving high-frequency signals; the microcontroller is connected with the radio frequency signal input end of the controller and is used for adjusting the radio frequency range of the controller so that the controller can select different channels.
Description
Technical Field
The utility model relates to a wireless intercom technical field, more specifically say, relate to a transceiver circuit of intercom.
Background
The interphone is a common communication device in the technical field of wireless communication. In the past, when an interphone is used for conversation, the noise of the interphone is loud and the conversation sound is unclear, so that the transmission quality of information is low.
Therefore, the prior art provides a transceiver circuit of an interphone with small noise and clear conversation sound, which effectively improves the transmission quality of information. However, the circuit structure of the conventional interphone is complex, so that the debugging is complex and unstable, the cost is high during manufacturing and use, and the utilization of frequency resources is not economical.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, the circuit structure to the above-mentioned intercom of prior art is comparatively complicated for the complicated and unstable defect of debugging provides a high integrated circuit, the simple transceiver circuit of just debugging simple intercom of circuit.
The utility model provides a technical scheme that its technical problem adopted is: a transceiver circuit of an interphone is constructed, and the transceiver circuit is provided with:
an oscillation circuit configured in the transceiver circuit, the oscillation circuit being configured to generate a pulse signal;
the oscillation signal end of the controller is coupled to the output end of the oscillation circuit;
the low-noise amplifier output/power amplifier input end of the CMOS integrated circuit is connected with the antenna end of the controller;
the antenna is connected with the low-noise amplifier input/power amplifier output end of the CMOS integrated circuit and used for transmitting or receiving high-frequency signals;
a microcontroller connected to the radio frequency signal input of the controller, the microcontroller being configured to adjust the radio frequency range of the controller to enable the controller to select different channels.
In some embodiments, the CMOS integrated circuit includes a low noise amplifier and a power amplifier,
the input end of the low-noise amplifier and the output end of the power amplifier are respectively connected with the antenna;
the output end of the low-noise amplifier and the input end of the power amplifier are respectively connected with the antenna end of the controller.
In some embodiments, the device further comprises a first capacitor, and the first capacitor is arranged between the low-noise amplifier output/power amplifier input end of the CMOS integrated circuit and the antenna end of the controller.
In some embodiments, the oscillation circuit includes a crystal oscillator, a twelfth capacitor and a thirteenth capacitor,
one end of the crystal oscillator is respectively connected with one end of the twelfth capacitor and one crystal oscillator end of the controller;
the other end of the crystal oscillator is respectively connected with one end of the thirteenth capacitor and the other crystal oscillator end of the controller;
and the other ends of the twelfth capacitor and the thirteenth capacitor are respectively connected with a common end.
In some embodiments, the circuit further comprises a first resistor and a second resistor,
the first resistor and the second resistor are connected in series,
one end of the first resistor and one end of the second resistor are respectively connected with the adjusting end of the controller.
In some embodiments, the circuit further comprises a third resistor and a fourth resistor, wherein the fourth resistor is an adjustable resistor,
the third resistor and the fourth resistor are connected in series,
one end of the third resistor and one end of the fourth resistor are respectively connected with the sound adjusting end of the controller.
In the transceiver circuit of the intercom of the utility model, the oscillation circuit, the controller, the CMOS integrated circuit, the antenna and the microcontroller, wherein, the low noise amplifier output/power amplifier input end of the CMOS integrated circuit is connected with the antenna end of the controller, and the antenna is used for transmitting or receiving high frequency signals; the microcontroller is used for adjusting the radio frequency range of the controller, so that the controller can select different channels. Compared with the prior art, the channel is changed through the programming of the microcontroller, on one hand, the circuit structure of the existing interphone can be simplified, and the problems of complexity and instability of the traditional circuit debugging are effectively solved; on the other hand, the radio frequency range of the controller can be adjusted, so that the controller can select different channels, and the economy of frequency resource utilization is further improved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a partial circuit diagram of an embodiment of a transceiver circuit of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a partial circuit diagram of an embodiment of a transceiver circuit of the present invention. As shown in fig. 1, in the first embodiment of the transceiver circuit of the intercom of the present invention, the transceiver circuit 100 of the intercom mainly includes an oscillating circuit 101, a controller U1, a CMOS integrated circuit U2, an antenna (corresponding to ANT Port) and a microcontroller MCU.
The oscillation circuit 101 is disposed in the transceiver circuit 100 and configured to generate a pulse signal, and input the pulse signal to the controller U1 to provide a pulse signal required by the controller U1, thereby triggering the controller U1 to operate.
The controller U1 has an intercom function, integrates a high-performance phase-locked loop, an analog-to-digital converter, a digital-to-analog converter, a radio frequency receiving/transmitting channel, a crystal oscillator and an audio power amplifier, and has excellent digital signal processing capability.
The oscillation signal terminal (corresponding to XTALP and XTALN terminals) of the controller U1 is coupled to the output terminal of the oscillation circuit 101 for obtaining the required clock pulse through the oscillation circuit 101 pulse signal to the controller U1.
Further, CMOS integrated circuits are mainly used in receiving circuits and transmitting circuits.
The signal-to-noise ratio in the receiving circuit is usually very low, and the signal is much smaller than the noise, and when passing through the amplifier, if the signal and the noise are amplified together, the subsequent processing is very unfavorable, which requires that the amplifier can suppress the noise.
The main function of the transmitting circuit is power amplification to meet the system requirements, and the most important index is the output power, which is generally used in the last stage of the transmitter.
Specifically, the low-noise amplifier output/power amplifier input terminal of the CMOS integrated circuit U2 is connected to the antenna terminal ANT of the controller U1.
The antenna (corresponding to the ANT port end) is connected with the low-noise amplifier input/power amplifier output end of the CMOS integrated circuit U2 and is used for transmitting high-frequency signals processed by the CMOS integrated circuit U2 of the controller U1 and receiving high-frequency signals transmitted by other interphones.
Specifically, when the antenna is in a transmitting state, a data signal transmitted by the controller U1 is modulated into a high-frequency signal, the high-frequency signal is input to a power amplifier of the CMOS integrated circuit U2, the high-frequency signal is amplified by the power amplifier to generate a rated radio frequency power, the harmonic component is suppressed by the antenna low-pass filter, and the radio frequency power is transmitted through the antenna.
When the antenna is in a receiving state, a low noise amplifier of the CMOS integrated circuit U2 amplifies a radio frequency signal, inputs the radio frequency signal into a mixer for mixing and generating an intermediate frequency signal, and the intermediate frequency signal further eliminates clutter signals of adjacent channels through a crystal filter. The filtered intermediate frequency signal is input into a controller U1, and the intermediate frequency signal is amplified and frequency discriminated after useless spurious signals are filtered by a ceramic filter, so that an audio signal is generated.
Furthermore, the microcontroller MCU has the functions of programming, calculating, presetting the frequency range of the channel, and outputting commands.
The signal output end of the microcontroller MCU is connected to the rf signal input end (corresponding to the ends B0, C0, C1, and C2) of the controller U1, respectively, and outputs a preset frequency range of channels to the rf signal input end of the controller U1, respectively, which is used to adjust the rf range of the controller U1, so that the controller U1 can select different channels.
For example, the frequency range of the channel input by the microcontroller MCU from the rf signal input terminal (corresponding to the B0 terminal) of the controller U1 is 144 MHZ to 146MHZ, and the controller U1 can access the operating frequency of the band.
The frequency range of the channel input by the microcontroller MCU through the radio frequency signal input end (corresponding to the C0 end) of the controller U1 is 409-410 MHz, and the controller U1 can access the working frequency of the band.
The frequency range of the channel input by the microcontroller MCU is 420-429 MHZ when the radio frequency signal input end (corresponding to the end C1) of the controller U1 receives the input of the microcontroller MCU, and the controller U1 can access the working frequency of the band.
The frequency range of the channel input by the microcontroller MCU is 430-440 MHz when the radio frequency signal input end (corresponding to the C2 end) of the controller U1 is received, and the controller U1 can access the working frequency of the band.
The working frequency conforming to the interphone is set through the microcontroller MCU, on one hand, a user can easily communicate through the interphone at a place where a network is not covered, the interphone can provide a one-to-one or one-to-many communication mode, the operation is simple, the communication is more free, and the quality of information transmission can be improved under the conditions of emergency scheduling and collective cooperation work; on the other hand, the circuit structure of the interphone can be simplified, the problems that the traditional circuit debugging is complex and unstable are effectively solved, the radio frequency range of the controller U1 can be effectively adjusted by changing the channel through the programming of the microcontroller MCU, so that the controller U1 can select different channels, and the economy of frequency resource utilization is further improved.
In some embodiments, a low noise amplifier (not shown) and a power amplifier (not shown) may be disposed in the CMOS integrated circuit U2 for improving the processing effect of the received signal or the transmitted signal.
Low noise amplifiers are used as high or intermediate frequency preamplifiers for receivers, and as amplification circuits for high sensitivity electronic detection devices.
A power amplifier is an amplifier that can generate the maximum rf power output to drive a certain load under a given distortion rate.
Specifically, the input terminal of the low noise amplifier and the output terminal of the power amplifier are connected to an antenna (corresponding to the ANTPort terminal), respectively.
The output terminal of the low noise amplifier and the input terminal of the power amplifier are connected to an antenna terminal (corresponding to ANT terminal) of the controller U1, respectively.
That is, the high frequency signal received by the antenna is processed by the low noise amplifier, and then input to the controller U1 for demodulation (i.e., mixing, filtering and analog-to-digital conversion), and converted into a voice signal, and then output from the speaker.
The controller U1 receives the voice signal inputted by the user, the inputted signal is modulated (i.e. analog-to-digital conversion, filtering and mixing) by the controller U1, the low frequency signal is converted into the high frequency signal, and the high frequency signal is inputted to the signal input end of the power amplifier, and the high frequency signal is loaded to the antenna by the power amplifier and is transmitted.
In some embodiments, to improve the performance of the CMOS integrated circuit U2, a first capacitor C1 may be provided between the low noise amplifier output/power amplifier input of the CMOS integrated circuit U2 and the antenna terminal (corresponding to the ANT terminal) of the controller U2.
It should be noted that the capacity of the first capacitor C1 is set to be 1nF, which is used to adjust the resonant frequency of the antenna, so that the antenna operates at a desired frequency point.
In some embodiments, the oscillating circuit 101 includes a crystal oscillator Y1, a twelfth capacitor C12, and a thirteenth capacitor 13.
The crystal oscillator Y1 is used to generate clock pulses.
Specifically, one end of the crystal oscillator Y1 is connected to one end of the twelfth capacitor C12 and one crystal oscillator end (corresponding to the XTALP end) of the controller U1, respectively, and the other end of the crystal oscillator Y1 is connected to one end of the thirteenth capacitor C13 and the other crystal oscillator end (corresponding to the XTALN end) of the controller U1, respectively.
The other ends of the twelfth capacitor C12 and the thirteenth capacitor C12 are connected to a common terminal.
The pulse signal generated by the oscillation circuit 101 is input to the controller U1 through both ends of the crystal oscillator Y1, and provides clock pulses required for the operation of the controller U1.
In some embodiments, the device further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.
The first resistor R1 and the second resistor R2 are connected in series, the third resistor R3 and the fourth resistor R4 are connected in series, and the two series circuits are connected in parallel.
The fourth resistor R4 is an adjustable resistor.
Specifically, one end of the first resistor R1 and one end of the second resistor R2 are respectively connected to the regulation end (corresponding to SQ end) of the controller U1.
One end of the third resistor R3 and one end of the fourth resistor R4 are connected to the audio adjustment end (VOL end) of the controller U1, respectively.
That is, the frequency range of the controller U1 can be changed by adjusting the regulation terminal (corresponding to SQ terminal) of the controller U1.
By adjusting the sound adjustment end (corresponding to the VOL end) of the controller U1, the volume of the speaker of the intercom can be changed.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (6)
1. A transceiver circuit of an interphone is characterized by comprising:
an oscillation circuit configured in the transceiver circuit, the oscillation circuit being configured to generate a pulse signal;
the oscillation signal end of the controller is coupled to the output end of the oscillation circuit;
the low-noise amplifier output/power amplifier input end of the CMOS integrated circuit is connected with the antenna end of the controller;
the antenna is connected with the low-noise amplifier input/power amplifier output end of the CMOS integrated circuit and used for transmitting or receiving high-frequency signals;
a microcontroller connected to the radio frequency signal input of the controller, the microcontroller being configured to adjust the radio frequency range of the controller to enable the controller to select different channels.
2. The transceiver circuit of an intercom according to claim 1,
the CMOS integrated circuit includes a low noise amplifier and a power amplifier,
the input end of the low-noise amplifier and the output end of the power amplifier are respectively connected with the antenna;
the output end of the low-noise amplifier and the input end of the power amplifier are respectively connected with the antenna end of the controller.
3. The transceiver circuit of an intercom according to claim 2,
the CMOS integrated circuit further comprises a first capacitor, and the first capacitor is arranged between the low-noise amplifier output/power amplifier input end of the CMOS integrated circuit and the antenna end of the controller.
4. The transceiver circuit of an intercom according to claim 1,
the oscillating circuit comprises a crystal oscillator, a twelfth capacitor and a thirteenth capacitor,
one end of the crystal oscillator is respectively connected with one end of the twelfth capacitor and one crystal oscillator end of the controller;
the other end of the crystal oscillator is respectively connected with one end of the thirteenth capacitor and the other crystal oscillator end of the controller;
and the other ends of the twelfth capacitor and the thirteenth capacitor are respectively connected with a common end.
5. The transceiver circuit of an intercom according to claim 1,
also includes a first resistor and a second resistor,
the first resistor and the second resistor are connected in series,
one end of the first resistor and one end of the second resistor are respectively connected with the adjusting end of the controller.
6. The transceiver circuit of an intercom according to claim 5,
also comprises a third resistor and a fourth resistor, wherein the fourth resistor is an adjustable resistor,
the third resistor and the fourth resistor are connected in series,
one end of the third resistor and one end of the fourth resistor are respectively connected with the sound adjusting end of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020067241.9U CN210899143U (en) | 2020-01-13 | 2020-01-13 | Transceiver circuit of interphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020067241.9U CN210899143U (en) | 2020-01-13 | 2020-01-13 | Transceiver circuit of interphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210899143U true CN210899143U (en) | 2020-06-30 |
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ID=71319483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020067241.9U Expired - Fee Related CN210899143U (en) | 2020-01-13 | 2020-01-13 | Transceiver circuit of interphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210899143U (en) |
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2020
- 2020-01-13 CN CN202020067241.9U patent/CN210899143U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200630 Termination date: 20210113 |