Frequency modulation module and wireless communication equipment

Abstract

The utility model provides a frequency modulation module and a wireless communication device, the frequency modulation module comprises an information reading device and an information carrier, the information reading device comprises a data reading end and a data output end, and the information reading device is used for outputting data read by the data reading end through the data output end; preset frequency division information is stored in the information carrier; and the data reading end is connected with the information carrier through a preset connection mode between the information reading equipment and the information carrier. According to the frequency modulation module, the frequency dividing ratio is adjusted by the frequency divider through cooperation of the information reading device and the information carrier, frequency adjustment of the frequency modulation module can be achieved by replacing the information carrier, and compared with the prior art, the frequency modulation module has the advantages of being low in operation threshold and the like; according to the wireless communication equipment applying the frequency modulation module, different wireless communication equipment can keep same-frequency communication only by being configured with the same information carrier, and the wireless communication equipment has good usability and stability in specific application occasions.

Description

Technical Field

[0001] The utility model relates to the field of communication equipment, in particular to a frequency modulation module and a wireless communication device. Background Art

[0002] The frequency modulation module is used to provide a radio frequency signal with a specific frequency for a wireless communication device. In commonly used wireless communication devices, a voltage controlled oscillator (VCO) is generally used as a radio frequency signal generating element. The VCO is essentially an oscillator controlled by an input voltage (usually an analog voltage). In order to control the radio frequency signal generated by the voltage controlled oscillator, a phase locked loop is usually used to control the voltage controlled oscillator.

[0003] Figure 1 FIG. is a schematic structural diagram of a phase locked loop under the prior art. The basic structure of the phase locked loop includes a reference frequency element, a phase detector, a low pass filter, a VCO, a frequency divider, and a register. The reference frequency element is used to provide a reference frequency f ref , the output frequency f out of the VCO is adjusted to the same order of magnitude as the reference frequency through the frequency divider and then fed back to the phase detector for comparison with the reference frequency f ref , and the phase detector outputs an analog voltage according to the comparison result and controls the operation of the VCO after filtering through the low pass filter.

[0004] The frequency divider has an adjustment parameter division ratio N. When the VCO stably outputs a radio frequency, f out = N * f ref . To realize the frequency modulation function of the frequency modulation module, essentially, the reference frequency of the reference frequency element and the division ratio N are adjusted. In civilian-level wireless communication devices, the reference frequency of the reference frequency element is generally fixed. Therefore, the frequency modulation function of the frequency modulation module mainly adjusts the division ratio N.

[0005] Specifically, the frequency divider has an adjustment interface for adjusting the corresponding division ratio. At present, the frequency modulation structure of wireless communication devices on the market is generally a knob structure or a numerical control structure. The knob structure mainly changes the detection voltage through a variable potentiometer, and then the MCU reads the change of the detection voltage and converts it into the channel required by the user to adjust the frequency divider; similarly, the wireless communication device with a numerical control structure directly reads the channel frequency required by the user through the MCU and directly adjusts the frequency divider.

[0006] In practical applications, both the knob structure and the numerical control structure of wireless communication devices require a process for users to adjust the channel. For new users, the operation is too cumbersome, which is not conducive to the use of new users and has great professional limitations. Summary of the Invention

[0007] An embodiment of the present utility model provides a frequency modulation module and a wireless communication device. The channel adjustment of the frequency modulation module is realized by the cooperation of an information reading device and an information carrier. In practical applications, it can eliminate the operation of channel adjustment by users, greatly simplify the operation threshold of the corresponding device, and has good usability.

[0008] Correspondingly, the present utility model provides a frequency modulation module. The frequency modulation module includes a reference frequency element, a phase detector, a low-pass filter, a frequency divider, a voltage-controlled oscillator, and a register for storing frequency division information.

[0009] The reference frequency element includes a reference frequency output terminal.

[0010] The phase detector includes a reference input terminal, a feedback input terminal, and a phase detection output terminal.

[0011] The low-pass filter includes a filter input terminal and a filter output terminal.

[0012] The voltage-controlled oscillator includes a voltage input terminal and a frequency output terminal.

[0013] The frequency divider includes a frequency division input terminal, a frequency division output terminal, and a frequency division control terminal. The frequency divider adjusts the frequency division ratio according to the frequency division information read by the frequency division control terminal.

[0014] The register has a frequency division information reading terminal and a frequency division information writing terminal.

[0015] The reference frequency output terminal is connected to the reference input terminal.

[0016] The phase detection output terminal is connected to the filter input terminal.

[0017] The filter output terminal is connected to the voltage input terminal.

[0018] The frequency output terminal is connected to the frequency division input terminal.

[0019] The frequency division output terminal is connected to the feedback input terminal.

[0020] The frequency division information reading terminal is connected to the frequency division control terminal.

[0021] It further includes an information reading device and an information carrier. The information reading device includes a data reading terminal and a data output terminal. The information reading device is used to output the data read by the data reading terminal through the data output terminal.

[0022] The information carrier stores preset frequency division information.

[0023] The data reading terminal is connected to the information carrier through a preset connection method between the information reading device and the information carrier.

[0024] The data output terminal is connected to the frequency division information writing terminal.

[0025] In an alternative embodiment, the information carrier is an RFID card, and the information reading device is a reader corresponding to the RFID card.

[0026] In an alternative embodiment, the RFID card includes an electronic tag chip and an electronic tag housing, and the electronic tag chip is disposed inside the electronic tag housing.

[0027] In an alternative embodiment, the structure of the electronic tag housing is an SD card structure.

[0028] In an alternative embodiment, the structure of the electronic tag housing is a TF card structure.

[0029] Correspondingly, the present utility model further provides a wireless communication device, which is characterized by including the frequency modulation module described above.

[0030] In an alternative embodiment, the number of the frequency modulation modules is two, and the two frequency modulation modules are a first frequency modulation module and a second frequency modulation module respectively;

[0031] The information carrier in the first frequency modulation module is a first information carrier, and the information carrier in the second frequency modulation module is a second information carrier;

[0032] The first information carrier and the second information carrier respectively have preset frequency division information.

[0033] In an alternative embodiment, it further includes a housing and a circuit board;

[0034] The circuit board is disposed inside the housing;

[0035] The reference frequency element, phase discriminator, low-pass filter, frequency divider, register and voltage controlled oscillator are integrated on the circuit board;

[0036] An installation position for fixing the information carrier is provided on the housing, the information reading device is fixed on the housing, and the installation position of the information reading device corresponds to the installation position, and the information carrier is fixed on the installation position.

[0037] In an alternative embodiment, the installation position is an SD card slot or a TF card slot.

[0038] In summary, the present utility model provides a frequency modulation module and a wireless communication device. By using the cooperation between an information reading device and an information carrier, the frequency divider can adjust the division ratio. By replacing the information carrier, the frequency adjustment of the frequency modulation module can be achieved, which has advantages such as a low operation threshold compared with the prior art. For a wireless communication device applying this frequency modulation module, different wireless communication devices only need to be configured with the same information carrier to maintain the same frequency communication, and it has good usability and stability in specific application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a schematic structural diagram of a phase-locked loop under the prior art.

[0041] Figure 2 It is a schematic structural diagram of the frequency modulation module according to an embodiment of the present utility model.

[0042] Figure 3 It is a three-dimensional structural diagram of the wireless communication device according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0044] Figure 2 It is a schematic structural diagram of the frequency modulation module according to an embodiment of the present utility model.

[0045] Specifically, the embodiment of the present utility model provides a frequency modulation module, and the frequency modulation module includes a reference frequency element, a phase detector, a low-pass filter, a frequency divider, a voltage-controlled oscillator, and a register for storing frequency division information;

[0046] The reference frequency element includes a reference frequency output terminal;

[0047] The phase detector includes a reference input terminal, a feedback input terminal, and a phase detection output terminal;

[0048] The low-pass filter includes a filter input terminal and a filter output terminal;

[0049] The voltage controlled oscillator includes a voltage input terminal and a frequency output terminal;

[0050] The frequency divider includes a frequency division input terminal, a frequency division output terminal and a frequency division control terminal, and the frequency divider adjusts the frequency division ratio according to the frequency division information read by the frequency division control terminal;

[0051] The register has a frequency division information reading terminal and a frequency division information writing terminal;

[0052] The reference frequency output terminal is connected to the reference input terminal;

[0053] The phase discrimination output terminal is connected to the filter input terminal;

[0054] The filter output terminal is connected to the voltage input terminal;

[0055] The frequency output terminal is connected to the frequency division input terminal;

[0056] The frequency division output terminal is connected to the feedback input terminal;

[0057] The frequency division information reading terminal is connected to the frequency division control terminal.

[0058] The frequency modulation module of the embodiment of the present invention further includes an information reading device and an information carrier.

[0059] Specifically, the information reading device includes a data reading terminal and a data output terminal, and the information reading device is used to output the data read by the data reading terminal through the data output terminal.

[0060] The information carrier stores preset frequency division information. It should be noted that the frequency division information does not represent the frequency division ratio N itself, and the frequency divider can confirm its frequency division ratio N through the preset built-in logic according to the frequency division information.

[0061] The data reading terminal is connected to the information carrier through a preset connection manner between the information reading device and the information carrier; the data output terminal is connected to the frequency division information writing terminal.

[0062] In the frequency modulation module of the embodiment of the present invention, the adjustment of the frequency division ratio N of the frequency divider is realized by the frequency divider reading the frequency division control terminal of the register, and the frequency division information in the register is adjusted by the information reading device. The reading object of the information reading device is an information carrier, and the required frequency division information is recorded in the information carrier.

[0063] An alternative embodiment, wherein the information carrier is an RFID card, and the information reading device is a reader corresponding to the RFID card. Specifically, the frequency modulation module needs to be applied to a physical device. The RFID card provides the frequency division information for the reader in a radio frequency manner. There is no need for contact between the information carrier and the information reading device, which can reduce the wear between the two and improve their durability.

[0064] Specifically, the RFID card includes an electronic tag chip and an electronic tag housing, and the electronic tag chip is disposed inside the electronic tag housing.

[0065] An alternative embodiment, wherein the structure of the electronic tag housing is an SD card structure.

[0066] An alternative embodiment, wherein the structure of the electronic tag housing is a TF card structure.

[0067] Specifically, the advantage of selecting the SD card structure or the TF card structure for the structure of the electronic tag housing is that both the SD card structure and the TF card structure are relatively mature physical application structures, and they have relevant supporting card slot structures. When the frequency modulation module is applied to a wireless communication device, it can effectively reduce the development and production costs of the wireless communication device.

[0068] Correspondingly, an embodiment of the present invention further provides a wireless communication device, which includes the above-mentioned frequency modulation module. Specifically, an embodiment of the present invention uses a walkie-talkie device as an example to illustrate the application of the frequency modulation module in a wireless communication device.

[0069] Specifically, analog walkie-talkies usually use a half-duplex communication method (only transmitting or receiving at the same time). Depending on the type of walkie-talkie, the frequencies in the transmit mode and the receive mode of the walkie-talkie can be the same or different. When the frequencies in the transmit mode and the receive mode of the walkie-talkie are the same, the radio frequency module can be used in a multiplexed form, applying the same radio frequency module to the transmit loop and the receive loop of the walkie-talkie. When the frequencies in the transmit mode and the receive mode of the walkie-talkie are different (such as a superheterodyne structure walkie-talkie), based on the frequency adjustment characteristics of the embodiment of the present invention, two frequency modulation modules need to be equipped in the walkie-talkie.

[0070] Specifically, the number of the frequency modulation modules is two, and the two frequency modulation modules are a first frequency modulation module and a second frequency modulation module respectively;

[0071] The information carrier in the first frequency modulation module is a first information carrier, and the information carrier in the second frequency modulation module is a second information carrier;

[0072] The first information carrier and the second information carrier have preset frequency division information.

[0073] Further, an embodiment of the present utility model provides an entity structure of a wireless communication device for reference.

[0074] Figure 3 It is a three-dimensional structure schematic diagram of the wireless communication device according to the embodiment of the present utility model.

[0075] Specifically, on the basis described above, the wireless communication device according to the embodiment of the present utility model further includes a housing 10 and a circuit board 14;

[0076] The circuit board 14 is disposed inside the housing 10;

[0077] The reference frequency element, phase discriminator, low-pass filter, frequency divider, register, and voltage controlled oscillator are integrated on the circuit board;

[0078] An installation position for fixing the information carrier is provided on the housing, the information reading device is fixed on the housing, and the installation position of the information reading device corresponds to the installation position, and the information carrier is fixed on the installation position.

[0079] The installation position is an SD card slot 15 or a TF card slot 18.

[0080] Specifically, in the embodiment of the present utility model, the housing is divided into an upper housing and a lower housing. The circuit board is fixed on the lower housing, and the SD card slot 15 and the TF card slot 18 are integrated on the circuit board. To avoid signal interference, the SD card slot 15 and the TF card slot 18 are made of plastic material. The structure of the electronic tag housing of the first information carrier 16 selects the SD card structure, and the structure of the electronic tag housing of the second information carrier 17 selects the TF card structure; the information reading device is fixed at the corresponding position on the upper housing and is connected to the circuit board through a cable. When the upper housing and the lower housing are assembled, the information reading device will be close to the corresponding SD card slot or TF card slot. In addition, in the illustrated structure of the wireless communication device, the wireless communication device further has an antenna, a microphone 12 and a speaker 11 fixed on the upper housing.

[0081] In actual implementation, if there are requirements for airtightness or waterproofness, a sealing cover can be provided at the corresponding positions of the housing corresponding to the SD card slot 15 and the TF card slot 18, or the SD card slot 15 and the TF card slot 18 with a closed structure can be directly adopted; since only the matching structure of the card slot and the corresponding data card is actually adopted in the embodiment of the present invention, and the data transmission depends on the wireless transmission between the information carrier and the information reading device, adopting the SD card slot 15 and the TF card slot 18 with a closed structure will not affect its actual function.

[0082] It should be noted that the TF card itself is a circuit board. In actual implementation, if the structure of the electronic tag housing is selected as the TF card structure, the electronic tag chip can adopt a flexible PCB chip and then be wrapped by the electronic tag housing.

[0083] In addition, the remaining circuit structures of the wireless communication device in the transmitting circuit and the receiving circuit can be implemented with reference to the prior art, and no additional description is given in the embodiments of the present invention.

[0084] In summary, the present invention provides a frequency modulation module and a wireless communication device. By using the cooperation of the information reading device and the information carrier, the frequency divider can adjust the frequency division ratio. By replacing the information carrier, the frequency adjustment of the frequency modulation module can be achieved, which has advantages such as a low operation threshold compared with the prior art. For the wireless communication device applying this frequency modulation module, different wireless communication devices only need to be configured with the same information carrier to maintain the same-frequency communication, and have good usability and stability in specific application scenarios.

[0085] The above has introduced in detail a frequency modulation module and a wireless communication device provided by the embodiments of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A frequency modulation module, the frequency modulation module comprising a reference frequency element, a phase detector, a low-pass filter, a frequency divider, a voltage controlled oscillator, and a register for storing frequency division information; The reference frequency element includes a reference frequency output terminal; The phase detector includes a reference input terminal, a feedback input terminal, and a phase detection output terminal; The low-pass filter includes a filter input terminal and a filter output terminal; The voltage controlled oscillator includes a voltage input terminal and a frequency output terminal; The frequency divider includes a frequency division input terminal, a frequency division output terminal, and a frequency division control terminal, and the frequency divider adjusts the frequency division ratio according to the frequency division information read by the frequency division control terminal; The register has a frequency division information reading terminal and a frequency division information writing terminal; The reference frequency output terminal is connected to the reference input terminal; The phase detection output terminal is connected to the filter input terminal; The filter output terminal is connected to the voltage input terminal; The frequency output terminal is connected to the frequency division input terminal; The frequency division output terminal is connected to the feedback input terminal; The frequency division information reading terminal is connected to the frequency division control terminal; It is characterized in that it further includes an information reading device and an information carrier, the information reading device includes a data reading terminal and a data output terminal, and the information reading device is used to output the data read by the data reading terminal through the data output terminal; The information carrier stores preset frequency division information; The data reading terminal is connected to the information carrier through a preset connection method between the information reading device and the information carrier; The data output terminal is connected to the frequency division information writing terminal.

2. The frequency modulation module according to claim 1, wherein The information carrier is an RFID card, and the information reading device is a reader corresponding to the RFID card.

3. The FM module according to claim 2, wherein The RFID card includes an electronic tag chip and an electronic tag housing, and the electronic tag chip is arranged inside the electronic tag housing.

4. The FM module according to claim 3, wherein The structure of the electronic tag housing is an SD card structure.

5. The frequency modulation module according to claim 3, wherein The structure of the electronic tag housing is a TF card structure.

6. A wireless communication device, characterized in that, Including the frequency modulation module according to any one of claims 1 to 5.

7. The wireless communication device according to claim 6, characterized in that, The number of the frequency modulation modules is two, and the two frequency modulation modules are a first frequency modulation module and a second frequency modulation module respectively; The information carrier in the first frequency modulation module is a first information carrier, and the information carrier in the second frequency modulation module is a second information carrier; The first information carrier and the second information carrier respectively have preset frequency division information.

8. The wireless communication device according to claim 6, characterized in that, It further includes a housing and a circuit board; The circuit board is arranged inside the housing; The reference frequency element, the phase detector, the low-pass filter, the frequency divider, the register, and the voltage controlled oscillator are integrated on the circuit board; The housing is provided with a mounting position for fixing the information carrier, the information reading device is fixed on the housing, and the setting position of the information reading device corresponds to the mounting position, and the information carrier is fixed on the mounting position.

9. The wireless communication device according to claim 8, characterized in that, The mounting position is an SD card slot or a TF card slot.

Images