High precision output single-chip microcomputer phase-locked loop rapid frequency source

A high-precision, phase-locked loop technology, applied in the field of electronics, can solve the problems of insufficient phase-locked loop fast frequency source related solutions, accuracy and product stability to be improved, etc., to achieve good product stability, good suppression, and output frequency. high effect

Inactive Publication Date: 2016-03-16
北京中科飞鸿科技股份有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0004] However, the traditional single-chip phase-locked loop fast frequency source relate...
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Method used

The reflow soldering mode used in the present invention and the mode of assembling all meet military product reliability requirement, and the reliability of device soldering is guaranteed by reflow soldering using high-stability tin paste, all must band antistatic measures of assembling assembly, in order to satisfy Grounding performance to prevent damage to the device.
[0031] Applying the method of the embodiment of the present invention, the phase-locked loop, single-chip microcomputer module, power ...
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Abstract

The invention discloses a high precision output single-chip microcomputer phase-locked loop rapid frequency source. The high precision output single-chip microcomputer phase-locked loop rapid frequency source is characterized by comprising a switch power source which is fixedly mounted on a phase-locked loop and a single-chip microcomputer and is used for supplying power for the phase-locked loop and the single-chip microcomputer, wherein the phase-locked loop and the single-chip microcomputer are substantially connected, the phase-locked loop comprises a phase discriminator, a loop filter, a voltage control oscillator VCO and an N frequency divider which are sequentially connected to form a loop. Precise output of radiofrequency signals is realized through the rapid frequency source controlled by the phase-locked loop, feedback signals are reliably transmitted through three buses, intelligent frequency locking for maintenance work is realized, and online work, high output frequency, good inhibition performance and good product stability are all realized.

Application Domain

Technology Topic

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  • High precision output single-chip microcomputer phase-locked loop rapid frequency source
  • High precision output single-chip microcomputer phase-locked loop rapid frequency source

Examples

  • Experimental program(1)

Example Embodiment

[0016] The following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0017] Such as figure 1 As shown, a high-precision output single-chip phase-locked loop fast frequency source provided by an embodiment of the present invention mainly includes: fixedly installed on the phase-locked loop and the single-chip module that are basically connected to each other, and the phase-locked loop And the switching power supply supplied by the SCM module.
[0018] Specifically, the phase-locked loop can be fixed to the base plate with M12 screws; the one-chip computer module is fixed to the base plate with M10 screws; the signal input and signal output are connected to the phase-locked loop with a coaxial cable, and the signal input Use SMA head with signal output connector.
[0019] During the patch installation, according to the needs of the actual application process, the phase-locked loop can be assembled first, and the single-chip module is also assembled first, or both are assembled at the same time, and the patch is assembled by reflow soldering. , Its function is to make the module placement process beautiful, high stability, save time and facilitate later production.
[0020] During the installation of the phase-locked loop and the SCM module, a Phillips screwdriver, M2.5, M10, and M12 screws, coaxial cables and SMA connectors are used.
[0021] Based on the realization of the single-chip phase-locked loop control method, the fast frequency source has a better integration level and the integration of the entire phase-locked loop link, so that the highly integrated link reduces the volume of the original discrete device and ensures reliability.
[0022] Exemplarily, the phase-locked loop may adopt a 6*6 WQFN package, and the single-chip microcomputer module adopts an SOIC package.
[0023] Further, such as figure 2 As shown, the phase-locked loop includes: a phase detector, a loop filter, a voltage controlled oscillator VCO, and an N frequency divider that are connected in sequence and form a loop.
[0024] It should be noted that the voltage-controlled oscillator VCO should be far away from the power supply during layout, to prevent the harmonic modulation of the power supply from being stringed into the radio frequency through the voltage-controlled oscillator VCO. Before putting the phase-locked loop into the reflow soldering, you should wear an anti-static wristband and anti-static clothing to prevent static electricity from damaging the chip. The maximum temperature of the phase-locked loop is 260 degrees Celsius. If it exceeds, it is impossible to guarantee the normal operation of the chip. .
[0025] The above-mentioned components in the phase-locked loop are connected to form a frequency synthesizer to work with the SCM module.
[0026] Further, the single-chip microcomputer module includes: a single-chip microcomputer chip, and keys and an LED screen respectively connected to the single-chip microcomputer chip.
[0027] The single-chip microcomputer chip can be an 8-bit single-chip microcomputer. You should also wear an anti-static wristband and anti-static clothing when using the chip to prevent static electricity from damaging the chip. The maximum temperature of the single-chip microcomputer module is 150 degrees Celsius. Can it work? The LED screen needs to be manually patched and soldered on the board of the single-chip microcomputer module. Be careful not to install it in the wrong direction, otherwise it will burn the screen. The buttons also need to be manually patched and soldered. Insert the button in a good position. The embodiment of the present invention can use four pins Touch the button, fix the button pin and weld it.
[0028] Further, the phase-locked loop converts the radio frequency signal into a voltage and transmits it to the single-chip microcomputer module through three buses.
[0029] Further, the phase locked loop further includes: a radio frequency signal connector, a protective housing, a power interface, and a module circuit board.
[0030] By applying the present invention, the overall size of the fast frequency source is greatly reduced, and its performance is also greatly improved. For example, the user does not need to design a frequency synthesizer of a peripheral circuit independently and manually modify the frequency setting value. Solve the problem of manually changing the frequency and frequency accuracy in routine.
[0031] Applying the method of the embodiment of the present invention to integrate the phase-locked loop, single-chip module, power supply, etc., can greatly reduce the total volume before integration. In the present invention, the phase-locked loop and the single-chip microcomputer are connected and fixed on the base plate with a coaxial connection line, and a switch voltage stabilized power supply is added to the shell of the finished size. There are LED display screen and manual reset adjustment buttons on the shell, as well as power socket and power switch.
[0032] Both the reflow soldering method and the assembly method used in the present invention meet the reliability requirements of military products. The reflow soldering uses high-stability solder paste to ensure the reliability of device soldering. The assembly components must be equipped with anti-static measures to meet the grounding performance. Prevent damage to the device.
[0033] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or changes within the technical scope disclosed in the present invention. All replacements shall be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
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