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An all digital wideband frequency synthesizer

A frequency synthesizer, all-digital technology, applied in the field of frequency synthesizers, can solve the problems of rigid circuit structure, insufficient scalability, insufficient flexibility, etc., to achieve rich functions and adaptability, flexible structure, and low complexity. Effect

Active Publication Date: 2018-12-28
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the device of this invention, the circuit structure is fixed and rigid, the flexibility is not enough, the scalability is not enough, and it cannot be adjusted according to different actual needs

Method used

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  • An all digital wideband frequency synthesizer
  • An all digital wideband frequency synthesizer
  • An all digital wideband frequency synthesizer

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Embodiment 1

[0028] Such as figure 1 Shows the circuit structure diagram of the frequency synthesizer of the present invention, specifically: digital frequency and phase detector, loop filter, digital voltage-controlled oscillator, digital frequency divider, loop parameter controller, phase / frequency decision device, programmable logic controller; the output of the digital frequency and phase detector is connected to the phase / frequency judger, and the phase / frequency judger is connected to the loop filter and the programmable logic controller respectively, and the loop filter is connected to the digital voltage The output of the voltage-controlled oscillator is connected with the frequency divider, and the output of the frequency divider is used as an input signal of the digital frequency and phase detector; at the same time, the digital programmable logic controller is connected with the loop parameter controller, and the loop The loop parameter controller is connected with the loop filt...

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Abstract

The invention provides a programmable logic controller in the circuit of the frequency synthesizer, which can adjust the parameters of the loop filter according to the actual input signal of the frequency synthesizer, thereby enriching the function and adaptive range of the traditional frequency synthesizer. Secondly, the invention also provides a phase / frequency decider for judging the phase andfrequency of the input signal, thereby avoiding arithmetic operation and code conversion, and effectively reducing the complexity and power consumption of the circuit.

Description

technical field [0001] The invention relates to a frequency synthesizer, in particular to an all-digital broadband frequency synthesizer. Background technique [0002] Bandwidth is the sign that ultra-wideband radar is different from narrow-band radar. Compared with narrow-band radar, ultra-wideband radar can provide more target information, and can also perform more effective target identification. With the advancement of radar signal processing technology, the bandwidth of video signals that can be processed is getting wider and wider, making the original operating frequency and bandwidth of radar frequency synthesizers unable to meet the technical requirements of ultra-wideband active phased array radar. [0003] Frequency synthesizer is a key device in modern communication system, radar and test equipment, which can provide high-precision and high-stability frequency. Since the concept of frequency synthesis was first proposed in the 1930s, three basic frequency synthes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/18
CPCH03L7/1803
Inventor 王锋刘鹏远柳鹏韩翠娥刘昉
Owner ARMY ENG UNIV OF PLA
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