Supercharge Your Innovation With Domain-Expert AI Agents!

Low spurious \ low phase noise frequency synthesizer

A frequency synthesizer, low phase noise technology, applied in the direction of automatic power control, electrical components, etc., can solve problems such as fractional spurs, and achieve the effects of low spurs, continuous phase, and fast switching speed

Active Publication Date: 2022-04-01
10TH RES INST OF CETC
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has a very fatal flaw in itself, that is, there are fractional spurs, so the frequency divider is the key point and difficulty in the design of the frequency synthesizer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low spurious \ low phase noise frequency synthesizer
  • Low spurious \ low phase noise frequency synthesizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] refer to figure 1 . The low spurious / low phase noise frequency synthesizer can be divided into two parts: the reference signal generating unit and the mixing phase locking unit, the mixing phase locking unit is connected to the DDS signal link of the reference signal generating unit, the harmonic generation link, It is composed of a phase-locked mixing link and an amplification and filtering link connected in series in series with the DDS signal link, wherein the harmonic generation link is connected in parallel to the phase-locked mixing link. The phase-locked mixing link contains loops, and the mixing phase-locked link contains figure 2 The phase detector shown is a loop composed of a voltage-controlled oscillator VCO. The reference signal generation unit takes the externally received 10MHz reference input signal frequency as a unified reference frequency, uses the DDS output signal as the reference signal of the phase-locked loop PLL through the DDS signal link, a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a frequency synthesizer with low stray / low phase noise, aiming to provide a frequency synthesizer with fine stepping, low stray, low phase noise, stable and reliable operation, and fast frequency switching speed. The present invention is realized by following technical scheme: reference signal generating unit uses the reference input signal that the outside receives as unified reference frequency, and reference frequency uses the output signal of DDS as phase-locked loop (PLL) by direct digital frequency synthesizer (DDS) signal link The reference signal of PLL) controls the output frequency by changing the frequency control word of DDS. The signal output by DDS is multiplied twice and then sent to the mixing phase-locking unit and the local oscillator signal generated by the harmonic generation link for phase-locking mixing in the mixing phase-locking unit, and the phase-locking mixing signal passes through the amplification and filtering link , the desired local oscillator signal is obtained after being filtered by a band-pass filter.

Description

technical field [0001] The invention relates to a low phase noise and low spurious frequency synthesizer mainly used in radio frequency microwave circuits such as radar reconnaissance, aerospace measurement and control, and wireless communication, especially a low phase noise with an output frequency of 3950MHz-4150MHz and a step of 1kHz. Low spurious frequency synthesizer. Background technique [0002] Frequency synthesis technology is an important technology in electronic system design. Its indicators such as phase noise, output spurious, frequency conversion time and frequency resolution often directly determine the performance of the entire system. The spurious performance directly affects the dynamic range and detection capability of the receiving system. In the field of communication, a low spurious signal source is an important guarantee for reducing the bit error rate and improving system sensitivity. The fast switching time of the signal source can improve the spee...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/18H03L7/085H03L7/099
CPCH03L7/085H03L7/099H03L7/18H03L2207/12
Inventor 华林
Owner 10TH RES INST OF CETC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com