Linear wide-range numerical control oscillator applied to FPGA

A digitally controlled oscillator, wide-range technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of limiting the range and occasions of frequency synthesizers, and achieve the effect of wide frequency adjustment range and good linearity

Active Publication Date: 2014-07-02
BEIJING MXTRONICS CORP +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional oscillators can only be adjusted around a specific frequency, which limits the range and occasions that frequency synthesizers can be applied

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
  • Linear wide-range numerical control oscillator applied to FPGA
  • Linear wide-range numerical control oscillator applied to FPGA
  • Linear wide-range numerical control oscillator applied to FPGA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The DCO of the present invention introduces a special frequency selection control signal, uses the configuration code of the FPGA to control, and realizes the output of different frequencies by changing the control word of the DCO.

[0029] A kind of linear wide-range numerical control oscillator circuit applied to FPGA provided by the present invention is such as figure 2 shown. when using figure 2 When using a DCO, according to the configuration register information, the output frequency of the DCO can be adjusted in a series of intervals. The output frequency range is the sum of all intervals. The final oscillator can be adjusted linearly in a wide interval. .

[0030] Such as figure 2 As shown, the DCO of the present invention includes a buffer 210, a multiplexer 220, an SRAM 230, and at least two tri-state inverter chains, and the first tri-state inverter chain includes tri-state inverters 201, 202, 203, 204 , 205 ... the second tri-state inverter chain incl...

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

Provided is a linear wide-range numerical control oscillator applied to an FPGA. The kernel portion of the numerical control oscillator is an annular oscillator body. Output frequency of the oscillator body can be selected according to a frequency selection control word. By means of the configurable characteristic of the FPGA, center output frequency of the numerical control oscillator can be flexibly changed, and accordingly the output frequency of the numerical control oscillator can be continuously and linearly adjusted in a wide range.

Description

technical field [0001] The invention relates to a numerically controlled oscillator, in particular to a numerically controlled oscillator with a wide frequency range applied in FPGA. Background technique [0002] Digitally controlled oscillator (hereinafter referred to as DCO) is essentially an oscillator. The oscillation frequency is controlled by the frequency selection control word. The main difference between DCO and other oscillators is the use of digital control codes to control the output frequency. This feature makes DCO widely used in digital frequency synthesizer. [0003] A typical ring oscillator usually uses an odd number of identical inverters, figure 1 is a typical structure diagram of a three-stage ring oscillator. The inverter in the oscillator is used to provide a fixed delay. The oscillation frequency of the oscillator is given by formula (1). [0004] f osc = 1 2...

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 Applications(China)
IPC IPC(8): H03L7/099
Inventor 王浩弛李智陈雷李学武张彦龙文治平赵元富林彦君邓先坤郑咸剑
Owner BEIJING MXTRONICS CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap