Unlock instant, AI-driven research and patent intelligence for your innovation.

Frequency correction method and system

A technology of frequency correction and frequency, which is applied in the field of frequency correction methods and systems, can solve problems such as resolution reduction, gate time error, and increased test time, and achieve the effects of small circuit footprint and elimination of measurement errors

Inactive Publication Date: 2013-04-03
ASKEY TECH JIANGSU +1
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the number of cycles of the frequency signal within the gate time is usually not an integer value, this method is likely to cause errors at the beginning and end of the gate time, for example: counting half a cycle less or counting half a cycle more number etc.
Based on this, generally when performing frequency measurement, the gate time will be extended as much as possible to cover more cycles, thereby reducing the error, but this method will greatly increase the test time. If the number of measurement cycles is small , the resolution is also reduced by the short gate time

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
  • Frequency correction method and system
  • Frequency correction method and system
  • Frequency correction method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to fully understand the purpose, features and effects of the present invention, the present invention will be described in detail by the following specific embodiments and accompanying drawings, as follows:

[0041] Unless otherwise specified, the steps described in the specific embodiments of the frequency correction method of the present invention can be exchanged with each other instead of the order in which the steps are executed according to the order of description; in addition, the frequency correction system of the present invention The term 'connection' mentioned in the specific embodiments is not limited to direct connection, and other units can also be connected in the middle. Furthermore, the term 'first trigger state' and 'second trigger state' includes either one of the upper edge trigger state and the lower edge trigger state, and the first trigger state and the second trigger state are both Not mutually exclusive, that is, the first trigger sta...

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 correction method and system. The frequency correction method comprises the steps of: correcting a frequency signal generated by a frequency generating unit in equipment based on a preset frequency value; acquiring a cycle number of a clock pulse of the frequency signal by using a reference signal and a time pulse shade synchronous with the frequency signal; acquiring a frequency value of the frequency signal based on the cycle number; meanwhile, correcting the above frequency value by using a plurality of phase shift signals generated based on the reference signal; and further reducing an error range along with increase of the number of the phase shift signals to obtain an accurate frequency value of the frequency signal, so as to correct the frequency signal generated by the frequency generating unit.

Description

[0001] technical field [0002] The present invention relates to a frequency calibration method and system, and more particularly to a frequency calibration method and system capable of quickly and accurately obtaining accurate frequency values ​​for calibration. Background technique [0003] Many electronic devices have a frequency generating unit, which is used to provide an output of a frequency signal based on a predetermined frequency value. In order to determine the correctness of the frequency signal, an external frequency counter is traditionally used for verification. This frequency counter The instrument is a special calibration instrument. Compared with electronic equipment, it is usually bulky, so that the calibration work must be carried out on special occasions and time, and rapid calibration cannot be achieved. [0004] In addition, the measurement of the frequency signal in the frequency counter usually sets a gate time, uses the gate time to count the number...

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
IPC IPC(8): H03L7/06G01R23/10
Inventor 周明宏谢青峰
Owner ASKEY TECH JIANGSU