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Signal generation circuit, frequency measurement device including the signal generation circuit, and signal generation method

A signal generation circuit and frequency measurement technology, which is applied in the direction of frequency measurement device, conversion of frequency to pulse sequence, and use of material absorption weighing, etc., can solve the problems of not being applicable to multiple sensor sensor arrays and circuit scale enlargement, and achieve Effect of suppression of noise level and improvement of frequency measurement resolution

Inactive Publication Date: 2011-04-27
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of countdown system counters can make up for the above defects, but it is not suitable for sensor arrays with multiple sensors due to the large circuit size of each counter

Method used

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  • Signal generation circuit, frequency measurement device including the signal generation circuit, and signal generation method
  • Signal generation circuit, frequency measurement device including the signal generation circuit, and signal generation method
  • Signal generation circuit, frequency measurement device including the signal generation circuit, and signal generation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Exemplary structure of frequency measurement device

[0064] (2) Exemplary Structure of Variable Ratio Frequency Converter

[0065] (3) Exemplary work of variable ratio frequency converter

[0066] (4) Exemplary work of frequency measurement device

Embodiment 2

[0068] (1) Exemplary structure of frequency measurement device

[0069] (2) Exemplary Structure of Variable Ratio Frequency Converter

[0070] (3) Exemplary work of variable ratio frequency converter

[0071] 6 Conclusion

[0072] 7. Supplement

[0073] 1. Definition

[0074] First, terms used in this specification are defined as follows.

[0075] "○○ part" and "○○ circuit" (○○ can be any word) respectively include electrical parts and electrical circuits without any special restrictions, and may also include physical devices that realize the functions of circuits or parts or software-implemented functional devices. Moreover, the functions of one circuit or one part may each be realized by two or more physical devices or functional devices, or the functions of two or more circuits or parts may be realized by one physical device or one functional device.

[0076] 2. Outline of frequency measurement device using short gate time counting method

[0077] figure 1 is a diag...

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Abstract

A signal generation circuit includes: a first signal source that generates a first signal; and a variable rate frequency divider section that generates a variable rate frequency-divided signal in which a first frequency-divided signal obtained by frequency-dividing the first signal by a first frequency dividing ratio and a second frequency-divided signal obtained by frequency-dividing the first signal by a second frequency dividing ratio temporally alternately appear in a specified mixing ratio.

Description

[0001] The entire disclosure of Japanese Patent Application No. 2009-234514 filed on October 8, 2009 is hereby incorporated by reference. technical field [0002] The present invention relates to frequency measurement, in particular to a device capable of detecting small changes in frequency, as well as a signal generating circuit and a signal generating method that can be used in the device. Background technique [0003] As frequency measurement systems, direct counting systems and reciprocal systems are known. According to the direct counting system, pulses passing within a predetermined gate time are counted (for example, see Japanese Laid-Open Patent Application No. JP-A-2001-119291). According to the reciprocal system, the pulse period is accurately measured, and the frequency is obtained from the reciprocal of its time (for example, see Japanese Laid-Open Patent Application No. JP-A-5-172861). Direct counting systems can be implemented with relatively small-scale circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/10G01N5/02
CPCG01R23/10
Inventor 轰原正义
Owner SEIKO EPSON CORP
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