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Hardware circuit based timestamp implementation method

A hardware circuit and time stamping technology, applied in the direction of generating/distributing signals, etc., can solve the problems of high requirements for designers, long time-consuming, complicated debugging, etc., and achieve the effect of reducing workload, saving cost, and reducing complexity

Active Publication Date: 2015-01-28
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme has high precision, and the time stamp precision can reach nanosecond level, but the debugging is more complicated, and the requirements for designers are high. It takes a long time and the cost is high before the phase-locked loop reaches a stable working state, which has certain limitations.

Method used

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  • Hardware circuit based timestamp implementation method
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Embodiment Construction

[0035] Attached below figure 1 And attached figure 2 The invention is illustrated by way of example.

[0036] Such as figure 1 As shown, a schematic diagram of a time stamp implementation method based on a hardware circuit of the present invention,

[0037] It has the following hardware circuits: GPS module, frequency and phase detector, digital loop filter, direct digital frequency synthesizer, digital to analog converter, feedback frequency divider, clock distributor, data acquisition processor and central processing unit;

[0038] The GPS module generates a second pulse signal to the frequency and phase detector, and the direct digital frequency synthesizer generates a feedback frequency division signal to the frequency and phase detector through the feedback frequency divider;

[0039] The frequency and phase detector, digital loop filter, direct digital frequency synthesizer, digital-to-analog converter, clock distributor and data acquisition processor are sequentiall...

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Abstract

The invention relates to a hardware circuit based timestamp implementation method, and belongs to the technical field of testing. A phase-locked loop circuit formed by digital phase-locked loop chips is used to replace the original digital phase-locked loop circuit formed by a field programmable gate array or complex programmable logic device, a high-precision voltage-controlled crystal oscillator and a high-precision digital to analog converter chip. The generated clock signal is supplied to a data acquisition module to be used as a system clock, the exact timing is carried out inside the data acquisition module, and a timestamp is stamped on the acquired and processed data. According to the hardware circuit based timestamp implementation method provided by the invention, the circuit is simple, the cost is reduced, the complexity of the system is effectively reduced, the high precision of the timestamp is ensured, the workload of research personnel is reduced, and the scalability and portability are better.

Description

technical field [0001] The invention relates to a method for realizing a time stamp, in particular to a method for realizing a time stamp based on a hardware circuit. Background technique [0002] In an increasingly complex data environment, the collected data has accurate time stamp information, which is of great significance for both spectrum monitoring and real-time data analysis. For the timestamp function, it is mainly divided into two categories: software timestamp function and hardware timestamp function. The software timestamp function does not require additional hardware support and is simple to implement. not tall. [0003] In order to meet the requirements of high-precision time stamping, the realization method of hardware time stamping is usually selected. In the hardware time stamp function, how to obtain high-precision time information is the key technology. The accuracy of GPS timing is high, but the time information of GPS can only be used directly to obta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/10G06F1/12
CPCG06F1/10G06F1/12
Inventor 李树芳孙发力杨青裴广超
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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