High-resolution time interval measuring device with temperature compensation function

A time interval measurement and time interval technology, which is applied in the direction of electrical unknown time interval measurement, devices and instruments for measuring time interval, etc. Research and measurement accuracy has not reached the level of several picoseconds, etc., to achieve the effect of improving measurement accuracy

Active Publication Date: 2015-03-25
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0011] The specific circuit of the TAC converter is described in many documents, but it is more of a theoretical description. Since the previous time interval measurement accuracy did not reach the order of se

Method used

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  • High-resolution time interval measuring device with temperature compensation function
  • High-resolution time interval measuring device with temperature compensation function
  • High-resolution time interval measuring device with temperature compensation function

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0033] image 3It is a schematic diagram of a specific implementation of the time-amplitude converter in the high-resolution time interval measuring device with temperature compensation function of the present invention.

[0034] The input conditioning circuit and the FPGA in the high-resolution time interval measurement device with temperature compensation function of the present invention are all prior art, and will not be repeated here.

[0035] In this example, if image 3 As shown, the time-amplitude converter in the high-resolution time interval measurement device w...

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Abstract

The invention provides a high-resolution time interval measuring device with a temperature compensation function and aims to solve the problem that time interval measuring accuracy is affected by small errors caused by a constant-current source circuit. A first resistor and a second resistor are added at an output end of an operational amplifier in the constant-current source circuit, and resistance value of the second resistor is 1/N of that of an equivalent resistor of a first NPN triode. Equivalent noise current output by the operational amplifier is at a fixed value, so that noise equivalent current entering a base electrode of the first NPN triode is reduced to be 1/(N+1) of an original value through current dividing of the resistance value of the second resistor, the high-resolution time interval measuring device has the characteristic of low noise, and measuring accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of time interval measurement, and more specifically relates to a high-resolution time interval measurement device with a temperature compensation function. Background technique [0002] High-resolution time interval measurement technology is widely used in various scientific research and production fields such as electronic instruments, laser ranging, and physical experiments, and is the basic technology in these fields. Currently widely used time interval measurement methods mainly include direct counting method, analog interpolation method, digital vernier method, delay line method and time-amplitude conversion method. [0003] The direct counting method converts the measured signal into a gate signal, controls the high-speed circuit to count the high-speed clock, and obtains the time interval of the measured signal. The principle of this method is relatively simple, but to achieve picosecond-level accura...

Claims

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Application Information

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IPC IPC(8): G04F10/04
Inventor 邱渡裕吴佳瑜叶芃程孟曾浩谭峰杨扩军黄武煌魏骐郭连平
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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