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Static charge source and method for calibrating same

A charge source, static technology, applied in the field of charge source, can solve the problem of the influence of the output charge, and achieve the effect of ensuring accurate output and stable output characteristics

Active Publication Date: 2015-03-25
BEIJING DONGFANG MEASUREMENT & TEST INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the problem that the output charge in the existing static charge source is affected by the output load and output voltage, the present invention provides a static charge source and its calibration method

Method used

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  • Static charge source and method for calibrating same
  • Static charge source and method for calibrating same

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Embodiment Construction

[0027] Below with the accompanying drawings ( Figure 3-Figure 5 ) to illustrate the present invention.

[0028] image 3 It is a schematic diagram of the circuit structure for implementing the static charge source of the present invention. Such as image 3 As shown, the static charge source 1 includes a DC voltage source Es, the high end of the DC voltage source Es is connected to the charge output high end 2 through the internal reference capacitor Cs, and the charge between the internal reference capacitor Cs and the charge output high end 2 The output node a is connected to the non-inverting end of the amplifying circuit 4, and the low end of the DC voltage source Es, the reverse end of the amplifying circuit 4 and the following voltage output end 5 are respectively connected to the low end node b of the DC voltage source, relative to the The charge output low end 3 of the charge output high end 2 is grounded. Figure 4 It is a schematic diagram of another circuit stru...

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Abstract

Disclosed are a static charge source and a method for calibrating the same. Influence of output load and output voltage on the quantity of charge outputted by the static charge source is quite low, and the static charge source is applicable to high-precision circuits, and comprises a direct-current voltage source. A high end of the direct-current voltage source is connected with a high charge output end by an internal reference capacitor. The static charge source is characterized in that a charge output node between the internal reference capacitor and the high charge output end is connected with an in-phase end of an amplifying circuit, a low end of the direct-current voltage source, a reverse end of the amplifying circuit and a follower voltage output end are respectively connected with a low end node of the direct-current voltage source, and a low charge output end corresponding to the high charge output end is grounded.

Description

technical field [0001] The invention relates to charge source technology, in particular to a static charge source and a calibration method thereof. The output charge of the static charge source is slightly affected by the output load and output voltage, and has a stable output characteristic. It can be called a "DC (or static) constant charge source" and can be applied to high-precision circuits. Background technique [0002] Static charge sources can be used to calibrate charge measuring instruments, charge amplifiers and signal conditioners, also known as charge calibrators, and their basic working principles are as follows figure 1 shown. figure 1 Among them, the static charge source 1 includes a DC voltage source Es, the high end of the DC voltage source Es is connected to the charge output high end 2 through the internal reference capacitor Cs, the low end of the DC voltage source Es is connected to the charge output low end 3, and the charge output high end The charg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07G01R35/00
Inventor 王斌延峰冯文武桑琳焦海妮
Owner BEIJING DONGFANG MEASUREMENT & TEST INST