Actively shielded high-value Hamon resistor

A technology of active shielding and resistors, applied in the field of electrical measurement, which can solve problems such as leakage current

Inactive Publication Date: 2010-11-03
中国航天科技集团公司第五研究院第五一四研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of leakage current in high-value Harmon resistors, the present invention provides a high-value Harmon resistor. Equipotential shielding is carried out on the board connection part to solve the above leakage current problem

Method used

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  • Actively shielded high-value Hamon resistor
  • Actively shielded high-value Hamon resistor
  • Actively shielded high-value Hamon resistor

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Embodiment Construction

[0021] figure 2 The principle of the present invention has been shown. The high-value Harmon resistor of the present invention includes pins connected to the working resistance on the circuit board. The working resistance itself has no contact with the circuit board except the pins. The working resistance is a high-value resistance (more than 1MΩ resistance), the number of working resistance is greater than 1. The two pins of the working resistor are respectively connected to one pin of the other two working resistors (except the first and last two working resistors) to form a series structure. when figure 2 A shown in 1 to A 6 The terminals (these terminals are also the pins of the working resistor) are connected together, and B 1 to B 5 The terminals (these terminals are also the pins of the working resistors) are connected together, and the working resistors form a parallel structure at this time. Due to the leakage current problem that is easy to exist in the high-...

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Abstract

The invention provides an actively shielded high-value Hamon resistor and aims to solve the problem of current leakage of a high-value Hamon resistor. The actively shielded high-value Hamon resistor comprises at least two high-value working resistors and a shielding structure made of a conductor material, wherein two pins of each working resistor are connected to a circuit board, and the shielding structure is a closed structure; the closed structure separates the connection part of the pins and the circuit board from other parts of the circuit board on the circuit board; protective resistors with the same nominal value as the working resistors are serially connected to the shielding structure surrounding the connection part of the two pins of one working resistor and the circuit board; a circuit consisting of the shielding structure and the protective resistors and a working circuit consisting of the working resistors have the same serial connection or parallel connection structure; and moreover, the actively shielded high-value Hamon resistor is also provided with an independent power supply which enables the shielding structure and the pins of the working resistors surrounded by the shielding structure to have the same electric potential. The high-value Hamon resistor can be applied to the field of circuit measurement.

Description

technical field [0001] The invention relates to electrical measurement technology, in particular to a Harmon resistor for measurement. Background technique [0002] Harmon resistors are a group of standard resistors with equivalent resistance working in series and parallel, and are mainly used in the field of precision DC resistance measurement. The specific principle is as follows: when n resistors R with the same nominal value (the same resistance value) are connected in parallel, the relative deviation (a) of the parallel resistance value to R / n is approximately equal to the relative deviation (b) of the series resistance value to nR, ( a-b) is the series-parallel difference. The degree of consistency of the n resistors is an important factor affecting the approximate degree of consistency of the relative deviation of the parallel resistance value and the relative deviation of the series resistance value. [0003] The degree of consistency of the resistance values ​​of ...

Claims

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Application Information

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IPC IPC(8): H01C13/02H01C1/06G01R1/20
Inventor 黄晓钉蔡建臻李继东
Owner 中国航天科技集团公司第五研究院第五一四研究所
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