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Multi-range high-accuracy constant current source

A constant current source, high-precision technology, applied in the field of constant current source, can solve problems such as difficult to improve resolution and high-precision measurement, and achieve the effect of improving anti-interference ability, low cost and stable performance

Inactive Publication Date: 2017-02-15
TIANJIN SHENGDAN ELECTRONICS TECH DEV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the wide output current range and high precision of the multi-range high-precision constant current source, the high-precision constant current source is more susceptible to the influence of ripple and noise in the circuit than the general constant current source circuit, making it difficult to increase it to 0.1 Nanoampere-level resolution cannot meet the needs of high-precision measurement

Method used

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Embodiment Construction

[0018] The present invention is further described below in conjunction with embodiment, but they are not any restriction to the present invention, unless otherwise specified, term used herein all has the implication that those skilled in the art conventionally understands, and device, material etc. used in the embodiment have no special Note that it is a commercially available product, that is, it can be obtained from commercial channels.

[0019] The invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0020] Multi-range high-precision constant current source, such as figure 1 , 2 As shown, including the chassis and the control circuit inside the chassis, there are digital ammeters, two precision current adjustment knobs, a set of range selection switches, and two constant current output terminals on the front panel of the chassis; the control circuit includes power conversion circuits, constant current source circuit,...

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Abstract

The invention relates to a multi-range high-accuracy constant current source, which comprises a chassis and a control circuit in the chassis, wherein a front panel is provided with a digital amperemeter, two accurate current regulation knobs, one group of range option switches and two constant current output terminals; the control circuit comprises a power conversion circuit, an accurate reference circuit and a constant current source circuit. The multi-range high-accuracy constant current source has the advantages of reasonability in design, high accuracy and stable performance and can be widely applied to various fields which need accurate measurement, the requirements of the design resolution ratio (which achieves 0.1nA level) of a high-accuracy constant current source circuit are met, and the output range of the constant current source is 0.1nA to 2A.

Description

technical field [0001] The invention belongs to the field of constant current sources, in particular to a multi-range high-precision constant current source. Background technique [0002] At present, the constant current source has a very wide range of applications in various electronic measurement circuits and sensor electronic circuits, and is a necessary test unit for LED new energy, new semiconductor materials, and scientific research. The multi-range high-precision constant current source is widely used in various intelligent instruments and advanced detection technologies. Due to the wide output current range and high precision of the multi-range high-precision constant current source, the high-precision constant current source is more susceptible to the influence of ripple and noise in the circuit than the general constant current source circuit, making it difficult to increase it to 0.1 Nanoampere-level resolution cannot meet the needs of high-precision measurement....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 苏丹
Owner TIANJIN SHENGDAN ELECTRONICS TECH DEV
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