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Self-calibration current source system

A self-calibration, current source technology, used in control/regulation systems, regulating electrical variables, instruments, etc., to solve problems such as performance degradation

Inactive Publication Date: 2015-04-01
芯锋宽泰科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, the analog core modules of high-speed, high-precision analog-to-digital converters that apply this current source, such as sample-and-hold circuits, will face severe performance degradation

Method used

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Embodiment Construction

[0017] Now further illustrate the present invention in conjunction with accompanying drawing. Those skilled in the art can understand that the following is a non-restrictive description of the gist of the present invention in conjunction with specific embodiments, the scope of the present invention is determined by the appended claims, and any modifications and changes that do not depart from the spirit of the present invention should be covered by the claims of the present invention.

[0018] The focus of the present invention is to use the existing output terminal resistance of the chip as a reference resistance, and set a self-calibration resistance array inside the current source, so that the internal total resistance of the current source gradually approaches the reference resistance.

[0019] figure 2 is a schematic structural diagram of a self-calibrating current source system according to an embodiment of the present invention. As an example, this article uses the a...

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Abstract

The invention provides a self-calibration current source system which comprises a current source and further comprises a self-calibration resistance array, a comparator and a control module. The self-calibration resistance array is arranged to be connected with an interior resistance array of the current source, the comparator compares voltage of the self-calibration resistance array and voltage of an output terminal resistor of a chip, and the control module receives a comparing result of the comparator and outputs a control signal to control the self-calibration resistance array and the interior resistance array which is connected with the self-calibration resistance array. The self-calibration current source system can conduct automatically adjusting so as to enable resistance of the interior resistance array to be matched with resistance of the output terminal resistor.

Description

technical field [0001] The present invention relates to the technology related to the current source, and more specifically, relates to the related design of the reference resistance of the current source. Background technique [0002] The development of the integrated circuit industry satisfies Moore's Law, that is, the process size decreases at a rate of 30% per generation, the density of integrated circuits increases at a rate of 2 times, and the steady growth of transistor performance is guaranteed. However, shrinking process dimensions have brought greater process fluctuations, which are mainly due to the manufacturing process. [0003] figure 1 It is a conventional high-precision current source, which is used, for example, in a low-voltage differential signal digital output analog-to-digital conversion (ADC) chip. In the conventional current source shown, V GB is the output voltage of the internal bandgap circuit of the ADC chip, R external 12 is a high-precision r...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
Inventor 吴柯刘松杨飞琴
Owner 芯锋宽泰科技(北京)有限公司
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