Interstage gain error calibration method, device, equipment and medium
A gain error, calibration method technology, applied in analog/digital conversion calibration/test, code conversion, electrical components, etc., can solve problems such as large error and slow convergence, achieve smooth spectrum, speed up convergence, and reduce problem complexity. Effect
Active Publication Date: 2022-06-03
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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[0005] The purpose of the present invention is to provide a method, device, equipment and medium for inter-stage gain error calibration, which are used to solve the problems of large error and slow convergence in the existing inter-stage gain error calibration method
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[0043] In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and the order of the thresholds is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" are not necessarily different.
[0044] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiment or design herein described as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "e...
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The invention discloses an inter-stage gain error calibration method, device and equipment and a medium, relates to the technical field of analog-to-digital converters, and aims to solve the problem of inter-stage gain error calibration of a pipelined analog-to-digital converter. The method comprises the following steps of: injecting a pseudo-random noise sequence into one stage of sub digital-to-analog converter of the pipelined analog-to-digital converter to obtain a digital code of a post-stage analog-to-digital converter, injecting the pseudo-random noise sequence into the digital code to obtain post-stage digital output, and extracting an inter-stage gain coefficient according to a recursive least square method, and calibrating the inter-stage gain error according to the inter-stage gain coefficient. The interstage gain error calibration method provided by the invention is used for improving the convergence speed and tracking performance of interstage gain coefficient extraction of the pipelined analog-to-digital converter.
Description
technical field [0001] The present invention relates to the technical field of analog-to-digital converters, and in particular, to an inter-stage gain error calibration method, device, equipment and medium. Background technique [0002] The pipeline analog-to-digital converter has a trade-off between speed and accuracy, and can achieve relatively high sampling speed and relatively high sampling accuracy, so it has been widely used. The pipeline analog-to-digital converter is mainly composed of n-stage pipeline and the final delay encoding circuit. For each stage of the pipeline, it includes sub-analog-to-digital converters, sub-digital-to-analog converters, subtractors, and residual amplifiers, wherein the sub-digital-to-analog converters, subtractors and residual amplifiers are collectively called MDAC. [0003] The error of the pipeline ADC mainly comes from the MDAC. There are two specific reasons: the capacitance mismatch caused by the process accuracy and the limited g...
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IPC IPC(8): H03M1/10
CPCH03M1/1009
Inventor 贾涵博余江锋郭轩吴旦昱武锦刘新宇
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI