Assembly line A/D converter dynamic compensation device based on true random number sequence

A technology of analog-to-digital converter and digital-to-analog converter, applied in the direction of analog/digital conversion, physical parameter compensation/prevention, code conversion, etc., can solve problems such as comparator offset and capacitor mismatch, and achieve reduction of capacitor mismatch, The effect of reducing comparator offset and uniform distribution
CN106209099AActive Publication Date: 2016-12-07NO 24 RES INST OF CETC
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
NO 24 RES INST OF CETC
Publication Date
2016-12-07

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Abstract

The invention provides an assembly line A / D converter dynamic compensation device based on a true random number sequence. The device comprises a sub-A / D converter, a sub-D / A converter, a true random number generation circuit and a coding circuit, wherein the true random number generation circuit is used for generating the true random number sequence, and providing the true random number sequence for the sub-A / D converter to control opening and closing of a switch corresponding to a reference voltage input end of a comparator in the sub-A / D converter; the sub-A / D converter is used for providing an output digital signal for the coding circuit, and the coding circuit is used for generating a coding signal according to the digital signal and providing the coding signal for the sub-D / A converter to control the opening and closing of a switch in the sub-D / A converter. According to the device of the invention, the problem that in the sub-A / D converter, the comparator is maladjusted and capacitance in the sub-D / A converter is mismatched can be solved.
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Description

technical field

[0001] The invention belongs to the field of integrated circuit design, and in particular relates to a dynamic compensation device for a pipeline analog-to-digital converter based on a true random number sequence. Background technique

[0002] Pipeline analog-to-digital converters are widely used in radar, medical equipment, communication equipment and other fields, but the performance of the entire system is limited due to speed and accuracy. The main reasons are the charge injection effect of the switch, clock feedthrough effect, capacitance loss In order to improve the speed and accuracy of pipeline analog-to-digital converters, the commonly used compensation calibration methods include analog calibration methods and digital calibration methods. The analog calibration methods mainly include capacitance error averaging. technology, trim capacitor technology, sub-DAC auxiliary calibration technology, etc. Digital calibration methods are divided into foregro...

Claims

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