Multi-bit Resolution Sub-Pipeline Structure for Measuring Transition Curve Jump Height

Abstract

The present invention provides a multi-bit resolution sub-pipeline structure for measuring the jump height of transmission curves, including: a sub-analog-to-digital converter with a resolution of n bits, which is used to quantize input analog voltage signals and output digital voltage signals; A sub-digital-analog converter with a resolution of n bits is used to convert the digital voltage signal output by the sub-analog-to-digital converter into a corresponding analog voltage signal; a decoder with a resolution of n bits is used for n Bit binary input signal is decoded, and a switched capacitor amplifying unit is used to sample the input analog voltage signal and amplify the residual error when it is in normal mode; when it is in test mode, measure the transmission curve at each The jump height corresponding to the judgment level. The present invention can be used in 2 n The measurement of the height of the transmission curve is completed in one clock cycle, and the measurement speed is fast; the measurement result is sent to the back-end digital domain of the A / D converter for correction, which can improve the linearity of the A / D converter by 10-15dB.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a multi-bit resolution sub-pipeline structure for measuring the jump height of transmission curves, relates to a switched capacitor sub-pipeline structure, and can be directly applied to pipeline analog-to-digital converters. Background technique [0002] In recent years, pipeline A / D converters have been favored in applications such as high-performance video, medical imaging, wireless and wired communications, etc. The reason is that pipeline A / D converters can achieve higher sampling rates while also achieving Higher precision, all of these benefit from the pipeline technology adopted by the pipeline A / D converter. The digital output of the sub-pipeline is processed according to a certain algorithm to obtain the final encoded output. Among them, the functional units of each sub-pipeline of the pipeline A / D converter are as follows figure 1 As shown in (a), it main...

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a multi-bit resolution sub-pipeline structure for measuring the jump height of the transfer curve, which is used to solve the problem that the multi-bit resolution sub-pipeline structure in the prior art cannot measure the transfer curve. The problem with the jump height of the curve

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