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Parasitic capacitance digital compensation method and device

A parasitic capacitance, digital compensation technology, applied in physical parameter compensation/prevention, electrical components, analog/digital conversion, etc., can solve the problem of parasitic capacitance affecting analog-to-digital conversion accuracy, and achieve the effect of improving analog-to-digital conversion accuracy

Active Publication Date: 2021-08-10
ALTO BEAM (CHINA) INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a parasitic capacitance digital compensation method and device to solve the problem that parasitic capacitance affects the accuracy of analog-to-digital conversion

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Embodiment Construction

[0024] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0026] It should be noted that the terms "first" and "second" in ...

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Abstract

The invention discloses a parasitic capacitance digital compensation method and device. The method includes: obtaining a digital codeword through analog-to-digital conversion, wherein the digital codeword includes a symbol bit codeword, an L-bit high-end codeword and an L-bit low-end codeword, and the L-bit high-end codeword is formed by L high-end capacitors The converted codeword, the L-bit low-end codeword is the codeword obtained by converting the capacitance of L low-end bits; the L-bit low-end codeword is compensated to obtain the compensated low-end codeword; the compensated The low-end codeword is combined with the symbol bit codeword and the high-end codeword to obtain the intermediate codeword; the intermediate codeword is compensated to obtain the compensated full codeword. Through the present invention, the effect of improving the precision of analog-to-digital conversion is achieved.

Description

technical field [0001] The present invention relates to the technical field of analog-to-digital conversion, in particular to a parasitic capacitance digital compensation method and device. Background technique [0002] In the wave of global digital information, as a bridge connecting the objective analog world and digital signals, the analog-to-digital converter plays an important role in the integrated circuit and information industry, and it is developing rapidly. The charge redistribution successive approximation analog-to-digital converter (SAR ADC) has been widely used in the fields of consumer electronics and medical equipment due to its characteristics of moderate speed, low power consumption and low cost. Usually a SAR ADC consists of a digital-to-analog converter (DAC), a comparator, digital comparison and control logic, and other analog circuits. Among them, the number of capacitors in the binary capacitor array of the DAC determines the conversion accuracy of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/06
CPCH03M1/0617
Inventor 凡明清
Owner ALTO BEAM (CHINA) INC