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Digital-to-analog converter and method for implementing the same

A digital-to-analog conversion and digital-to-analog technology, used in digital-to-analog converters, analog-to-digital conversion, analog/digital conversion calibration/testing, etc. And other issues

Active Publication Date: 2022-05-06
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the DAC has always had the problem of current mismatch, which directly affects the accuracy of the DAC

Method used

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  • Digital-to-analog converter and method for implementing the same
  • Digital-to-analog converter and method for implementing the same
  • Digital-to-analog converter and method for implementing the same

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Embodiment Construction

[0011] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, the inventive concept may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application's concepts to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

[0012] It should be understood that although the terms first, second, third, etc. may be used herein to describe various components or signals, etc., these components or signals should not be limited by these terms. These terms are used to distinguish one component from another component, or one signal from another signal. In addition, as used herein, the term...

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Abstract

The present application discloses a digital-to-analog converter and an implementation method thereof. The digital-to-analog converter includes a digital-to-analog conversion circuit, a switch circuit and a control circuit. The digital-to-analog conversion circuit includes the most significant bit and correction digital-to-analog conversion circuit (MDAC and CDAC), and the switch circuit includes a current source circuit and a detection circuit. The MDAC, CDAC and current source circuit are coupled to the first and second output ends of the digital-to-analog conversion circuit. In the calibration mode, the current source circuit generates a current difference between the first and second output terminals, the detection circuit detects the current difference to generate a detection signal, and the control circuit outputs a control signal to the calibration digital-to-analog conversion circuit according to the detection signal to adjust Correcting the output currents of the digital-to-analog conversion circuit at the first output terminal and the second output terminal. In normal mode, the current source circuit acts as a dual DC current source.

Description

technical field [0001] The present application relates to a digital-to-analog converter, in particular to a digital-to-analog converter and a method for executing the digital-to-analog converter. Background technique [0002] Most electronic products include a digital-to-analog converter, especially in the field of wireless communication. However, the digital-to-analog converter has always had the problem of current mismatch, which directly affects the accuracy of the digital-to-analog converter. In order to overcome the current mismatch problem, many kinds of digital-to-analog converter correction techniques and correction circuits have been developed. Contents of the invention [0003] An embodiment of the present application provides a digital-to-analog converter having a first output terminal and a second output terminal. The digital-to-analog converter includes a digital-to-analog conversion circuit, a switch circuit and a control circuit. The digital-to-analog con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/10H03M1/66
CPCH03M1/1014H03M1/66
Inventor 杨智杰
Owner REALTEK SEMICON CORP