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Digital-to-analog converter with delay skew detection and calibration

A digital-to-analog converter and delay deviation technology, applied in the field of digital-to-analog converters, can solve the problems that the signal-to-noise ratio will not be improved and limit the application field, and achieve the effects of easy circuit implementation, high DAC sampling rate, and convenient calibration

Active Publication Date: 2017-09-08
迅芯微电子(苏州)股份有限公司
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AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the output signal can only be a return-to-zero code, which limits the application field; secondly, the essence of this method is to convert harmonic distortion into noise, and the signal-to-noise ratio will not be improved

Method used

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  • Digital-to-analog converter with delay skew detection and calibration
  • Digital-to-analog converter with delay skew detection and calibration
  • Digital-to-analog converter with delay skew detection and calibration

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Embodiment Construction

[0028] The invention adopts the way of feedback adjustment and adds one redundant path, thereby realizing the delay deviation detection and calibration of the digital-to-analog converter.

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0030] In an exemplary embodiment of the present invention, a digital-to-analog converter with delay skew detection and calibration functions is provided. Please refer to figure 1 , the digital-to-analog converter with delay deviation detection and calibration functions in this embodiment includes:

[0031] A switch matrix (MUX Array) 4, including: N+1 input ports and N+1 output ports, which can connect one of the input ports with one of the output ports under the control of the strobe signal, N≥1;

[0032] The path module includes ...

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PUM

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Abstract

The invention provides a digital analog converter with delay deviation detection and calibration functions. The digital analog converter with the delay deviation detection and calibration functions is added with a redundant access with structure the same as a normal data access, and in calibration of a to-be-calibrated access, the redundant access is used for processing a signal flowing through the to-be-calibrated access, so that normal operation of the digital analog converter does not need to be interrupted, and calibration of a digital analog converter access is greatly facilitated; besides, the digital analog converter adopts a feedback regulation manner, has low requirement on linearity of a delay deviation detection circuit, is easy to realize and also can calibrate delay deviation change caused by temperature drift or working environmental change and delay deviation caused by inconsistency of lengths of interconnected wires, thereby having strong practical value and popularization and application prospects.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a digital-to-analog converter with delay deviation detection and calibration functions. Background technique [0002] A digital-to-analog converter (DAC) is a circuit that converts digital signals into analog signals. In communication system applications, adopting high-speed, high-performance DAC chips not only greatly simplifies the system structure, but also improves the flexibility and portability of system design. It is for this reason that in many fields, high-speed, high-performance DAC chips are gradually replacing traditional analog circuits and becoming a new research hotspot in system solutions. These application fields include broadband wireless communication, cable broadband data service, optical fiber communication, etc. In the above application fields, the performance of the high-speed DAC chip, especially the dynamic performance, is the key factor to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/10
Inventor 周磊吴旦昱黄银坤武锦金智刘新宇
Owner 迅芯微电子(苏州)股份有限公司
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