Unlock instant, AI-driven research and patent intelligence for your innovation.

Cubic spline interpolation DAC digital front-end system

A spline interpolation, digital front-end technology, applied in the field of cubic spline interpolation Sigma-DeltaDAC digital front-end system, achieves the effect of simple design, reduced area and power consumption, and small amount of computation

Active Publication Date: 2021-04-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the problem of Sigma-Delta DAC zero interpolation method, the present invention proposes a cubic spline interpolation Sigma-Delta DAC digital front-end system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cubic spline interpolation DAC digital front-end system
  • Cubic spline interpolation DAC digital front-end system
  • Cubic spline interpolation DAC digital front-end system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Such as figure 1As shown, the present invention proposes a cubic spline interpolation Sigma-Delta DAC digital front-end system, the system structure includes a data set division module, a cubic spline interpolator module and a Sigma-Delta modulator module. Among them, the function of the data set division module is to divide the input digital signal into data sets and input them to the cubic spline interpolator module; the function of the cubic spline interpolator module is to use the cubic spline interpolation method to calculate the cubic spline function, and then According to the calculated function, insert (R-1) (R represents the oversampling rate) data points between the adjacent sampling points of the data set to obtain the oversampled digital signal, so that the oversampled digital sig...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a cubic spline interpolation DAC digital front-end system, and relates to the field of digital-to-analog converters (DAC). The structure of the system comprises a data set division module, a cubic spline interpolator module and a Sigma-Delta modulator module. The system is simple in design, small in calculation amount and easy to implement in an FPGA or an ASIC. Moreover, an interpolation signal can be obtained by only needing a spline interpolator for three times to directly form a final oversampling signal, and a multi-stage high-order low-pass filter is not needed, so that the area and the power consumption of the Sigma-Delta DAC are reduced. Meanwhile, a cubic spline interpolation method is used for accurately predicting the change trend of a curve between every two adjacent points according to an overall sample signal, so that an oversampling signal subjected to cubic spline interpolation can reproduce a complete original signal.

Description

technical field [0001] The invention belongs to the field of digital-to-analog converters (DACs), in particular to a cubic spline interpolation Sigma-Delta DAC digital front-end system. Background technique [0002] A digital-to-analog converter (DAC) is a device that converts digital signals into analog signals, among which Sigma-DeltaDAC has an absolute advantage in the field of low speed and high precision. Sigma-Delta DAC (for its structure see figure 2 ) mainly includes interpolation filter, Sigma-Delta modulator and analog part. The interpolation filter interpolates the input digital signal to form an oversampled digital signal, and then outputs the filtered oversampled digital signal after filtering out the image frequency generated by the interpolation; the Sigma-Delta modulator quantizes the input oversampled digital signal, and at the same time utilizes the noise The shaping technology pushes the noise generated by the quantizer to the high frequency; the analog ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H03M3/00
CPCH03M3/508H03M3/32
Inventor 李荣宽朱国良
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA