A reconfigurable sigma-delta modulator

A technology of modulator and adder, which is applied in the field of electronic information, can solve the problems of digital correction circuit to reduce nonlinearity, etc., and achieve the effects of saving chip area, adjustable bandwidth, and low power consumption

Inactive Publication Date: 2016-10-19
HARBIN INST OF TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A one-bit quantizer has the advantages of simplicity and unconditional linearity, and a multi-bit quantizer greatly improves the signal-to-noise ratio by reducing quantization noise, but a multi-bit quantizer has the disadvantage of nonlinearity, and a digital correction circuit is required to reduce its nonlinearity

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
  • A reconfigurable sigma-delta modulator
  • A reconfigurable sigma-delta modulator
  • A reconfigurable sigma-delta modulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]A reconfigurable Sigma-Delta modulator, including a configurable loop filter 3, a multi-bit quantizer 4 and a digital-to-analog converter 5, the input signal Vin(t) is connected to a configurable loop filter, and the configurable loop The filter is connected to the input terminal of the multi-bit quantizer, the output terminal of the multi-bit quantizer is respectively connected to the output terminal y[n] of the modulator and the input terminal of the digital-to-analog converter, and the output terminal y(t) of the digital-to-analog converter is connected to Configurable loop filter.

[0026] The configurable loop filter includes a first second-order harmonic oscillator distributed output feedback structure 1, a second second-order harmonic oscillator distributed output feedback structure 2, a first configurable feed-forward input coefficient b0, a sixth The switch S6, the eighth switch S8, the ninth switch S9, the tenth switch S10, the fifth adder 14 and the first conf...

Embodiment 2

[0030] In the present invention, the reconfigurable modulator is essentially a Sigma-Delta modulator composed of a second-order harmonic oscillator feedback filter, a quantizer, and a digital-to-analog converter. coefficients and local feedback coefficients can be mapped to specific circuit modules; if the loop filter is a switched capacitor structure, these coefficients can be mapped to a switched capacitor array; if the loop filter is a transconductance capacitor or resistor capacitor structure, these coefficients Can be mapped as a capacitor or resistor array; local feedback coefficient g i (i=1, 2) is used to adjust the zero point position, optimize the noise in the baseband, and the feedback coefficient a i (i=0, 1, 2, 3, 4) is used to adjust the pole position, the gain coefficient k of the integrator i (i=1, 2, 3, 4) is used to adjust the output level of the integrator circuit so that it is in a reasonable output range and prevent the modulator from being overloaded; C...

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 reconfigurable Sigma-Delta modulator which comprises a configurable loop filter, a multi-digit quantizer and a digital analog converter. Input signals are connected with the configurable loop filter. The configurable loop filter is connected with the input end of the multi-digit quantizer. The output end of the modulator and the input end of the digital analog converter are respectively connected with the output end of the multi-digit quantizer. The output end of the digital analog converter is connected with the configurable loop filter. The modulator has the advantages that power consumption is small, bandwidth is tunable, and chip areas can be saved.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a reconfigurable Sigma-Delta modulator. Background technique [0002] When designing a wireless integrated transceiver circuit suitable for multi-mode and multi-frequency, it is inevitable to need a variety of high-precision analog-to-digital converters with different bandwidths. Due to the requirements of the accuracy and bandwidth of the analog-to-digital converter, it is often necessary to use multiple high-precision analog-to-digital converters with different bandwidths to meet the needs of multi-frequency and multi-mode wireless integrated terminals. This not only increases the design difficulty, but also increases power consumption and hardware costs. It has also increased exponentially. With the continuous advancement of CMOS technology, the level of integration directly affects the manufacturing cost, size and weight of final electronic products. Therefore...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H03M3/00
Inventor 刘晓为高志强尹亮
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap