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A Bandwidth Mismatch Optimization Method for Multi-channel Time-Interleaved Analog-to-Digital Converters

An analog-to-digital converter and time interleaving technology, applied in the field of microelectronics, can solve problems such as bandwidth mismatch and affecting the dynamic performance of analog-to-digital converters, and achieve the effect of dynamic linear performance optimization

Active Publication Date: 2020-03-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Theoretically, the more channels the time-interleaved A / D converter has, the faster it can work; however, there are non-ideal factors such as bandwidth mismatch among sub-A / D converters of each channel, which seriously affects the dynamics of the entire A / D converter. performance

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  • A Bandwidth Mismatch Optimization Method for Multi-channel Time-Interleaved Analog-to-Digital Converters
  • A Bandwidth Mismatch Optimization Method for Multi-channel Time-Interleaved Analog-to-Digital Converters
  • A Bandwidth Mismatch Optimization Method for Multi-channel Time-Interleaved Analog-to-Digital Converters

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Embodiment Construction

[0035] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing and embodiment:

[0036] In order to better illustrate and understand the idea of ​​the present invention, this embodiment takes 16-channel TIADC as an example, such as Figure 4 As shown, the transmission bandwidth between the signal and each sub-channel is different. This set of bandwidth information indicates the mismatch of the signal on the transmission path. The bandwidth information vector of each channel signal transmission is as follows:

[0037] W 16 =(w 0 ,w 1 ,w 2 ,...w 14 ,w 15 )

[0038] The order of the above bandwidth values ​​in the vector is the order of the system sampling clock (working timing), such as image 3 The clock sequence represented by the solid line in the center shows that it is given to each channel in sequence. This situation will cause the stray energy at certain frequency points to accumulate and deteriorate the d...

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Abstract

The invention belongs to the technical field of microelectronics and provides a multi-channel time-interleaved analog-to-digital converter bandwidth mismatch optimization method; first, the bandwidth parameters of the signal transmission paths of each sub-channel are extracted, and the bandwidth mismatch of each channel relative to the reference channel is calculated. Dosing, form a vector as the initial bandwidth mismatch vector, bring it into the objective function, and calculate the initial solution of the objective function; then randomly exchange the elements in the bandwidth mismatch vector to generate a new bandwidth mismatch vector, bring it into the objective function, and calculate Obtain the solution of the objective function, and use the energy state minimum algorithm to update the minimum solution of the objective function until the number of updates of the minimum solution of the objective function in the energy state minimum algorithm reaches the preset number of times, and output the minimum solution of the objective function. The invention can realize the optimization of the dynamic linear performance SFDR of the multi-channel time-interleaved analog-to-digital converter without affecting other performances of the device and without increasing circuit overhead.

Description

technical field [0001] The invention belongs to the field of microelectronic technology, relates to a multi-channel time-interleaved analog-to-digital converter in the microelectronic technology, in particular to a bandwidth mismatch optimization method of the multi-channel time-interleaved analog-to-digital converter. Background technique [0002] With the reduction of process feature size, the working speed of digital integrated circuits has been greatly improved, making the analog-to-digital converters with ordinary structures unable to meet the speed requirements of digital signal processing, which also makes more and more researchers pay attention to how to improve the analog-to-digital converter. The working speed of the converter. [0003] In order to improve the working speed of traditional analog-to-digital converters, a structure in which multiple analog-to-digital converters work in parallel is proposed, that is, Time-interleaved ADC (TIADC), the analog-to-digital...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/10
CPCH03M1/1009
Inventor 李靖邓健罗建宁宁
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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