Device and method for performing nolinear numerical value conversion by means of piecewise linearity

A digital converter, numerical technology, applied in the direction of analog-to-digital conversion, analog-to-digital converter, code conversion, etc.

Active Publication Date: 2013-05-01
MICREL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, conversions between numeric values ​​with arbitrary units to numeric values ​​with desired real-world units may involve non-linear relationships

Method used

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  • Device and method for performing nolinear numerical value conversion by means of piecewise linearity
  • Device and method for performing nolinear numerical value conversion by means of piecewise linearity
  • Device and method for performing nolinear numerical value conversion by means of piecewise linearity

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Embodiment Construction

[0023] In accordance with the principles of the invention, a data processing arrangement uses variable range coefficients to perform post-conversion processing on N-bit digital input values ​​produced by an analog-to-digital converter. Use variable range factors to perform numeric conversions of numeric values ​​with arbitrary units to numeric values ​​with natural units, where the natural units and arbitrary units have a non-linear relationship. Variable range coefficients allow nonlinear relationships to be more closely approximated to improve the accuracy of the conversion. More specifically, the range of digital input values ​​is divided into unequal regions, where each region is associated with a corresponding set of conversion factors. The size of the region is chosen to achieve a close piecewise linear approximation of a non-linear transformation relationship, such as a logarithmic relationship.

[0024] In one embodiment, the coefficients are stored in a lookup table ...

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Abstract

A device for processing a digital input value includes a first memory portion having stored thereon Q delimiter values where the Q delimiter values divide the range of the N-bit digital input value into Q+1 regions and at least a first region and a second region are of unequal sizes, a second memory portion has stored thereon a look-up table storing Q+1 sets of coefficients for performing numerical value conversion of the digital input value to a digital output value in a second, natural unit, and an arithmetic logic performing numerical value conversion using the N-bit digital input value and the selected coefficient pair. The N-bit digital input value is compared with the Q delimiter values to determine a respective one of the Q+1 regions in which the N-bit digital input value lies. The look-up table is indexed according to the respective region to provide the selected coefficient pair.

Description

[0001] Cross References to Related Applications [0002] This application is related to Peter Chambers and Joseph James Judkins III, entitled "Numerical Value Conversion Using A Look-Up Table for Coefficient Storage Table For Coefficient Storage)" co-pending and commonly assigned U.S. Patent Application No. 10 / 759,786. [0003] This application is also related to Peter Chambers and Joseph James Judkins III, entitled "Numerical Operations Using Saturation-Limited Arithmetic Logic Units Supporting Variable-Resolution Operands." Related to co-pending and commonly assigned US Patent Application No. 10 / 759,988, "Numerical Value Conversion Using A Saturation Limited Arithmetic Logic Unit Supporting Variable Resolution Operands". technical field [0004] The present invention relates to an apparatus for processing numerical values ​​and performing numerical conversions of said numerical values ​​from one unit system to another, usually natural units, and in particular to a data p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
CPCH03M1/1235H03M7/50
Inventor 彼得·钱伯斯
Owner MICREL
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