Invention Grant
US09094042B2 DAC current source matrix patterns with gradient error cancellation
有权
DAC电流源矩阵模式与梯度误差消除
- Patent Title: DAC current source matrix patterns with gradient error cancellation
- Patent Title (中): DAC电流源矩阵模式与梯度误差消除
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Application No.: US13963788Application Date: 2013-08-09
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Publication No.: US09094042B2Publication Date: 2015-07-28
- Inventor: Péter Onódy , Abdulkerim L. Coban
- Applicant: Silicon Laboratories Inc.
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Abel Law Group, LLP
- Main IPC: H03M1/66
- IPC: H03M1/66

Abstract:
First order gradient errors are canceled with no current source splitting by placing consecutive current sources symmetrically around the center of the array. Consecutive elements that correspond to small input amplitudes (mid-scale codes) make a smaller spatial jump than those correspond to larger signal amplitudes. Both linear and second order gradients are reduced by splitting each current cell into two and placing sub-elements symmetrically with respect to the center of the array to address the linear gradient effect. To address second order gradients, current element placement follows a pattern such that consecutive element pairs are chosen with one of the pair being placed with respect to the zero error contour of the second order gradient so as to have a positive error and the second of the pair being placed so as to have a negative error resulting in reduced second order error accumulation.
Public/Granted literature
- US20150042498A1 DAC CURRENT SOURCE MATRIX PATTERNS WITH GRADIENT ERROR CANCELLATION Public/Granted day:2015-02-12
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