Invention Grant
US08164495B2 Integrated non-linearity (INL) and differential non-linearity (DNL) correction techniques for digital-to-analog converters (DACS)
有权
用于数模转换器(DACS)的集成非线性(INL)和差分非线性(DNL)校正技术
- Patent Title: Integrated non-linearity (INL) and differential non-linearity (DNL) correction techniques for digital-to-analog converters (DACS)
- Patent Title (中): 用于数模转换器(DACS)的集成非线性(INL)和差分非线性(DNL)校正技术
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Application No.: US12877904Application Date: 2010-09-08
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Publication No.: US08164495B2Publication Date: 2012-04-24
- Inventor: Iskender Agi
- Applicant: Iskender Agi
- Applicant Address: US CA Milpitas
- Assignee: Intersil Americas Inc.
- Current Assignee: Intersil Americas Inc.
- Current Assignee Address: US CA Milpitas
- Agency: Fliesler Meyer LLP
- Main IPC: H03M1/06
- IPC: H03M1/06

Abstract:
INL values are determined for a plurality of sub-segments of a DAC that is adapted to accept N bit digital input codes, and a first set of correction codes that can be used to reduce to a range of INL values (to thereby improve linearity of the DAC) are determined and stored. Additionally, DNL values are determined for the plurality of sub-segments for which INL values were determined, and a second set of correction codes that can be used to ensure that all values of DNL>−1 (to thereby ensure that the DAC is monotonic) are determined and stored. This can include using one or more extra bits of resolution to remap at least some of the 2^N possible digital input codes (that can be accepted by the DAC) to more than 2^N possible digital output codes, to ensure that all values of DNL>−1. Such stored first and second sets are thereafter used when performing digital to analog conversions.
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