Invention Grant
- Patent Title: Embedded overload protection in delta-sigma analog-to-digital converters
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Application No.: US14477236Application Date: 2014-09-04
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Publication No.: US09912144B2Publication Date: 2018-03-06
- Inventor: Trevor Clifford Caldwell , Corey Petersen , David Nelson Alldred , Hajime Shibata
- Applicant: ANALOG DEVICES TECHNOLOGY
- Applicant Address: BM Hamilton
- Assignee: ANALOG DEVICES GLOBAL
- Current Assignee: ANALOG DEVICES GLOBAL
- Current Assignee Address: BM Hamilton
- Agency: Patent Capital Group
- Main IPC: H03M1/12
- IPC: H03M1/12 ; H02H7/12 ; H03M3/00

Abstract:
Delta-sigma modulators do not handle overload well, and often become unstable if the input goes beyond the full-scale range of the modulator. To provide overload protection, an improved technique embeds an overload detector in the delta sigma modulator. When an overload condition is detected, coefficient(s) of the delta sigma modulator is adjusted to accommodate for the overloaded input. The improved technique advantageously allows the delta sigma modulator to handle overload gracefully without reset, and offers greater dynamic range at reduced resolution. Furthermore, the coefficient(s) of the delta sigma modulator can be adjusted in such a way to ensure the noise transfer function is not affected.
Public/Granted literature
- US20160072275A1 EMBEDDED OVERLOAD PROTECTION IN DELTA-SIGMA ANALOG-TO-DIGITAL CONVERTERS Public/Granted day:2016-03-10
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