Patent · US Active

Delta-sigma modulator with limiter

US8842031B1 · kind B1 · utility

0Cited by

8References

17Claims

0Family size

Assignee

CIRRUS LOGIC, INC. · US

Inventors

Mohammad Ranjbar · San Jose, US
Bruce E. Duewer · Austin, US

Key dates

Filing date	Jul 1, 2013
Grant date	Sep 23, 2014
Priority date	—
Expiry date	Jul 1, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH03M3/444
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

The stability of a delta-sigma modulator may be improved by limiting a value within the delta-sigma modulator. For example, the value provided to a quantizer may be limited, by a limiter circuit in the delta-sigma modulator, to a value within a single step range of the quantizer. The limiter circuit may be placed in an inner loop of the delta-sigma modulator to decouple the stability of the inner loop from an outer loop. For example, a delta-sigma modulator may be constructed with an inner loop having a sixth order and an outer loop having a second order, in which the stability of the delta-sigma modulator is proportional to that of a second order.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.