Method of re-establishing the stability of a sigma-delta modulator and a circuit for implementing the method
US6489907B2 · kind B2 · utility
23Cited by
8References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 30, 2001 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Jul 30, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of re-establishing the stability of a sigma-delta modulator having a plurality of integrator stages in cascade and a quantizer, achieving very short resetting times, a bit sequence corresponding to an instability state of the modulator is defined, the bit-stream output by the modulator is monitored to check whether it includes the instability sequence and, if the instability sequence is detected, the last integrator stage is reset and one or more preceding integrator stages are reset, progressively, until the instability sequence is no longer detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.