Title:
SIGMA-DELTA DIFFERENCE-OF-SQUARES RMS-TO-DC CONVERTER WITH MULTIPLE FEEDBACK PATHS
Document Type and Number:
WIPO Patent Application WO/2012/078895
Kind Code:
A3
Abstract:
Architectures of ΣΔ difference-of-squares RMS-to-digital converters employing multiple feedback paths. Additional feedback paths enable a stable ΣΔ closed-loop behavior in different topologies where the RMS level of the quantization error processed by the squaring non-linearity is minimized. Such feedback paths include low pass filtered and constant gain feedback paths, low pass and high pass filtered paths or multiple low pass filtered paths. These can be combined with multiple integrators in the forward path, with frequency compensation provided by additional feed forward or feedback paths. Electronic configurability can further extend the total input referred dynamic range (DR) of such architectures.
Inventors:
SILVA PAULO GUSTAVO RAYMUNDO (NL)
Application Number:
PCT/US2011/063980
Publication Date:
October 04, 2012
Filing Date:
December 08, 2011
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC (US)
TEXAS INSTRUMENTS JAPAN (JP)
SILVA PAULO GUSTAVO RAYMUNDO (NL)
TEXAS INSTRUMENTS JAPAN (JP)
SILVA PAULO GUSTAVO RAYMUNDO (NL)
International Classes:
H03M3/02; H03M1/12
Foreign References:
| US7545303B1 | 2009-06-09 | |||
| US7545302B1 | 2009-06-09 | |||
| US20070270116A1 | 2007-11-22 | |||
| US6359576B1 | 2002-03-19 |
Attorney, Agent or Firm:
FRANZ, Warren, L. et al. (Deputy General Paent CounselP.O. Box 655474, Mail Station 399, Dallas TX, US)
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