 TITLE:

Vector DeltaSigma Modulation with
Integral Shaping of HardwareMismatch Errors
 AUTHORS:
 Dan P. Scholnik
J. O. Coleman
 ABSTRACT:
 A common architecture here unifies ordinary scalar
deltasigma modulators, vector I/O deltasigma
modulators (including parallel banks of scalar ones),
mismatchshaping DACs, deltasigma modulators
incorporating mismatchshaping DACs in the
conventional way, and something new: scalar or vector
deltasigma modulators incorporating spectral shaping
of hardware mismatches as a natural and integral part
of the modulator structure. The common architecture
resembles a conventional deltasigma loop but using
vector signals and a vector quantizer to operate in a
space of higher dimension than the input/output, which
are inserted/extracted from the loop along a subspace.
The expansion of dimension provides the redundancy
that permits the spectral shaping of hardware errors.
This common view of these systems suggests that the
multidimensional structure of the quantizer is key.
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 STATUS:
 Presented at the
IEEE 2000 International Symposium on Circuits and Systems
(ISCAS 2000), Geneva, Switzerland, May 2000.