US 6,144,328 AGranted

Cascaded delta sigma modulators

AssigneeSony United Kingdom Limited

InventorsPeter Charles Eastty, Peter Damien Thorpe, Christopher Sleight

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Abstract

A signal processor for processing 1-bit signals comprising at least a pair of Delta Sigma Modulators (DSM) coupled in series, one of the said pair of DSMs having an signal-band noise-shaping filter characteristic complementary to the signal-band noise-shaping filter characteristic of the other of the pair of DSMs.

Claims12

Dependent claims

A signal processor for processing 1-bit signals comprising at least a pair of Delta Sigma Modulators (DSM) coupled in series, one of the said pair of DSMs having a signal-band noise-shaping filter characteristic complementary to the signal-band noise-shaping filter characteristic of the other of the pair of DSMs.

Dependencies are inferred from the claim text.

Facts

Application: 09/177,394Filed 23 Oct 1998
Priority: GB 972252224 Oct 1997
Granted: 7 Nov 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H03M 7/3006
Digital delta-sigma modulation: compensating for, or preventing of, undesired influence of physical parameters
H03M 7/3028
Having one quantiser only: the quantiser being a single bit one
H03M 7/3033
Characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path: the modulator having a higher order…
H03M 7/304
The modulator having a higher order loop filter in the feedforward path, e.g. with distributed feedforward inputs: with distributed feedback, i.e.…

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No related US applications are recorded in the indexed filing history.

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