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US 6,188,344 B1Granted
Signal processors
AssigneesSony Corporation, Sony United Kingdom Limited
InventorsPeter Charles Eastty, Christopher Sleight, Peter Damien Thorpe
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Abstract
A 1-bit signal processor receives a 1-bit signal having a first sampling rate eg 64 fs. An upconverter (41) increases the sampling rate to eg 128 fs. A series of Delta Sigma Modulators (42, 43) processes the signal. The processed signal is down-converted by a converter (44) to 64 fs. As least the Delta Sigma Modulators may be implemented on an integrated circuit. The down-converter is arranged to prevent noise being folded back into the signal band.
Claims10
A signal processor for processing 1-bit signals comprising:
- an input for receiving a 1-bit signal having a first sampling rate;
- means coupled to the input for increasing the first sampling rate to a second sampling rate greater than the first rate;
- a plurality of 1-bit nth order Delta-Sigma Modulators (where n≧1) arranged in a series of stages for processing the signals at the second sampling rate;
- and
- means coupled to the stages to receive the processed 1-bit signal and to reduce the second sampling rate to the first sampling rate for output.
2 more elements
Dependencies are inferred from the claim text.