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US 7,548,179 B2Granted
MASH sigma delta modulator
AssigneeTexas Instruments Incorporated
InventorSaket Jalan
Life of this patent
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Abstract
A Multi-stage noise shaping Sigma Delta Modulator (MSDM) and method of processing data using the MSDM are disclosed. The MSDM is capable of operating at high radio frequencies and is characterized by low power consumption, reduced latency and noise and occupies less area in an integrated circuit.
Claims19
A multi-stage sigma delta modulator comprising:
- first stage accumulators coupling directly to corresponding second stage accumulators for processing input data bits;
- and
- a combiner for assembling outputs from the accumulators to provide a processed output data.
A method of processing data in a multi-stage sigma delta modulator, the method comprising:
- processing input data bits at first stage accumulators to provide first-stage carry out bits and sum outputs;
- processing the sum outputs from the first stage accumulators at second stage accumulators to provide second-stage carry out bits, wherein the second stage accumulators receive the sum outputs directly from corresponding first stage accumulators;
- and
- assembling first-stage and second-stage carry out bits to provide a processed output data.
1 more element
An integrated circuit comprising:
- a processor;
- a sigma-delta amplitude modulation unit coupled to the processor;
- a digital frequency conversion unit coupled to the processor;
- and
- a power amplifier coupled to the sigma-delta amplitude modulation unit and the digital frequency conversion unit,
- wherein the sigma-delta amplitude modulation unit comprises a multi-stage sigma delta modulator comprising:
- first stage accumulators directly coupled to corresponding second stage accumulators for processing input data bits;
- and
- a combiner configured to assemble outputs from the accumulators to provide a processed output data.
6 more elements
Dependencies are inferred from the claim text.