Northrop Grumman Systems Corporation

Northrop Grumman Corporation

Paul Charles MacFalda

Jeffrey Mark Hinrichs

Ian Robinson

Kenneth Weber

Jasmine Upendra Patel

William Marvin Skones

Frederic Joel Harris

Reza Dehmohseni

Ian Stuart Robinson

Kenneth B Weber

Frederic J Harris

Signal conversion is implemented employing a memory system operating as a look-up table that stores a plurality of sets of output samples associated with each of a plurality of respective input samples. The look-up table thus can generate a corresponding set of output samples in response to a given input sample, thereby emulating desired digital upsampling and delta-sigma modulation. The output samples can be aggregated, such as by multiplexing, to provide an output data stream at a desired sample rate.

Look-up table delta-sigma conversion

Signal conversion of an input signal can be achieved by processing portions of the signal through plural parallel paths, which collectively approximate a desired infinite impulse response (IIR) filter, either alone or implemented with other signal processing functions. In one aspect, each of the paths can perform filtering, noise-shaping and/or quantization on a respective portion of the input signal to provide a corresponding representation of the respective portion of the input signal, for example, a coarser representation at a higher data rate. The corresponding representations from the parallel paths can be aggregated and further processed in a desired manner, such as conversion to an analog signal.

Conversion employing delta-sigma modulation

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Redondo Beach, CA, United States of America

Paul Charles MacFalda