Northrop Grumman Systems Corporation

Jasmine Upendra Patel

Jeffrey Mark Hinrichs

Ian Robinson

Kenneth Weber

Paul Charles MacFalda

William Marvin Skones

Frederic Joel Harris

Reza Dehmohseni

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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Torrance, CA, United States of America

Jasmine Upendra Patel