Paul Charles Macfalda

US Patent:

7190288, Mar 13, 2007

Filed:

Jun 27, 2003

Appl. No.:

10/608932

Inventors:

Ian Stuart Robinson - Venice CA, US
Jeffrey Mark Hinrichs - San Diego CA, US
Jasmine Upendra Patel - Torrance CA, US
Paul Charles MacFalda - Redondo Beach CA, US
Reza Dehmohseni - Oak Park CA, US
Frederic J. Harris - Lemon Grove CA, US
Kenneth Weber - Redondo Beach CA, US

Assignee:

Northrop Grumman Corp. - Los Angeles CA

International Classification:

H03M 7/00

US Classification:

341106, 341143

Abstract:

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.

US Patent:

20040252038, Dec 16, 2004

Filed:

Jun 12, 2003

Appl. No.:

10/459750

Inventors:

Ian Robinson - Venice CA, US
Jeffrey Hinrichs - San Diego CA, US
Kenneth Weber - Redondo Beach CA, US
Jasmine Patel - Torrance CA, US
Paul MacFalda - Redondo Beach CA, US
William Skones - Manhattan Beach CA, US

International Classification:

H03M003/00

US Classification:

341/143000

Abstract:

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.