Boots – shoes – and leggings
Patent
1996-12-24
1999-01-26
Sheikh, Ayaz R.
Boots, shoes, and leggings
36471802, 36471704, 36471803, G06F 102
Patent
active
058644920
ABSTRACT:
A digital synthesizer for producing a digital frequency signal includes a phase accumulator for repeatedly accumulating a phase value to generate samples of a digital sawtooth signal and a look-up table of digital samples for converting the digital sawtooth signal to a digital waveshape signal. In order to reduce the effect of the quantization of the digital samples, the synthesizer also includes a randomizer for applying a randomizing factor to output digital samples for forming the digital frequency signal. The randomizer includes a randomizing factor generator connected to receive P bits of each digital sample for generating at least one randomizing bit and an summer for summing the remaining N bits of the digital sample and the at least one randomizing bit to generate a digital waveshape sample of the digital frequency signal.
REFERENCES:
patent: 4410954 (1983-10-01), Wheatly, III
patent: 4815018 (1989-03-01), Reinhardt et al.
patent: 4975699 (1990-12-01), Frey
patent: 5014231 (1991-05-01), Reinhart et al.
patent: 5202642 (1993-04-01), Dixon
patent: 5459680 (1995-10-01), Zimmerman et al.
patent: 5467294 (1995-11-01), Hu et al.
patent: 5495505 (1996-02-01), Kundmann
patent: 5513219 (1996-04-01), Ham
patent: 5563535 (1996-10-01), Corry et al.
IEEE Transactions on Communications, vol. 39, No. 7, Jul. 1, 1991, pp. 1046-1048, XP000264864, O'Leary et al., "A Direct-Digital Synthesizer with Improved Spectral Performance".
IEEE Journal of Solid-State Circuits, vol. 28, No. 5, May 1, 1993, pp. 553-559, XP000368743, Riley et al., "Delta-Sigma Modulation in Fractional-N Frequency Synthesis".
Microwaves & RF, vol. 32, No. 1, Jan. 1993, Penton, Cleveland, OH, USA, pp. 59-66, XP000568956, B. Miller, "Technique Enhances the Performance of PLL Synthesizers".
Proceedings of the 37th Midwest Symposium on Circuits and Systems, Aug. 3-5, 1994, IEEE New York, USA, pp. 269-270, XP000532022, W. Chren, "Area and Latency Improvements for Direct Digital Synthesis Using the Residue Number System".
LSI Logic Corporation
Sheikh Ayaz R.
Vo Tim T.
LandOfFree
Randomized digital waveshape samples from a look up table does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Randomized digital waveshape samples from a look up table, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Randomized digital waveshape samples from a look up table will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1454772