Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2007-08-09
2008-09-16
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S118000, C341S120000, C341S131000, C341S144000, C341S155000
Reexamination Certificate
active
07425911
ABSTRACT:
Improving signal-to-noise ratio (SNR) when using fewer bits than the number of output bits of an ADC as digital representation of the strength of the samples of an input signal. In an embodiment, an ADC generates digital values of H bits by sampling an input signal at corresponding time instances. An error signal representing the (H-N) least significant bits of the H-bit digital values is processed to determine respective filtered values, which are respectively added to the corresponding ones of the H-bit digital values. The (H-N) bits of the resulting added values are dropped to generate N bit values. The N bit values thus generated may have improved SNR at least in a band of interest, as desired.
REFERENCES:
patent: 5493296 (1996-02-01), Sugihara
patent: 6232899 (2001-05-01), Craven
patent: 6275177 (2001-08-01), Ho et al.
patent: 6323794 (2001-11-01), Okuda et al.
patent: 6326912 (2001-12-01), Fujimori
patent: 6507302 (2003-01-01), Sakimura
patent: 6522276 (2003-02-01), Andre et al.
patent: 6839010 (2005-01-01), Tsyrganovich
patent: 6967608 (2005-11-01), Maloberti et al.
patent: 7245246 (2007-07-01), Ihs et al.
patent: 2004/0036634 (2004-02-01), Level et al.
patent: 2007/0205934 (2007-09-01), Buisson
R.J. Baker, J. Candy, G. Temes, S. Norsworthy, R. Schreier, G. Temes, Mingliang Liu, R. Schreier, G. Temes, V. Peluso, M. Steyaert, W. Sansen; Delta-sigma modulation—Wikipedia, the free encyclopedia, “http://en.wikipedia.org/wiki/Delta-sigma—modulation”, pp. 01-06, Downloaded on Jul. 27, 2007, Wikimedia Foundation, Inc., a us-registered 501(c)(3).
Kiran Ganesh
Venkataraman Jagannathan
Viswanathan Nagarajan
Brady III Wade J.
Nguyen Linh V
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
LandOfFree
Signal-to-noise ratio when using fewer bits than the number... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal-to-noise ratio when using fewer bits than the number..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal-to-noise ratio when using fewer bits than the number... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3974614