Coded data generation or conversion – Converter calibration or testing
Reexamination Certificate
2006-08-15
2006-08-15
Wamsley, Patrick (Department: 2819)
Coded data generation or conversion
Converter calibration or testing
C341S161000, C702S107000
Reexamination Certificate
active
07091891
ABSTRACT:
An improved pipelined analog to digital converter that facilitates calibration for non-linearity errors and a method for obtaining calibration values. The analog to digital converter has a calibration mode in which the output bits for stages in the pipeline can be coupled to output pins of the device. Device pins that are used in normal operating mode to output the most significant bits of the ADC output are used in calibration mode to make available output bits of a pipeline stage being calibrated. A calibration method takes advantage of the outputs of the stages being directly observable to compute calibration values. The output bits of a pipeline stage are monitored as the analog input to the ADC is increased. A change in these bits identifies a subrange boundary. Errors are measured for values immediately above and immediately below each subrange boundary and used to compute correction factors.
REFERENCES:
patent: 4973976 (1990-11-01), Lee et al.
patent: 5047769 (1991-09-01), Engeler et al.
patent: 5214430 (1993-05-01), Gulczynski
patent: 5635937 (1997-06-01), Lim et al.
patent: 5784016 (1998-07-01), Nagaraj
patent: 5977894 (1999-11-01), McCarroll et al.
patent: 6031478 (2000-02-01), Oberhammer et al.
patent: 6121908 (2000-09-01), Sevastopoulos et al.
patent: 6169502 (2001-01-01), Johnson et al.
patent: 6198314 (2001-03-01), Kase
patent: 6198420 (2001-03-01), Ryan et al.
patent: 6252536 (2001-06-01), Johnson et al.
patent: 6259392 (2001-07-01), Choi et al.
patent: 6304205 (2001-10-01), Rezvani et al.
patent: 6310571 (2001-10-01), Yang et al.
patent: 6323800 (2001-11-01), Chiang
patent: 6340944 (2002-01-01), Chang et al.
patent: 6384757 (2002-05-01), Kosonen
patent: 6384758 (2002-05-01), Michalski et al.
patent: 6459394 (2002-10-01), Nadi et al.
patent: 6472897 (2002-10-01), Shyr et al.
patent: 6486806 (2002-11-01), Munoz et al.
patent: 6501411 (2002-12-01), Soundarapandian et al.
patent: 6563445 (2003-05-01), Sabouri
patent: 6570411 (2003-05-01), Bardsley et al.
patent: 6570523 (2003-05-01), Bacrania et al.
patent: 6606042 (2003-08-01), Sonkusale et al.
patent: 6621434 (2003-09-01), Barry et al.
patent: 6633249 (2003-10-01), Whittaker et al.
patent: 6639744 (2003-10-01), Ohno
patent: 6642871 (2003-11-01), Takeyabu et al.
patent: 6650881 (2003-11-01), Dogan
patent: 6683554 (2004-01-01), Nikai et al.
patent: 6741194 (2004-05-01), Cassagnes et al.
patent: 6822601 (2004-11-01), Liu et al.
patent: 6836230 (2004-12-01), Le Pailleur et al.
patent: 6861969 (2005-03-01), Ali
patent: 6891486 (2005-05-01), Pentakota et al.
patent: 6894631 (2005-05-01), Bardsley
patent: 6975950 (2005-12-01), Bardsley
patent: 2004/0051657 (2004-03-01), Jonsson et al.
patent: 2004/0070530 (2004-04-01), You
Analog Devices, “10-Bit, 40 MSPS, 3 V, 74 mW A/D Converter,” AD9203, 2001, pp. 1-24, no month.
Analog Devices, “IF Digitizing Subsystem,” AD9874, 2003, pp. 1-40, no month.
Analog Devices, “12-Bit, 105 MSPS/125 MSPS IF Sampling A/D Converter,” AD9433,2001, pp. 1-24, no month.
Dallas Mazim Semiconductor, “INL/DNL Measurements for High-Speed Analog-to-Digital Converters (ADCs),” http://www.maxim-ic.com/appnotes.cfm?appnote—number=283, downloaded Jan. 27, 2004, pp. 1-8.
Bardsley Scott G.
Rigsbee Baeton C.
Analog Devices Inc.
Wamsley Patrick
Wolf Greenfield & Sacks P.C.
LandOfFree
Calibration of analog to digital converter by means of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Calibration of analog to digital converter by means of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calibration of analog to digital converter by means of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3674376