Coded data generation or conversion – Converter calibration or testing
Patent
1995-03-06
1997-06-24
Gaffin, Jeffrey A.
Coded data generation or conversion
Converter calibration or testing
341121, 341145, H03M 110
Patent
active
056421168
ABSTRACT:
A method of self calibration for a segmented digital-to-analog converter is provided. The segmented digital-to-analog converter converts a digital input code to an analog output consisting of an analog output step and an analog calibration factor. The method comprises the step of determining a trim value for each segment of a segmented DAC. The method continues by storing the trim values in memory. Then, the trim values for a plurality of segments preselected to be enabled by a given digital input signal are summed, thereby producing a digital calibration factor associated with each given digital input signal. Last, storing each digital calibration factor in memory at an address corresponding to the associated digital input signal. Thereafter, when a particular digital input signal is received by the DAC, the preselected plurality of segmented current sources are switched to produce the analog output step, and the corresponding digital calibration factor is converted to the analog calibration factor and switched to the output of the segmented DAC.
REFERENCES:
patent: 4465996 (1984-08-01), Boyacigiller et al.
patent: 4573005 (1986-02-01), van de Plassche
patent: 5017919 (1991-05-01), Hult et al.
patent: 5153592 (1992-10-01), Fairchild et al.
patent: 5198814 (1993-03-01), Ogawara et al.
patent: 5270716 (1993-12-01), Gleim
patent: 5287108 (1994-02-01), Mayes et al.
patent: 5298898 (1994-03-01), Brunheim
IEEE International Solid-State Circuits Conf., Feb. 15, 1990, pp. 168-169.
IEEE Journal of Solid-State Circuits, vol. SC-16, No. 6, Dec. 1981, pp. 616-620.
IEEE Transactions on Circuits and Systems, vol. CAS 30, No. 3, Mar. 1983, pp. 188-190.
IEEE Journal Solid-State Circuits, vol. 3C-19, No. 6, Dec. 1984, pp. 813-819.
Analog Devices, Design-In Reference Manual, 1994, pp. 3-15 to 3-23 and 3-71 to 3-82 Aug. 1994.
Dillon Andrew J.
Gaffin Jeffrey A.
International Business Machines - Corporation
Kotulak Richard M.
Vick Jason H.
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