Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2005-05-03
2005-05-03
Jeanpierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S119000
Reexamination Certificate
active
06888487
ABSTRACT:
A method for determining switching sequences of two-dimensional unary arrays of conducting branches of thermometrically decoded D/A converters, in a way that will ensure that the relative INL error function be contained between pre-established symmetrical upper and lower bound functions, has been found. When these upper and lower bound functions are constant, the obtained switching sequence compensates both the linear and the quadratic component of the error distribution and therefore is affected by a very small absolute INL error, which depends essentially on the random component of the error distribution.This method may be easily implemented by a computer program and allows the realization of thermometrically decoded D/A converters affected by a known limited INL error function.
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Geert A.M. Van Der Plas, et al.; “A 14-bit Intrinsic Accuracy Q2Random Walk CMOS DAC”; IEEE Journal of Solid-State Circuits; Dec. 1999; pp. 1708-1718; vol. 34, No. 12; IEEE; New York.
Yonghua Cong et al.; “Switching Sequence Optimization for Gradient Error Compensation in Thermometer-Decoded DAC Arrays”; IEEE Transaction on Circuits and Systems—II: Analog and digital Signal Processing; Jul. 2000; pp. 585-595; vol. 47, No. 7; IEEE; New York.
European Search Report dated Sep. 24, 2003.
Albertoni Fleana
Cretti Francesco
Graybeal Jackson Haley LLP
Jeanpierre Peguy
Jorgenson Lisa K.
Lauture Joseph
Santarelli Bryan A.
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