Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1994-12-14
1996-11-26
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341118, H03M 106
Patent
active
055790054
ABSTRACT:
An analog-to-digital converter (ADC), comprising an internal digital-to-analog converter (DAC), driven by a successive approximation register (SAR), and a comparator, is provided with a correction logic circuit that controls the execution of a verifying and correcting routine at the end of each conversion routine. Master-Slave cells that compose the SAR are provided with a dedicated circuitry, responding to said correction control circuit, for confirming, incrementing or decrementing the bit stored in the cell by at least an LSB. An extremely simple routine, performed at the end of each conversion cycle, allows correction of incorrectly converted digital data because of the occurrence of missing codes in the internal DAC. The corrector does not require the use of memories and/or analog circuits and is very cost- effective and permits a greatly improved production yield of complex devices containing ADCs.
REFERENCES:
patent: 3775747 (1973-11-01), Gabriel et al.
patent: 3891984 (1975-06-01), Kerwin et al.
patent: 4641129 (1987-02-01), Doluca et al.
patent: 5218362 (1993-06-01), Mayes et al.
Anderson Matthew
Formby Betty
Groover Robert
SGS-Thomson Microelectronics S.R.L.
Young Brian K.
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