Coded data generation or conversion – Converter compensation
Reexamination Certificate
2011-04-19
2011-04-19
Jeanglaude, Jean B (Department: 2819)
Coded data generation or conversion
Converter compensation
C341S117000, C341S120000, C341S119000, C341S155000
Reexamination Certificate
active
07928872
ABSTRACT:
An analog-to-digital converter includes a first preamplifier receiving a first reference voltage and an input signal, a second preamplifier receiving a second reference voltage and the input signal, a first preamplifier calibrator placed for the first preamplifier and adjusting an input offset of the first preamplifier, a second preamplifier calibrator placed for the second preamplifier and adjusting an input offset of the second preamplifier, an interpolator placed between output terminals of the first and second preamplifiers and generating an interpolation signal having a voltage value between a first output signal from the first preamplifier and a second output signal from the second preamplifier, comparators receiving the first output signal, the second output signal or the interpolation signal and outputting a digital value based on the received signal, and comparator calibrators placed for at least comparators receiving the interpolation signal among the comparators and adjusting input offsets of the corresponding comparators.
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Robert C. Taft et al., A 1.8-V 1.6-GSamples/s 8-b Self-Calibrating folding ADC With 7.26 ENOB at Nyquist Frequency, Journal of Solid-State Circuits, Dec. 2004, vol. 39, No. 12, 9 pages.
Foley & Lardner LLP
Jeanglaude Jean B
Renesas Electronics Corporation
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