Coded data generation or conversion – Converter compensation
Reexamination Certificate
2007-07-10
2007-07-10
Nguyen, Khai M. (Department: 2819)
Coded data generation or conversion
Converter compensation
C341S150000, C341S155000, C341S161000, C341S172000, C327S157000
Reexamination Certificate
active
11277942
ABSTRACT:
An error averaging comparator based switch capacitor (CBSC) circuit cyclically operates through a sampling phase, a first transfer phase, and a second transfer phase. During the sampling phase, an input voltage is sampled. During the first transfer phase, the sampled input voltage is amplified by a fixed ratio and transferred to a first load. During the second transfer phase, the sampled input voltage is amplified by the same fixed ratio and transferred to a second load. The circuit configuration during the second transfer phase is substantially the same as that during the first transfer phase, except that the at least one of its circuit elements is connected in a reverse polarity. Due to the reverse polarity, the respective errors due to circuit non-idealities during the two transfer phases are exactly opposite. By combining the outputs taken at the first load and at the second load, the errors are averaged out.
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Hsu Winston
Nguyen Khai M.
Realtek Semiconductor Corp.
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