Differential bootstrapped track-and-hold circuit with cross-coupled dummy sampling switches
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United States of America Patent
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Dec 20, 2022
Grant Date -
N/A
app pub date -
Jun 25, 2021
filing date -
Jun 25, 2021
priority date (Note) -
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Abstract
Embodiments of a differential bootstrapped track-and-hold circuit are disclosed. In an embodiment, the differential bootstrapped track-and-hold circuit includes first and second single-ended bootstrapped track-and-hold circuits. Each single-ended bootstrapped track-and-hold circuit includes a sampling switch connected between an input terminal and an output terminal, a sampling capacitor connected to the output terminal, and a dummy sampling switch connected between the input terminal and a dummy output terminal. The sampling switch and the dummy sampling switch are controlled by a bootstrap driver connected to the input terminal. The dummy output terminal of the first single-ended bootstrapped track-and-hold circuit is connected to the output terminal of the second single-ended bootstrapped track-and-hold circuit and the dummy output terminal of the second single-ended bootstrapped track-and-hold circuit is connected to the output terminal of the first single-ended bootstrapped track-and-hold circuit to provide signals to compensate for charge injection errors at the output terminals.
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