Buffer with an output swing created using an over-supply voltage
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United States of America Patent
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Jun 11, 2013
Grant Date -
Oct 7, 2010
app pub date -
Apr 1, 2010
filing date -
Apr 2, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A pre-drive circuit with an output buffer that may contain a bootstrap circuit is described. The bootstrap circuit may be configured to output a voltage level greater in magnitude than the supply voltage that the bootstrap circuit is coupled with. The pre-drive circuit may contain a timing circuit. The timing circuit may be configured to at least partially determine when the bootstrap circuit outputs a voltage greater in magnitude than the supply voltage. The pre-drive circuit may also contain a pre-drive buffer circuit. This pre-drive buffer circuit may be capable of three outputs: (1) logical zero, or roughly electrical ground; (2) logical one, or roughly the level of the voltage supply, and (3) an outputted voltage greater than the voltage supply.
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