| 摘要 |
A cascaded output buffer stage and buffering method converts a voltage level of a received internal signal, such as a signal to be output (transmitted) from the cascaded output buffer stage, prior to outputting the received signal; selectively provides a variable reference voltage signal for a cascaded circuit element in the output buffer and also generates a floating well output signal for wells associated the cascaded upper buffer circuit elements. The cascaded output buffer stage is also, in one embodiment, a single gate oxide cascaded output buffer stage. In one embodiment, a voltage level shifting circuit is used along with a variable reference generating circuit that provides a variable reference voltage signal to cascaded output buffer circuits, and that also provides a floating well output signal to wells of the cascaded circuit. The voltage level shifting circuit and variable reference generating circuit is operatively coupled to a cascaded pull up circuit or cascaded pull down circuit as needed.
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