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level shifters. A good example, is the 4053 standard chip, commonly used to select between analogue inputs to an audio amplifier, has a separate ground (pin 8) and negative substrate connection (pin 7) that also supplies the level shifter.

See also

* Tri-state logic
* Analogue switch

References

* Ulrich Tietze, Christoph Schenk: Halbleiter-Schaltungstechnik. 12. Auflage, Springer, Berlin/Heidelberg/New York 2002, .
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