| 摘要 |
An integrated circuit chip is disclosed which can be coupled directly to and operated from a source of AC potential. To prevent conduction between the substrate and epitaxial layer of the chip which otherwise will occur and result in inoperativeness and possible catastrophic failure, a diode is formed between the substrate and one terminal of the AC source, such that the diode is conductive only during half-cycle of one polarity of the AC signal, thereby referencing the substrate to ground or reference potential during that time. During the half cycles of opposite polarity, the substrate is "floating." Means are provided for impairing parasitic device action due to the presence of the additional diode.
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