Integrated circuit having a boosted node
AssigneeAT&T Bell Laboratories
InventorHyun Lee
Life of this patent
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AssigneeAT&T Bell Laboratories
InventorHyun Lee
Estimating the term…
A wide variety of integrated circuit applications exist for boosted nodes, wherein a voltage is boosted above the power supply level. Typical uses include clock driver circuits in microprocessors, row lines in dynamic and static memory chips, and substrate bias generators. However, in the prior art, only n-channel transistors have been usable to boost nodes above the positive power supply level, to prevent forward-biasing the drain-to-substrate diode. The present invention allows a p-channel device source/drain region to be connected to a boosted node. This is accomplished by also boosting the voltage of the n-tub in which the device is formed, thereby allowing the p+ source/drain regions to be boosted without latch-up or other problems. Similarly, n-channel devices may be connected to nodes boosted more negative than V.sub.SS.
An integrated circuit comprising a transistor having source/drain regions of a given conductivity type formed in a doped tub region of the opposite conductivity type formed in a semiconductor substrate of said given conductivity type, and means for boosting the voltage of a source/drain region of said transistor to greater than a given power supply voltage,
An integrated circuit having a first voltage boosting circuit comprising a field effect transistor having source/drain regions of a given conductivity type formed in a first tub region of the opposite conductivity type, with said boosting circuit producing on said source/drain regions a first boosted voltage level greater than a given power supply voltage,
An integrated circuit comprising:
An integrated circuit having a first voltage boosting circuit comprising a field effect transistor having source/drain regions of a given conductivity type formed in a first tub region of the opposite conductivity type, with said boosting circuit producing on said source/drain regions a first boosted voltage level greater than a given power supply voltage,
Dependencies are inferred from the claim text.