Circuit with regulated power supply for reducing memory device operating power
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United States of America Patent
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Jul 7, 1998
Grant Date -
N/A
app pub date -
Nov 12, 1996
filing date -
Nov 12, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In accordance with a preferred embodiment of the invention, the wordline turn on voltage in an SRAM array is suppressed (e.g., maintained at or below 4.5 volts). This is accomplished by connecting a regulated voltage supply output to the wordline. The regulated voltage supply has a transfer function such that the Vccr (the output of the regulated voltage supply) does not exceed a threshold such as 4.5 volts. For example, the transfer function may be: Vccr=Vcc for Vcc<4.5 volts Vccr=4.5 volts for Vcc.gtoreq.4.5 volts where Vcc is the power supply voltage. As indicated above, the power consumed in an SRAM array is proportional to the selected wordline voltage. In accordance with the present invention, the power consumption will be generally unchanged when Vcc exceeds 4.5 volts.
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