How can i get the parameter-VDDmin of SRAM bitcell?
When i measure VDDmin is in read operation or write operation? In addition, if i want to get parameter-VDDmin, it is just scan the VDD from high voltage to low voltage and see the Butterfly curve? I think this is very complicated, are there other ways? During simulating in Hspice or testing in B1500A,
Thank you! everyone.
You can measure vdd minimum for both read operation and write operation. After finding the vdd minimum for both the operation, you have to take the larger vdd minimum out of those because both the operation will be possible with larger vdd minimum but if you take the lowest vdd minimum then out read and write operation, one operation will be failed. If any further information required, I will be glad to provide you.
You have to check the butterfly curve. Keep on reducing the supply voltage and you will find that VTC of both the inverter is overlapping. If you reduce the supply voltage beyond that voltage, you will find that butterfly curve is not forming. So that is your vdd minimum.
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