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config:netlist [2022/05/19 11:55] rajit [Transistor device names] |
config:netlist [2022/05/19 11:59] rajit |
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| int fold_nfet_width 0 | int fold_nfet_width 0 | ||
| </ | </ | ||
| - | This is used as a width threshold to trigger folding of transistors (0 = no folding). Extra fingers are automatically generated with this option. The parameter specifies a folding threshold F. Transistors with width larger than F are converted into multiple fingers. | + | This is used as a width threshold to trigger folding of transistors (0 = no auto folding). Extra fingers are automatically generated with this option. The parameter specifies a folding threshold F. Transistors with width larger than F are converted into multiple fingers. |
| If a transistor has width W that is larger than the folding threshold F, then (W div F) transistors of width F are generated. If (W mod F) is smaller than the minimum width, then the extra width is added to the last of the (W div F) transistors; | If a transistor has width W that is larger than the folding threshold F, then (W div F) transistors of width F are generated. If (W mod F) is smaller than the minimum width, then the extra width is added to the last of the (W div F) transistors; | ||
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| If this is turned on, this permits the use of long channel devices when applying the sizing body. This might be needed if the width/ | If this is turned on, this permits the use of long channel devices when applying the sizing body. This might be needed if the width/ | ||
| - | + | ===== Sizing limits ===== | |
| - | ====== Sizing limits | + | |
| Internally, act maintains width and lengths of transistors as integer-valued variables that are a multiple of the manufacturing grid. Hence, if the ratio of lambda/ | Internally, act maintains width and lengths of transistors as integer-valued variables that are a multiple of the manufacturing grid. Hence, if the ratio of lambda/ | ||