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Can a transistor have a W/L ratio of 1/8?

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dra66ard

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Hi, I m using TSMC 0.13um technology, i would like to ask whether can a transistor havr w/l ratio of 1/8? Where the length is larger than width to have a higher voltage gain and lesser current gain. Thank you
 

That would depend on the PDK's construction, device rules.

The voltage gain of a single device is not the stage gain.
The active gm and the parallel Rout of all connected drains
and stray impedances, is. Making your gain device longer
will probably not pan out. Unless you work a lot on the load
too, and even then you're probably giving away something
else of value (like bandwidth).
 

Of course you can. For example, there are some situations where you need high resistance transistors in a small area. Then you can implement the W/L being the width times smaller than the length.
 

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