i saw a long channel mosfet in a paper with a W/L ratio of 2u/300um, but my current 0.18um library does not allow such long channel, is there any method to do the weird mosfet sizing in 0.18um process?
I think you can use 30 2u/10u in serial to do that.
Such a transistor, do you want to use it for a high value resistor?
I wanna to know what is that application?
I have made a few chips with such a long channels, too. The application? MOSFET may be used as a tunable distributed RC line... In one element there are at least two: R, the channel resistance and C, the gate oxide capacitance. Just one transistor may work as a simple LP filter.