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Definition of "gate length" |
the length in microns of that portion of the FET channel, as measured in the direction of channel current flow, that can be pinched off by application of the proper control bias. Gate lengths are usually on the order of 0.1 to 2 microns. The fmax of a FET is inversely proportional to the gate length. If the length is very short (less than 0.05 microns for GaAs), then quantum effects play a role in device operation. |
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