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Unformatted text preview: out V of both mirrors for two different input currents, one in weak or moderate inversion and one in strong inversion, similar to the ones shown below. Comments on whether the current gain is ever unity and, if so, how in V and out V are related at this point. For the n MOS mirror, the random current-gain error due to mismatch will probably be greater than the systematic current-gain error due to the Early effect, so that the current gain may or may not go through unity. For the p MOS mirror, the systematic gain error is probably larger than the random one due to mismatch, so the current gain may go through unity. If there were no random error, in out V V = at this point. Comments on by how much the current gain changes as out V changes. For an n MOS mirror, the gain will not change by as much as it will for a p MOS mirror, because these p MOS transistors have a larger Early effect than do the n MOS ones....
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- Spring '07