Modified current mirror with a 'voltage-following' capability
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A negative current mirror suitable for monolithic IC fabrication is described. It is unusual in that it is a 'voltage-following' circuit in which the input-output offset voltage is small and only weakly dependent on operating conditions. A base-current compensation scheme enables the circuit to exhibit a current transfer ratio comparable with that of the 'Wilson' current mirror.
[1] Barrie Gilbert. Wideband negative-current mirror , 1975 .