Abstract
An improved active-feedback CMOS cascode current mirror is introduced which has a very accurate current reflection ratio, while achieving the same output impedance as that of an equivalent conventional active-feedback cascode current mirror (CAFCCM) and a wider and optimal output dynamic range. The design can be made with even lower power consumption than CAFCCM and similar chip area. The technique can also be implemented in bipolar and BiCMOS integrated circuit design. The new structure does not need an additional constant current source as CAFCCM does. With these features, the circuit is suitable for use in high precision analogue integrated circuit design; especially in design of currentmode and low-voltage integrated circuits.
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