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=== Other current mirrors === There are many sophisticated current mirrors that have higher [[output impedance|output resistances]] than the basic mirror (more closely approach an ideal mirror with current output independent of output voltage) and produce currents less sensitive to temperature and device parameter [[design for manufacturability (IC)|variations]] and to circuit voltage fluctuations. These multi-transistor mirror circuits are used both with bipolar and MOS transistors. These circuits include: * the [[Widlar current source]] * the [[Wilson current mirror]] used as a current source * [[Cascode]]d current sources
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