What is Current mirror?
A circuit that uses two matched transistors to copy the current flowing in one into the other (or at a fixed ratio). It is widely used for bias current sources and active loads in analog ICs.
Field: Bipolar transistors
Current mirror in the explanations
A current mirror passes a reference current through a diode-connected transistor (base shorted to collector) to set VBE, then applies the same VBE to a second transistor to copy the current.
Which circuit uses two matched transistors to make the curr…
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Related terms
Early effect Common-emitter circuit Crossover distortion Current gain (hFE) Cutoff region Darlington connection Emitter follower Forward-active region HBT (heterojunction bipolar transistor) Miller effect