A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being 'copied' can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits
Read more about Current Mirror: Mirror Characteristics, Practical Approximations
Famous quotes containing the words current and/or mirror:
“The first opinion that occurs to us when we are suddenly asked about something is usually not our own but only the current one pertaining to our class, position, or parentage; our own opinions seldom swim on the surface.”
—Friedrich Nietzsche (1844–1900)
“I have had no other treasure in this world than to see you once perfect and complete, as much in virtue, honesty and wisdom, as in all free and honest learning, and so leave you after my death like a mirror representing my person—your father—if not as excellent in fact as I would wish, certainly so in desire.”
—François Rabelais (1494–1553)