Current Mirror

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:

    But there, where I have garnered up my heart,
    Where either I must live or bear no life;
    The fountain from the which my current runs
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    To knot and gender in!
    William Shakespeare (1564–1616)

    There is a small steam engine in his brain which not only sets the cerebral mass in motion, but keeps the owner in hot water.
    —Unknown. New York Weekly Mirror (July 5, 1845)