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:

    The English language may hold a more disagreeable combination of words than “The doctor will see you now.” I am willing to concede something to the phrase “Have you anything to say before the current is turned on?”
    Robert Benchley (1889–1945)

    Just as a mirror may be used to reflect images, so ancient events may be used to understand the present.
    Chinese proverb.