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:
“We all participate in weaving the social fabric; we should therefore all participate in patching the fabric when it develops holes—mismatches between old expectations and current realities.”
—Anne C. Weisberg (20th century)
“The mirror of all Christian kings.”
—William Shakespeare (1564–1616)