RC Time Constant

The RC time constant, the time constant (in seconds) of an RC circuit, is equal to the product of the circuit resistance (in ohms) and the circuit capacitance (in farads), i.e. = R × C.

It is the time required to charge or discharge the capacitor, through the resistor, by 0.632 Vo(≈ 63.2) percent of the difference between the initial value and final value. This value is derived from the mathematical constant e, specifically .

Read more about RC Time Constant:  Cutoff Frequency, Delay

Famous quotes containing the words time and/or constant:

    O Time and Change!—with hair as gray
    As was my sire’s that winter day,
    How strange it seems, with so much gone
    Of life and love, to still live on!
    Ah, brother! only I and thou
    Are left of all that circle now,—
    The dear home faces whereupon
    That fitful firelight paled and shone.
    John Greenleaf Whittier (1807–1892)

    I am constant as the northern star,
    Of whose true-fixed and resting quality
    There is no fellow in the firmament.
    William Shakespeare (1564–1616)