RC Circuit - Parallel Circuit

Parallel Circuit

The parallel RC circuit is generally of less interest than the series circuit. This is largely because the output voltage is equal to the input voltage — as a result, this circuit does not act as a filter on the input signal unless fed by a current source.

With complex impedances:

I_R = \frac{V_{in}}{R}\,

and

I_C = j\omega C V_{in}\, .

This shows that the capacitor current is 90° out of phase with the resistor (and source) current. Alternatively, the governing differential equations may be used:

I_R = \frac{V_{in}}{R}

and

I_C = C\frac{dV_{in}}{dt} .

When fed by a current source, the transfer function of a parallel RC circuit is:

\frac{V_{out}}{I_{in}} = \frac{R}{1+sRC} .

Read more about this topic:  RC Circuit

Famous quotes containing the words parallel and/or circuit:

    “One writes of scars healed, a loose parallel to the pathology of the skin, but there is no such thing in the life of an individual. There are open wounds, shrunk sometimes to the size of a pin-prick but wounds still. The marks of suffering are more comparable to the loss of a finger, or the sight of an eye. We may not miss them, either, for one minute in a year, but if we should there is nothing to be done about it.”
    —F. Scott Fitzgerald (1896–1940)

    “each new victim treads unfalteringly
    The never altered circuit of his fate,
    Bringing twelve peers as witness
    Both to his starry rise and starry fall.”
    —Robert Graves (1895–1985)