A **linear circuit** is an electronic circuit in which, for a sinusoidal input voltage of frequency *f*, any steady-state output of the circuit (the current through any component, or the voltage between any two points) is also sinusoidal with frequency *f*. Note that the output need not be in phase with the input.

An equivalent definition of a linear circuit is that it obeys the superposition principle. This means that the output of the circuit *F(x)* when a linear combination of signals *ax _{1}(t) + bx_{2}(t)* is applied to it is equal to the linear combination of the outputs due to the signals

*x*and

_{1}(t)*x*applied separately:

_{2}(t)Informally, a linear circuit is one in which the values of the electronic components, the resistance, capacitance, inductance, gain, etc. don't change with the level of voltage or current in the circuit.

Read more about Linear Circuit: Examples, Significance, Small Signal Approximation

### Other articles related to "linear, linear circuit, circuits, circuit":

... Originally, most AC/DC adapters were

**linear**power supplies, containing a transformer to convert the mains electricity voltage to a lower voltage, a rectifier to convert it to pulsating DC, and a filter ... with load for equipment requiring a more stable voltage,

**linear**voltage regulator circuitry was added ... Losses in the transformer and the

**linear**regulator were considerable efficiency was relatively low, and significant power dissipated as heat even when not driving a load ...

**Linear Circuit**- Small Signal Approximation

... So in analysing many

**circuits**where the signal levels are small, for example those in TV and radio receivers, nonlinear elements can be replaced with a

**linear**small-signal model, allowing

**linear**analysis ... Conversely, many

**linear circuit**elements show nonlinearity as the signal level is increased ... If nothing else, the power supply voltage to the

**circuit**usually puts a limit on the magnitude of voltage output from a

**circuit**...

### Famous quotes containing the word circuit:

“We are all hostages, and we are all terrorists. This *circuit* has replaced that other one of masters and slaves, the dominating and the dominated, the exploiters and the exploited.... It is worse than the one it replaces, but at least it liberates us from liberal nostalgia and the ruses of history.”

—Jean Baudrillard (b. 1929)