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 circuit, circuits, linear, circuit":

**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 ... 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**...

... 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 ... 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 ...

### Famous quotes containing the word circuit:

“Within the *circuit* of this plodding life

There enter moments of an azure hue,

Untarnished fair as is the violet

Or anemone, when the spring strews them

By some meandering rivulet, which make

The best philosophy untrue that aims

But to console man for his grievances.

I have remembered when the winter came,”

—Henry David Thoreau (1817–1862)