dc offset


Joined Dec 23, 2011
what is dc offset exactly and how is it applied to electronic circuits?
DC offset is a deliberate introduction of a DC level to a circuit to shift its operating point.

For example, DC offset is applied to transistors to make them work correctly, as well as op-amps for use with a single polarity power supply.

There are countless other examples, but those are common ones. :)


Joined Nov 25, 2009
DC offset might be a bad thing sometimes. When wiring an Operational Amplifier, a DC voltage will appear at its output even no voltage difference is applied at its input.

There are ways to counter that, though.


Joined Nov 25, 2011
DC offset occurs when hardware,for example, such as a sound card, adds DC current to a recorded audio signal. This current results in a recorded waveform that is not centred around the baseline .

In some cases, when DC-Offset is present, glitches and other unexpected results can occur when sound effects are applied to the audio file. You can compensate for this DC offset by adding a constant value to the samples in the sound file.