2007-06-17 22:36:14 · 4 answers · asked by nasirbd633 1 in Science & Mathematics ➔ Engineering
The signal v = Vsin(wt) is symmetrical about zero, with a positive peak of V and a negative peak of -V. It has no DC offset.
In contrast, the signal v = Vsin(wt) + b is symmetrical about b, with peaks of b + V and b – V. It has a DC offset of b.
A DC offset is often introduced intentionally, so that a device such as a transistor is working at its correct DC operating point.
However, a DC offset may be unintentional and undesirable, as when an op-amp produces a non-zero output when both its inputs are at the same voltage. The maximum size of this DC offset (the difference between the inputs needed to return the output to zero) will be specified in the manufacturer's data sheet.
2007-06-17 23:44:32 · answer #1 · answered by rrabbit 4 · 0⤊ 0⤋
DC offset is an offsetting of a signal from zero. It's also the change in input voltage required to produce a zero output voltage when no signal is applied to an operational amplifier.
2007-06-18 05:47:00 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Just a CONSTANT voltage applied to a signal etc to shift its mean (or resting) position away from zero.
2007-06-18 05:57:13 · answer #3 · answered by blind_chameleon 5 · 0⤊ 0⤋
Its annoying and looks weird...but doesn't have an effect audio-wise... I hate it...
2013-09-18 19:21:27 · answer #4 · answered by Hamass 3 · 0⤊ 1⤋