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mXSCNT
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I'm reading about feedback and I came across the following paragraph from http://en.wikipedia.org/wiki/Feedback:
This seems to imply that a feed-forward process is irreversible. The reason the signal can't provide power to recharge the battery is the 2nd law of thermodynamics.
Is the converse true - are feed-back processes reversible in some sense?
The natural sense of feedforward is defined chemically by some irreversible reaction, or electronically by an active circuit element that has access to an auxiliary power supply, so as to be able to provide power gain to amplify the signal as it propagates from input to output. For example, an amplifier can use power from its controlled power reservoir, such as its battery, to provide power gain to amplify the signal; but the reverse is not possible: the signal cannot provide power to re-charge the battery of the amplifier.
This seems to imply that a feed-forward process is irreversible. The reason the signal can't provide power to recharge the battery is the 2nd law of thermodynamics.
Is the converse true - are feed-back processes reversible in some sense?
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