Obviously,it depends on the situation.
consider a transistor amplifier.To minimize the change in collector current with respect to temperature,collector to base bias is used . This circuit uses a NEGATIVE FEEDBACK in order to compensate the rise in output current with temperature.
But in order to achieve maximum gain, the same circuit can use POSITIVE FEEDBACK by connecting the amplified output to the input .
A: Any feedback that contributes to the input is positive feedback any feedback that subtract from the input is negative feedback
Positive feedback
Yes because an amplifier with positive feedback is an oscillator.
A: Well for one thing if it is positive feedback the amplifier will saturate to one one side of the power buss or the other. An operational amplifier open loop gain can be 90Db which a tremendous gain so some negative feedback is necessary to reduce the gain and make the amplifier behave in the linear region for amplification
describe current-shunt negative feedback as applied to operational amplifiers, including derivations of the gain relation for each type of negative feedback.
Is the clotting of blood an example of positive or negative feedback?
A: Any feedback that contributes to the input is positive feedback any feedback that subtract from the input is negative feedback
No it is positive feedback
Positive feedback.
oxygen loading is a positive feedback response
when a woman's contractions speed up during labor is negative or positive feedback
No, negative feedback is the primary homeostatic mechanism regulating the endocrine system. Positive feedback is used much less frequently.
There are two types of feedback mechanisms: positive feedback, which amplifies processes, and negative feedback, which stabilizes systems. For More Information : agilityportal.io
Your statement is for positive feedback.
negative feedback
A negative feedback would be if the planet heats up, the glaciers will melt, lowering the albedo effect of the snow, and in turn causing the planet to heat up more That is positive feedback, not negative. Positive feedback enhances the initial stimulus, negative feedback reverses the initial stimulus. The planet starts by heating up, then heats up even more, which is positive feedback.
Negative. There are VERY few positive feedback mechanisms in the body- the only one i know about is birth. Think of negative feedback and positive as a line.