Question

What are negative feedback oscillators?

Answer 1

Negative feedback oscillators:

1. An oscillating circuit that includes an amplifier, in which the output is fed back in phase with the input.
2. Oscillations are maintained at a frequency, which is determined by the values of the components in the amplifier and the feedback circuits.
3. In negative feedback oscillators, the input and output signals are of different phases thus the two are subtracted.
4. Regulatory networks, which depend in some way on a negative feedback loop are also capable of generating repeated oscillations by the activity of one of their components.
5. Such systems are known as negative feedback oscillators.
6. We can simply illustrate how these oscillators work by returning to a very simple ligand–kinase model containing a positive feedback loop.
7. Imagine that if this system also includes a negative feedback loop, then the activated kinase is able to phosphorylate and activate an inhibitor protein that then binds the kinase and blocks its activity.
8. The activation of the kinase will, therefore, leads indirectly to its own inactivation and can bring kinase activity back down to zero.
9. Four types of negative feedback exist voltage series, voltage shunt, current series, and current shunt.

Thus, negative feedback oscillators are regulatory networks that depend in some way on a negative feedback loop.