Context?
1. Negative feedback can increase linearity at the expense of losing gain. 2. & 3. Positive feedback can result in large increases in gain until the increases becomes so large that oscillation occurs. 4. Positive or negative feedback at one frequency can result in enhanced or decreased response to that frequency.
voltage amplifier feedback current amplifier feedback transconductance feedback transresistance feedback
The thermal stability is the ability of the transistor to withstand changes in temperature without the transistor's parameters changing. Transistors generally have poor thermal stability and in particular the Beta parameter increases with temperaure, which can cause thermal runaway in a badly designed circuit. This is well known and the bias current in transistors is normally stabilised by the application of negative feedback in proper circuit design.
it is the amount by which instrument's sensitivity varies as ambient conditions change.
emitter follower is a type of negative feedback ,
Feedback can cause a lack of stability. However, negative feedback can actually reduce distortion, noise, and sensitivity to the noise.
What is meaning of Transformer sensitivity?
[1/(1+Ab)] is the expression for sensitivity...
Inhibitory feedback is not considered positive feedback; rather, it serves to dampen or reduce the activity of a system, promoting stability. Stabilizing feedback can be seen as a form of negative feedback, as it helps maintain equilibrium by counteracting disturbances. Positive feedback, on the other hand, amplifies changes and can lead to runaway effects or instability. Thus, inhibitory and stabilizing feedback mechanisms work to maintain balance, while positive feedback promotes further deviation from equilibrium.
posistive feedback
The sensitivity of an open loop control system is always 1, it is due to no feedback involved in open loop.
1.feedback in control system improves the speed of response2.using feedback in control system we can reduce the sensitivity of the system to parameter variation
A: Number one it provide stability for the amplifier or system. The greater the feedback the greater the stability but less gain. In other words gain is inversely related to feedback
Negative feedback in a noninverting amplifier results in improved stability and reduced drift.
In systems with positive feedback (or multiplier effects).
Positive feedback loops amplify changes or effects, leading to an increase in the output or a runaway process, such as during childbirth when contractions intensify. In contrast, negative feedback loops counteract changes, promoting stability by reducing the output or returning a system to its set point, like how the body regulates temperature. Essentially, positive feedback drives growth or escalation, while negative feedback fosters balance and homeostasis.
The stability of an operating point in a system is influenced by several factors, including feedback mechanisms, system dynamics, and external disturbances. Feedback can either enhance stability through negative feedback loops or destabilize it with positive feedback. Additionally, the inherent characteristics of the system, such as time constants and nonlinearities, play a crucial role in determining how it responds to changes. External factors, such as environmental conditions or operational variations, can also impact stability by introducing perturbations that shift the system away from its operating point.