0
Negative feedback in an op amp is used to place the op amp in closed loop mode, so that it can actually control a process, such as motor speed. The op amp senses a change in the system, and the negative feedback serves to reverse the signal controlling the system, thereby stabilizing it. Usually, the feedback is tied into a reference bridge of some sort, so that an input can control the system. A very trivial example of a closed loop system is the thermostat controlling the heat in your house. There is a reference setpoint - your desired temperature - and the output is either on or off - causing the furnace to either run or not run. Due to the thermal inertia of your home, this is enough to maintain the desired temperature without unneeded cycling of the furnace. This delay phenomonen is why many op amp circuits have RLC or some kind of filtering, making the overall closed loop behavior be stable, i.e. not oscillate. In the case of the furnace, some thermostats have what is called an anticipator which turns the furnace off before it reaches the setpoint, so that the resulting temperature does not overshoot.
Add your answer:
Earn +20 pts
What is the purpose of a comparator?
The main purpose of a comparator is the conversion of ADC(analog to digital conversion). In its input two supply voltages are applied and their differnce determines either a high or low signal of digital signal like to make which bit is high and which is low in the form of V++ and V--. If the diffrence between the two voltages is greater means positive the output will be V++ and if lower means negative the output is V--.
What is the main function of diode?
the main function of the diode is to allow current to flow in just one direction and oppose the flow of current in negative direction.In short diode rectifies the current..
What causes a meter to read negative voltage across a DC motor?
The main cause for a meter to read negative voltage across a DC motor is a loose ground wire. The ground wire can be loose or may need to be cleaned.
Why closed loop control system is much stable than open loop control system?
A Closed loop system basically will have a feedback which enables the rectification of the error in the main process,whereas it is not possible in an open loop system
What is the purpose of the holding circuit in a magnetic motor starter?
It hold the main contacts closed until the control circuit through the interlock is broken.
What is the main general purpose of negative feedback?
The main general purpose of negative feedback is to maintain stability and accuracy in a system by reducing any deviation from a desired set point. It helps to regulate and control the system's output to keep it within acceptable limits.
What is the main characteristic that demonstrates a negative feedback?
The main characteristic of negative feedback is that it works to counteract or reduce a change in a system, maintaining balance or stability. It acts to reverse the direction of the change, helping to regulate and maintain homeostasis.
Types of feed back?
In sociology, the two main types of feedback are positive and negative. An example of positive feedback would be receiving an A+ on a paper one has studied hard for. Negative feedback would be to receive a poor grade in a test the person hasn't studied for.
What is the main characteristic used to identify a negative feedback mechanism?
The main characteristic of a negative feedback mechanism is that it works to maintain homeostasis by counteracting changes in a system. When a parameter deviates from its set point, the mechanism activates to bring the parameter back to its normal range, thus stabilizing the system.
What is a scientific assessment?
A scientific assessment is a process. Its main purpose is to widen the students learning abilities through an effective feedback based on the studentsÕ performance.
Types of feedback?
1- Simple FBI 2-Multiple FBI "Isozyme Forms" 3-Concerted FBI 4-Cumulative FBI5-Cooperative FBI
What are the main kinds of feedback?
advice
What does the pituitary gland does for the brain?
The pituitary gland is located at the base of the brain and serves the main purpose of a neuroendocrine regulator of several different hormonal systems. Its main purpose is to release stimulating hormones that regulate the adrenal, thyroid, and other endocrine glands. It works by use of a feedback loop from these downstream organs.
How do you connect Behringer Feedback Destroyer to mixer?
mixer main out TO behringer feedback destroyer input TO speakers
What was the main purpose of the crusades?
the main purpose of the crusades was to be themselves
What was the main purpose of the Crusade?
the main purpose of the crusades was to be themselves
What are the main of communication?
the main four elements of communication are 1. Sender2. Message3. Receiver4. Feedback.
