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Feedback oscillators have a closed loop gain of
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Why open loop gain of op-amp is very high?
A; An ideal op amp should have infinite open loop gain so when the loop is closed with negative feedback it will be stable
What is the difference between finite open loop gain and closed loop gain?
In a closed loop system the gain without the feed back loop being closed is called open loop gain!!! e.g if forward gain is "A" and feed back factor is "B" then open loop gain is "AB" and closed loop gain will be [A/(A+B)]
What is a closed loop system?
A control system that appears to be self-regulating. Closed-loop systems employ feedback and a reference of correctness (norm or set point). Deviations from the norm are detected and corrections made in order to maintain a desired state in the system. Closed loop systems provide the homeostatic mechanism of many physiological functions (see negative-feedback) and also control some movement patterns, where feedback from proprioceptors and other receptors play an important part. Compare open-loop-system.
Why Positive Feedback can't use in Amplifier?
because +feedback amplify noise also.it amplify the noise to input ratio by[1/(1-G.H)]. WHERE g=open loop gain H=feedback gain
What is the circuit diagram of current series with closed loop gain?
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Feedback oscillators have a closed loop gain of?
unity
Is the gain same for same system in open loop and closed loop?
A: DEFINITELY NOT Open loop is defined as no feedback. any kind of negative feedback will reduce the gain
Why open loop gain of op-amp is very high?
A; An ideal op amp should have infinite open loop gain so when the loop is closed with negative feedback it will be stable
What is negative feedback of a closed loop system?
Negative feedback is a feedback where it is used in negative side in a closed loop system.Such as a inverting side feedback in op-amp.
What is the difference between finite open loop gain and closed loop gain?
In a closed loop system the gain without the feed back loop being closed is called open loop gain!!! e.g if forward gain is "A" and feed back factor is "B" then open loop gain is "AB" and closed loop gain will be [A/(A+B)]
Formulas of a unity-feedback loop?
The formulas of a unity-feedback loop are: Closed-loop transfer function: This is the ratio of the output of the system to its input in the closed-loop configuration. It is calculated by dividing the open-loop transfer function by (1 + open-loop transfer function). Closed-loop gain: This is the gain of the system in the closed-loop configuration and represents the amplification of the input signal in the system. It is calculated by multiplying the open-loop gain by (1 + open-loop gain). Closed-loop bandwidth: This is the frequency range over which the system can effectively respond to input signals in the closed-loop configuration. It is usually determined by the pole locations in the system's transfer function.
What is closed control?
In industry closed control is a closed loop feedback where a pump or motor has an encoder or feedback device to keep the operation regulated.
What makes closed-loop op amp unstable?
A: It does not. The loop becomes unstable ONLY if there is positive feedback either voltage or phase. For a close loop to be stable negative feedback is required.
What is a closed loop system?
A control system that appears to be self-regulating. Closed-loop systems employ feedback and a reference of correctness (norm or set point). Deviations from the norm are detected and corrections made in order to maintain a desired state in the system. Closed loop systems provide the homeostatic mechanism of many physiological functions (see negative-feedback) and also control some movement patterns, where feedback from proprioceptors and other receptors play an important part. Compare open-loop-system.
What about sensitivity of a closed loop system?
Sensitivity of a closed loop system for a change in the system gain is 1/(1+GH)
Why negative feedback is necessary in closed-loop control systems?
Feed back generated can be used to help alter the gain in the system to ensure marginal stability or critical damping
How are input and feedback parts of a system are related?
They are either in closed or in open loop system
