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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?
Your mom's awesome!! HAAHAHAHAH I m just kidding BRO ....
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 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 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.
Formulas of a unity-feedback loop?
In general, the transfer function of closed loop system is (Y/X)=G*K/(1+G*K*H) ----- negative feedback (Y/X)=G*K/(1-G*K*H) ----- positive feedback where G- transfer function of the plant 0r system K - controller H - feedback transfer function Y-output in laplace domain X-reference in laplace domain so the transfer function of the closed loop system with unity feedback is so H=1(unity) (Y/X)=G*K/(1+G*K) ------- negative feedback (Y/X)=G*K/(1-G*K) ------- positive feedback if u couldn't understand notify me... i will improve it
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)
What is the physical significance of infinite open loop voltage gain of an ideal operational amplifier?
Distortion is estimated as closed loop gain divided by open loop gain. If the open loop gain approaches infinity, distortion approaches zero.
What is nominal gain?
It is the ratio between the output over input. It is actually the theoretical gain. Say for closed loop gain, based on given resistor values R1 10ohms and R2 100ohms , nominal gain will be -R2/R1= -10 V/V while the actual closed loop gain is could actually be -9.999944 V/V. Moreover, nominal gain would usually refer to the closed loop gain, the open loop gain would have much bigger value.
