Time Response
It is apparent that the relative amplitude of the overshoot depends only on the damping factor. Now if k of the tow pole F.B amp is equal 1 then the tow poles are equal to each other and it is real negative, and the case is called critically damped case.
If k larger than unity then the tow poles of F.B amp is real and negative and the case is called over damping case where the response reach its steady after aperiod of time.
If k is smaller than unity then the tow poles are complex conjugate and the response is called under damping case where the response is first oscillate and then its amplitude decays with time until it reaches the steady state value. Underdamped amplifiers are not unstable systems, but nonetheless they are usually unacceptable, because overshoot arises in the time domain which is responsible for slow settling behavior.
To maintain peaking in both the frequency and step responses below a desired value, k must be properly set. In order to avoid excessive
underdamping, open-loop amplifiers must be designed with a dominant pole
and a second pole at a frequency higher than the gain-bandwidth product of the loop gain.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .