У нас вы можете посмотреть бесплатно Closed Loop Configuration of Operational Amplifier in English или скачать в максимальном доступном качестве, видео которое было загружено на ютуб. Для загрузки выберите вариант из формы ниже:
Если кнопки скачивания не
загрузились
НАЖМИТЕ ЗДЕСЬ или обновите страницу
Если возникают проблемы со скачиванием видео, пожалуйста напишите в поддержку по адресу внизу
страницы.
Спасибо за использование сервиса ClipSaver.ru
Closed Loop Configuration of Operational Amplifier Feedback Means some part of output is fed back to input The opamp that uses feedback is said to be in closed loop configuration Positive feedback Feedback signal(voltage or current) increases the input signal The output is in phase with input. Also called as direct or regenerative feedback It causes excessive distortion and instability, thus not used in amplifiers But it increases power of input signal, therefore used in oscillators Negative feed back It is used by Operational amplifiers In feedback some part of output is fed back to input. Rf introduces negative feedback in the circuit. The output 1800 out of phase w.r.t. input. Why we use Negative feedback in opamp? Negative feedback weakens the input signal and thus called as inverse or degenerative feedback. Negative feedback reduces the amplifier gain But to control and stabilize the gain we use negative feedback It also increases Bandwidth of amplifier Features of negative feedback It reduces and stabilizes the gain. Increases Bandwidth. Reduces non linear distortion Increase input resistance. Decreases output resistance. Improves frequency response Reduces noise Reduces the effect of variation in temperature and supply voltage on the output of opamp. Types of negative feedback Voltage series feedback Voltage shunt feedback Current series feedback Current shunt feedback Types of close loop configuration Inverting opamp (voltage shunt feedback opamp) Noninverting opamp (Voltage series feedback opamp) Buffer amplifier or unity gain buffer or voltage follower