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Coupling Devices | Resistance - Capacitance, Transformer, Direct coupling | Physics4students
Автор: Physics4students
Загружено: 2017-11-30
Просмотров: 1924
Описание:
The three coupling devices generally used are
(i) Resistance - Capacitance (RC) coupling
(ii) Transformer coupling
(iii) Direct coupling
RC coupling scheme consist of a series capacitor C and a parallel resistor R. C acts as a short circuit for ac signals while it behaves like an open circuit for dc signals. In transformer coupling scheme, the transformer ensures that the ac signal is transformed from the amplifier to the load, while at the same time, insulating the load from the dc signals. When dc signals have to be amplified, direct coupling is the simplest and the best to use.
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