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an RC coupled amplifier is basically used for voltage amplification , where the circuit

currents are quite low. higher currents & voltages would mean more dissipation in the

load resistors , which is essentially very lossy . The coupling amplitude to the next

stage is ideally the same as the previous stage signal excursion.

However if a transformer is used for coupling , both large voltages & current can be

handled without incurring the dissipation of a resistive load. Moreover a coupling

gain of the transformer primary to secondary ratio is also a bonus. also because of

the possiblity of correct impedance matching on the primary & secondary side

maximum power coupling is obtained. hence transformer coupling is more efficient

in such applications.

in high frequency applications transformer coupling , along with tuned circuits as

applicable is the choice circuit.

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No. In an amplifier, Power Out > Power in. In a transformer Power Out ~= Power In (minus internal losses). An AC generator is more like an amplifier than a transformer.


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Loading of Rc coupled amplifier occurs, if you doesnt use coupling capacitors...... If avoiding input coupling capacitor the amplifier will load the function generator.. For more details go to http://mycircuits9.blogspot.com


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A big difference. A transformer converts power into more useful means of transportation or matching to the end results.Pincoming = IPVP = Poutgoing = ISVS.giving the ideal transformer equationVs/VP= Ns/NP=IP/Isthen as the outgoing voltage of the transformer increase, the outgoing current will decrease. An amplifier adds power. For example, voltage amplifier add voltage (amplify) independent the amplifier current.


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A double wound transformer has two separate windings (primary and secondary) that are magnetically coupled, allowing for electrical isolation between the input and output circuits. In contrast, an auto transformer has a single winding that acts as both the primary and secondary, with part of the winding shared between them, which means it provides no electrical isolation. This design makes auto transformers more compact and efficient for certain applications, but they are less versatile in terms of voltage transformation and safety.


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I am currently designing a planar transformer for a switch-mode power supply. From what I understand, planar transformer is better than a normal transformer due to its shape. It utilises flat E ferrite cores and winding tracks which saves space and is more compact for a power supply. It also has lower leakage inductance which makes it more efficient.

Related Questions

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Sounds more like a "homework" or "test" question, rather than a real-world question, and vague, at that! Could you re-phrase your question in a better, more-precise context, or check it for typos? Right now, your question seems to ask "What's the advantage of using a transformer, instead of using a transformer-coupled circuit?"...which makes no sense, since a "transformer-coupled circuit" USES a transformer.


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