Can a series resonant circuit be used as an amplifier?

A series resonant circuit provides voltage magnification. A parallel resonant circuit can be used as load impedance in output circuits of RF amplifiers. Due to high impedance, the gain of amplifier is maximum at resonant frequency. Both parallel and series resonant circuits are used in induction heating.

Which circuit can be used as voltage amplifier and current amplifier?

Operational Amplifiers (Op-Amps): Another very important type, an op-amp is an integrated circuit that acts as a voltage amplifier, and has differential input. It has a positive and negative input, but a single output with very high gain. Originally, op-amps were created using valves.

Can we use transformer as amplifier?

Transformer is not an amplifier, because: The output and input powers are same and there is not any another source other than the signal (that is incoming AC voltage), Amplifier can amplify the signal voltage without reducing the output current.

What is need for tuned amplifier?

Tuned amplifiers are the amplifiers that are employed for the purpose of tuning. Tuning means selecting. Among a set of frequencies available, if there occurs a need to select a particular frequency, while rejecting all other frequencies, such a process is called Selection.

What is untuned amplifier?

Untuned Amplifier An untuned amplifier uses either a pure resistance or a complex impedance as the load impedance. Untuned amplifiers may be further subdivided into two categories: (i) audio frequency amplifiers and (ii) video frequency amplifiers.

What is an amplifier circuit?

It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals, producing a proportionally greater amplitude signal at its output. An amplifier is a circuit that has a power gain greater than one.

What is the difference between voltage amplifier and current amplifier?

The main difference between a voltage amplifier and a current amplifier is, voltage amplifier amplifies the voltage whereas the current amplifier amplifies the current. In other words, we can say the voltage amplifier provides higher voltage gain whereas the current amplifier provides higher current gain.

What is a voltage amplifier circuit?

A voltage amplifier circuit is a circuit that amplifies the input voltage to a higher voltage. So, for example, if we input 1V into the circuit, we can get 10V as output if we set the circuit for a gain of 10. Therefore, in this case, a voltage amplifier is built with all simple, discrete components.

What is voltage amplification principle?

Definition of voltage amplification : the ratio of the alternating voltage produced at the output terminals of an amplifier to the alternating voltage impressed at the input terminals.

Can we use step up transformers as voltage amplifier?

A Step Up Transformer cannot use for Amplification because if you are an Electrical Engineering student then you already know that a Step Up Transformer can increase only voltage, not power as it does not take any auxiliary power source.

What are the advantages of LCR circuits?

This voltage can be much larger than the external voltage applied to the circuit. LCR circuits are also useful to change the impedance of the circuit, to increase or decrease the resistance to the current of different frequencies.

Can a series LCR circuit be used as an inductor?

As shown in Module 6.1 and 6.2, the reactance of L and C depends on frequency, so if the frequency of the supply voltage V S is varied over a suitable range, the series LCR circuit can be made to act as either an inductor, or as a capacitor, but that’s not all.

What is the voltage across VR in LCR circuits?

In the LCR circuits, the internal and external resistance is usually there in the circuit. Therefore, it is easy to know that the voltage across VR is the total voltage across the circuit which inhibits the internal resistance L accompanied by a fixed resistor.

Does supply voltage lead or lag the supply current in LCR?

Looking at the phasor diagrams for a LCR series circuit it can be seen that the supply voltage (V S) can either lead or lag the supply current (I S) depending largely on the relative values of the component reactances, X L and X C . Fig 9.1.5 When VL and VC are equal the circuit is purely resistive.