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An amplifier generally amplifies an AC waveform (such as sound), and is powered by a DC source. The majority of the power at the output is then coming from a DC source (the power supply in a power amplifier will convert the 50/60Hz AC power in to DC for the amplifier circuitry). So you can make the argument the above (question) is a true statement.
But an amplifier wouldn't be used to convert from DC to AC power (in general).
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoYes, but only if you already have the stronger current. A transistor is basically a switch which is activated by an electric current. AC (Alternating Current) can be amplified by using it to "switch" the transistor on and off, while applying DC (Direct Current) to the transistor. DC could be amplified as well, but you need a stronger current which will be switched off going into the transistor.
Wiki User
∙ 12y agoIt burns out!
If it is designed to run on 12 V dc and is fed 110v Ac or 220 V Ac... Then It gets too much voltage and burns out.
Alternatively if AC voltage is in the safe input range (lets say 12V ac) then if the power circuit has protective diodes then it will get a dc at 50/60 Hz on/off. Which means a LOT of noise and the device may not work as expected.
If no diodes then it will receive reverse polarity which in most cases is not good (burns out components).
Wiki User
∙ 8y agoAn amplifier needs a dc supply to allow the circuit to operate. A dc signal applied to the input will be blocked by the input capacitor, which is always included to prevent damage to the amplifier.
Wiki User
∙ 12y agoBy using a half wave or a FULL wave rectifier. The full wave rectifier achieves a smoother DC signal than the half-wave. Using filters to smooth the signal, pure DC can be achieved.
Wiki User
∙ 13y agono ac amplifier can not amplify the dc signals because dc signal is a constant value signal and it does consist positive and negative cycle and also capacitor blocks dc signal.
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What are the two basic configurations in operational amplifier?
opamp is a device used to amplify ac as well as DC input signals. It is called as operational amp becoz it is used to perform all mathematical operations. Symbol of opamp indicates the direction of current.
Why the common mode signal should be rejected in differential amplifier?
because of the coupling between the two transister and absence of capacitance it can amplify both dc and ac
Does the galvanometer measures AC and DC current?
It is used to detect very small DC currents only. For AC signals Detectors are used.
What purposes do electron tubes serve?
Electron tubes are used to manipulate electronic or electrical signals. They can be employed to convert AC to DC, amplify, attenuate, switch, mix, or generate audio or radio signals. Tubes have been mostly replaced by solid-state devices such as the transistor, but still have some applications in modern electronics.
Where is the ac amplifier located on 1999 Geo Tracker?
never heard of a ac amplifier
What is difference between ac and DC amplifier?
AC amplifiers are used to amplify AC signals and use components that handle large voltage values. DC amplifiers are used to amplify DC signals which use small powered electronic devices.
What type of signal to amplify by using differential amplifier?
ac and dc
What are the two basic configurations in operational amplifier?
opamp is a device used to amplify ac as well as DC input signals. It is called as operational amp becoz it is used to perform all mathematical operations. Symbol of opamp indicates the direction of current.
Why the common mode signal should be rejected in differential amplifier?
because of the coupling between the two transister and absence of capacitance it can amplify both dc and ac
What is chopper amplifier?
In a chopper type amplifier the dc i/p voltage is converted into an ac voltage, amplified by an ac amplifier and then converted back into a dc voltage proportional to the original i/p signal
What is wide band amplifier and detailed explanation?
A: All AC amplifiers will amplify a band of frequency lets say from DC TO 1 mega Hz that will be the band of frequency that this particular amplifier can amplify. A wide band amplifier is an amplifier that surpass this band to even higher frequency to lets say 500 mega Hz that will surely qualify it as a WIDE band amplifier. It is a name to describe an amplifier that has capabilities to reach higher frequency as opposed to a general op amp
What is amplidyne?
An amplidyne is a form of electromechanical amplifier in which an AC motor drives a DC generator.
What is an amplidyne?
An amplidyne is a form of electromechanical amplifier in which an AC motor drives a DC generator.
Why we use blocking and by pass capacitor in CE amplifier?
As the DC component in the signals are not required to be amplified, rather not required at times. Thus a blocking capacitor blocks this DC component from.entering the amplifier. Bypass capacitors are used at the emitter end so that the AC signal reaching the emitter end does not alter the biasing required to maintain the Q-point. All the above happens using the basic characteristic of a capacitor, that it blocks DC and passes AC.
Does the galvanometer measures AC and DC current?
It is used to detect very small DC currents only. For AC signals Detectors are used.
Is capacitors used to check the power supply output of a computer?
As you know a SMPS of a computer converts AC signals to DC signals. Here a capacitor is used to filter AC signals. eNjOy!!
What are Ac load lines in an amplifier and how they are drawn?
The dc load resistance is Rc but the AC Load resistance is (RcRl). If a load line is drawn the slope of which is -1(Rc Rl) . Then it is called an AC load line and it is to be used when the transistor is operating as an amplifier.
