0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What is the output impedance of common source amplifier circuit?
The output impedance of a common source amplifier circuit is typically high. This is because the common source amplifier uses a resistor to provide biasing, which results in a high output impedance. However, this can be mitigated by using a current source instead of a resistor for biasing.
Input impedance of current shunt feedback amplifier?
The input impedance of a current shunt feedback amplifier is the open loop impedance of the amplifier divided by 1+(A*beta)
What are typical values of input impedance and outoput impedance of ce amplifiers?
Output of the power amplifier is smaller 0.1 ohms and input of the loudspeaker is more than 4 ohms.
Can you use 8 ohm speakers on a 10 ohm radio?
Never haerd of a 10 ohm radio. There is no 10 ohm radio amplifier on the market, when you think that must be the output impedance of the amplifier. The output impedance of a radio amp is always less than 0.5 ohms. Scroll down to related links and go to "Voltage Bridging or impedance bridging - Zout < Zin"
Why input impedance should be high for an amplifier?
The best way to answer this question might be to consider the consequences if the input impedance was low: with a low input impedance, (signifficant) current would start flowing, and the amplifier would draw energy from the signal sources. None of the typical signal sources is designed to deliver energy on its outputs (after all, this is where the amplifier itself comes in). It is certainly possible to think that some of these sources might be changed to deliver some energy, but this is not the case with present-time tuners, CD players, microphones, and so forth. Assuming that the energy supply was not the issue, just to ponder this theoretical scenario a little further, the fact that current would flow from the source to the amplifier would also make the signal more vulnerable to the characteristics of the cable that connects the two. The high impedance of an amplifier input draws no energy, thereby avoiding these issues. It is the amplifier's task to convert a very low energy, voltage-driven signal into an higher energy output signal (driving the speakers which themselves have a very low impedance). ---- The way I typically think about this is to consider connecting a load to a Thevenin equivalent circuit [1]. The voltage across the load is given by the voltage divider formula (Vload = Vsrc * Rload/(Rload+Rthevenin)). If there is a very low load impedance--this means the amplifier has a very low input impedance--most of the source voltage will drop over the Thevenin equivalent resistance. With a very high input impedance, however, the majority of the signal voltage will be transferred from the source to the load because in the above equation, if Rload >> Rthevenin, Vload is approximately equal to Vsrc. if an amplifier has low impedance input the f/b must be low impedance also which make it in practical to use. The hi impedance of a typical amplifier is because the input is one two diodes basically operating on it exponential curve. Making it virtual the same as the other diode. for a differential amplifier. Boltzmann constant will define the impedance of a single diode.
In a multistage amplifier input impedance is high and output impedance is low justify the statement?
no. input impedance is low & output impedance is high
What is the output impedance of common source amplifier circuit?
The output impedance of a common source amplifier circuit is typically high. This is because the common source amplifier uses a resistor to provide biasing, which results in a high output impedance. However, this can be mitigated by using a current source instead of a resistor for biasing.
Will 4 ohm speakers work with a 6 ohm amplifier?
It's a myth. There is really no 6 Ohm amplifier on the market. And there never was. The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout
Will 6 ohm surround sound speakers work with an 8 ohm amplifier?
It's a myth. There is really no 8 Ohm amplifier on the market. And there never was. The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout
What happens if you connect 3 ohms impedance speakers to a 8 ohms impedancece amplifier?
Sorry, but there is really no amplifier on the market with 8 ohms output impedance. The output impedance of a power amplifier is always less than 0.5 ohms. We use no impedance matching. We use voltage bridging. Scroll down to related links and look at "Interconnection of two audio units - Power amplifier and passive loudspeaker".
What type of transformer configuration will you select to design a high input impedance and low output impedance amplifier?
main volage
Can an 8 ohm speaker be driven safely by a 16 ohm Guitar amp?
It's a myth. There is really no 16 Ohm guitar amplifier on the market. And there never was. The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout << Zin. That means the output impedance of the amplifier is much less than the input impedance of the loud speaker. The damping factor Df = Zin / Zout tells you what Zout is. Zout = Zin/Df. If the damping factor Df = 200 and the loudspeaker impedance is Zin = 16 ohms, the output impedance of the amplifier is Zout = 16 / 200 = 0.08 ohms. You see, there is no "16 ohm amplifier" on the market with a16 ohm output impedance. Scroll down to related links and look at "Voltage Bridging or impedance bridging - Zout < Zin".
Can i plug my 4 ohms Guitar amp into 16 ohms speakers?
That should be safe; although you won't get the best out of the loudspeakers. It's a myth. There is really no 16 Ohm amplifier on the market. And there never was. The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout << Zin. That means the output impedance of the amplifier is much less than the input impedance of the loud speaker. The damping factor Df = Zin / Zout tells you what Zout is. Zout = Zin/Df. If the damping factor Df = 200 and the loudspeaker impedance is Zin = 16 ohms, the output impedance of the amplifier is Zout = 16 / 200 = 0.08 ohms. You see, there is no "16 ohm amplifier" on the market with a 16 ohm output impedance. Scroll down to related links and look at "Voltage Bridging or impedance bridging - Zout < Zin".
Can you connect an 8 ohm head to a 4 ohm cabinet?
Sorry, there is no 4 ohm amplifier in the world. It's a myth. A loudspeaker amplifier has an output impedance of less than 0.5 ohm. In hi-fi we have always impedance bridging. Zout << Zin. That means the output impedance of the amplifier is much less than the input impedance of the loud speaker. The damping factor Df = Zin / Zout tells you what Zout is. Zout = Zin/Df. If the damping factor Df = 200 and the loudspeaker impedance is Zin = 4 ohms, the output impedance of the amplifier is Zout = 4 / 200 = 0.02 ohms. You see, there is no "4 ohm amplifier" on the market with a 4 ohm output impedance. Scroll down to related links and look at "Voltage Bridging or impedance bridging - Zout < Zin".
Can you wire a dvc 4 ohm sub woofer and a svc 8 ohm sub woofer together on a 4 ohm amp?
Sorry, but there is really no 4 ohm amplifier. We use only voltage bridging. The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout
If an amplifier has an output of 350 watts rms 8 ohms what is the output at 4 ohms?
There is no amplifier with an output impedance of 8 ohms or 4 ohms on the market. All audio amplifiers really have an output impedance of less than 0.1 ohms. Scroll down to related links and look at "Amplifiers, loudspeakers and ohms"
Will 8 ohm speakers work with a 4 ohm amplifier?
Yes, you can use 2 in series, IE daisy chain them to add up to 8 ohms.For stereo you would need 4 speakers not 2. mono, 2 not one.Most Amplifiers work OK driving to a lower impedance loads anyway so just hook them up. Very high power levels may overheat the amp but at normal volume it should be fine. Something important is added: There are no 8 ohm amplifiers! The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout
