Output Swing

[sagh]

Can any one tell me what the output swing of an amplifier is? And what do we mean when we say the output swing is greater than 1 volt?

 

[ericgibbs]

Can any one tell me what the output swing of an amplifier is? And what do we mean when we say the output swing is greater than 1 volt?

hi,
Look here.
https://microchip.wikidot.com/asp0107:output-voltage-swing
E

 

[audioguru]

The output swing of an amplifier is its maximum AC peak-to-peak voltage. A sinewave with a power into an 8 ohm speaker of 50W is produced by an output voltage of 20V RMS which is a peak-to-peak output voltage swing of 56.6V.
An output voltage swing of 1V peak-to-peak is 35.4mV RMS.

 

[JimB]

An output voltage swing of 1V peak-to-peak is 35.4mV RMS.

You have dropped a decimal point there AG.
Should be 354 mV
JimB

 

[audioguru]

You have dropped a decimal point there AG.
Should be 354 mV
JimB

Thanks for correcting me.

 

[sagh]

In the circuit below if Vout=2v assuming Vdd is 2.5v, in this case can anyone tell me what is the output swing? (Vbias is 2v if needed)

 

[audioguru]

Your circuit with an N-channel Mosfet and a drain resistor and having a 2.5V supply should have its Vout at half the supply voltage (1.25VDC) for maximum output swing of 2.5V peak-to-peak if there is no load.
Since you want the Vout to be 2V then the maximum symmetrical output swing will be only 1Vp-p. Vbias depends on the Mosfet spec's.

 

[sagh]

Your circuit with an N-channel Mosfet and a drain resistor and having a 2.5V supply should have its Vout at half the supply voltage (1.25VDC) for maximum output swing of 2.5V peak-to-peak if there is no load.
Since you want the Vout to be 2V then the maximum symmetrical output swing will be only 1Vp-p. Vbias depends on the Mosfet spec's.

What do u mean by this: "Your circuit with an N-channel Mosfet and a drain resistor and having a 2.5V supply should have its Vout at half the supply voltage (1.25VDC) for maximum output swing of 2.5V peak-to-peak if there is no load". why would it be at the half of the supply voltage? Vdd is 2.5 v. why do you say "peak to peak" for that?

 

[Tony Stewart]

Sources may be single ended, bipolar, analog or digital. Each can "swing" or drive a certain load with a possible drop or rise according to the load voltage connection.

If you can figure out the swing on this circuit. when the switch opens and closes . This may be similar to the FET switch. Consider Vbat=10V for example.

 

[audioguru]

In the circuit below if Vout=2v assuming Vdd is 2.5v, in this case can anyone tell me what is the output swing?

There is no output swing since you say that Vout= 2V.

Please provide more details. Is the average Vout= 2V during an output swing? Or is the quiescent Vout= 2V? Do you want Vout to be the maximum symmetrical output?