Output Voltage

[t[-_-]t]

Hey guys, how would you draw the output voltage onto a graph?

[Mr. Study]

Hey,

It depends on what the input and amplifier is.

Lemme update this in a few moments.

EDIT: Okay.

Look at this image of an amplifier and the input signal:



Notice the amplifier. If we place an input voltage of 60 or more mV, the output voltage will always be 3V.

Also, note that the amplifer has a negative gradient and will invert the outpute voltage. So 'flip' the inpute voltage.

Think about this, from time intervals 0.125 to 0.375, the input voltage is going from 60 to 100 to 60 volts. What will happen to the output voltage?

Well, Since we know that anything higher than 60 will always be 3V, we can represent this time interval as a straight line.

Now from time intervals 0.375-0.625, the input voltage is changing from 60mV to -60mV. So from this time period, the output voltage will be changing. Since it's inverted, it will go from -3 to +3 and it repeats itself.

Note: The frequency of the signal does not change/

.

Hope that was a good explanation.

[t[-_-]t]

Okay sweet

[t[-_-]t]

Thanks

[nina_rox]

Just on these questions, how to you find the gain from just the output and input graphs? There is a question on one of the exams where the input is drawn and only half the output (can't really tell what the peak is at) so how can I find the gain?

EDIT: Okay so I kind of understand how to find the gain now do you just go RMS Vout / RMS Vin? Would you do the same for a clipped graph (for the two graphs above)?

Also does the output graph tell us if it is inverting or non-inverting or is there a another way to tell besides looking the the vout/vin graph?