ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: fredrick on May 29, 2008, 10:16:15 am

Title: electronics
Post by: fredrick on May 29, 2008, 10:16:15 am

i dont know how to sketch output volatge graphs heres the question, help appreciated.

[IMG]http://img220.imageshack.us/img220/3204/89742380lo0.th.png[/img]

Title: Re: electronics
Post by: cara.mel on May 29, 2008, 10:53:56 am

Basically:
- Look at the input voltage for a point
- Use the graph to find the corresponding output voltage
- Join the dots together (it will keep the same period and the same shape, either sine or the pointy triangle one, unless it is clipped)

So for the first one:
When Vin is 0V, Vout is 4V
When Vin is -0.2V, Vout is 0V
When Vin is 0.2V, Vout is 8V

2nd and 3rd are similar
For the 4th one, when Vin is between -0.3 and -0.2, Vout is 0. Similarly, when Vin is between 0.2 and 0.3, Vout is 8

Picture demonstrating how to draw the hard one (I assume you have the answers to all of them somewhere)
(http://img.photobucket.com/albums/v711/happypuff/amplifier-1.jpg)
(yes I can't draw, pretend the lines kinda look like curvy where theyre supposed to be)

Title: Re: electronics
Post by: fredrick on May 29, 2008, 11:05:18 am

thanks! but when i apply the same thing you did when the first one i dont get the same answer as what the teacher got??

Title: Re: electronics
Post by: cara.mel on May 29, 2008, 11:09:56 am

This is the first one:

(http://img.photobucket.com/albums/v711/happypuff/Q1.jpg)

Is that what you got?

Title: Re: electronics
Post by: fredrick on May 29, 2008, 11:20:05 am

exactly! the answer had a range from 0 to 2 volts?! thanks a bunch