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This problem studies such effects and how a Zener diode may be used to ameliorate the problem. Assume that VI=13.5V, RIN=1 kΩ, and vi=55.0mV. how do i workout the value of vo

MIT 6.002 Circuits and Electronics, Spring 2007
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Hi, this worked for me - vo=vin/Rin *(RD*RL)/(RD+RL) so Try this values for both vo : 0.055/1000* (1*2000)/(2001) So for both RL 2k and 4k you should have ~ 0.000055
how do i work out rd sorry

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Other answers:

i did but there wasnt a visible formula i could use
RD should be 1, value taken from the graphic. Did my answers were correct?
noise value is: vo = vi*Rz/(Rz+Rin), where Rz is 1 Ohm
0.000055 was right for 4k but not 2k
the noise output with zener is quite not dependent by the load
as far as the Rload is much higher than Zener resistance, load contribution to vo calculation is negligible
hmmm it should be almost the same, try close values :0.000054, 0.000056 should be fine
iv attached a print screen so you can see if i have done summit wrong
1 Attachment
I was talking about values with Zener in
with RL 2K vo about 54.92 uV, with RL 4K vo about 54.93 uV
oooohh this is the first part, where there isn't zener. The formula is a bit different here. Try these values: for 2k - 0.037 and for 4k 0.044 is it ok?
yes you both are life savers i was stuck on this for the past 9 hours one last question is how do we work out the minimum rl
without Zener, vo is 36.67 mV for RL = 2k and 44 mV for RL = 4K
The formula for RL is : Vin*RL/(RL+Rin)>=5V
Try 580-590 value, ok?
thank you for the help mate best respone and this has probably helped alot of others that have been stuck on this one
so it's everything ok now?
uhhhh how did you find V0 (capital V)
Try this if you are asking about the first part - VO=VI*RL/(RL+RIN) If not give more info what you need.

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