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mitxstudent
 3 years ago
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
mitxstudent
 3 years ago
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

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morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3Hi, 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

mitxstudent
 3 years ago
Best ResponseYou've already chosen the best response.0how do i work out rd sorry

nick67
 3 years ago
Best ResponseYou've already chosen the best response.0did you check here: http://openstudy.com/study#/updates/5062c622e4b0da5168bd6c57 it's quite similar

mitxstudent
 3 years ago
Best ResponseYou've already chosen the best response.0i did but there wasnt a visible formula i could use

morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3RD should be 1, value taken from the graphic. Did my answers were correct?

nick67
 3 years ago
Best ResponseYou've already chosen the best response.0noise value is: vo = vi*Rz/(Rz+Rin), where Rz is 1 Ohm

mitxstudent
 3 years ago
Best ResponseYou've already chosen the best response.00.000055 was right for 4k but not 2k

nick67
 3 years ago
Best ResponseYou've already chosen the best response.0the noise output with zener is quite not dependent by the load

nick67
 3 years ago
Best ResponseYou've already chosen the best response.0as far as the Rload is much higher than Zener resistance, load contribution to vo calculation is negligible

morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3hmmm it should be almost the same, try close values :0.000054, 0.000056 should be fine

mitxstudent
 3 years ago
Best ResponseYou've already chosen the best response.0iv attached a print screen so you can see if i have done summit wrong

nick67
 3 years ago
Best ResponseYou've already chosen the best response.0I was talking about values with Zener in

nick67
 3 years ago
Best ResponseYou've already chosen the best response.0with RL 2K vo about 54.92 uV, with RL 4K vo about 54.93 uV

morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3oooohh 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?

mitxstudent
 3 years ago
Best ResponseYou've already chosen the best response.0yes 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

nick67
 3 years ago
Best ResponseYou've already chosen the best response.0without Zener, vo is 36.67 mV for RL = 2k and 44 mV for RL = 4K

morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3The formula for RL is : Vin*RL/(RL+Rin)>=5V

morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3Try 580590 value, ok?

mitxstudent
 3 years ago
Best ResponseYou've already chosen the best response.0thank you for the help mate best respone and this has probably helped alot of others that have been stuck on this one

morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3so it's everything ok now?

wuzupdawg
 3 years ago
Best ResponseYou've already chosen the best response.0uhhhh how did you find V0 (capital V)

morpheous87
 3 years ago
Best ResponseYou've already chosen the best response.3Try 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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