# Calculate on some circuit

Discussion in 'Homework Help' started by woon_h88, Dec 4, 2009.

1. ### woon_h88 Thread Starter Active Member

Mar 25, 2009
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Any teacher out there? Got stuck when trying on some test paper..>.< Its on ic testing..really dont know how to get the correct answer...The answer was 3.648V...Anyone by chance can solve the problem?..>.<

2. ### Jony130 AAC Fanatic!

Feb 17, 2009
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Connect 10K resistor to the output, and then calculate Vo to this simplified schematics

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3. ### woon_h88 Thread Starter Active Member

Mar 25, 2009
46
2
hmm....may request a bit more help?..>.<...im kinda of dumb..i know the 1st step need to use voltage divider rule..(please correct me if im wrong)...after that i dont know what to do..>.<..sorry sorry...

4. ### Jony130 AAC Fanatic!

Feb 17, 2009
3,991
1,116
We have this schematics and form KVL we get
Vcc=V1+Vbe+Vd+Voh --->
Voh=Vcc-Vbe-Ud-V1=5V-0.6V-0.6V-V1=3.8V-V1
So for Ioh=0A then Uoh≈3.8V

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