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Calculate the value of output voltageV(0...

Calculate the value of output voltage`V_(0)` and I if the Si diode and the Ge diode conduct at 0.7 V and 0.3V respectively, in the circuit given in Fig. If now Ge diode connections are reversed, what will be the new values of `V_(0)` and I.

Text Solution

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Refer to given circuit,
current, `I=(12-0.3)/(5kOmega)=(11.7V)/(5xx10^(3)Omega)=2.34mA`
Output voltage, `V_(0)=RI=(5xx10^(3))xx(2.34xx10^(-3))
=11.7V`
When the connections of Ge diode are reverse, then current will be through silicon.
In this case, `I=((12-0.7)V)/(5kOmega)=(11.3V)/(5xx10^(3)Omega)=2.26mA`
`V_(0)=IR=(2.26xx10^(-3))xx(5xx10^(3))=11.3V`
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