What are the values of Rf and V2 for the given circuit?

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Aprtaenl
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Homework Statement


Hello,

I am trying to Calculate The Resistance Rf and the value of the Voltage V2. The setup is a logarithmic Op amp connected to a differential Op amp. Both Op amps obey the Golden Rules.

Attached below is my attempt at the solution and the question.

Currently, I have an equation with three variables, and so i think i need potentially two more equations but do not know how to obtain these.

Any help would be appreciated

28907016_612090565801533_1525825119_n.jpg
 
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Perhaps you could provide a closeup image of the circuit diagram oriented in the correct way?

Edit: Also type out the problem statement. The text is all but unreadable in your image.
 
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I'll try rotating it and enhancing the contrast a bit...

Forum Opamp Logamp Circuit 01.jpg
Forum Opamp Logamp Circuit 01.jpg
 
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    Forum Opamp Logamp Circuit 01.jpg
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The text says

' In the Circuit below, the diode has a reverse saturation current Is= 10fA, a device factor n=1 and is operated at a temperature of 300K . Find values of resistance Rf and voltage V2 which will produce an output voltage.

Vout = ln (Vin)'