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negative resistor realization?

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iamxo

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negative resistor

can anyone help me?

I know positive feedback is a realization, but if I want to use fully differential structure, is it the same as single ended?
 

You can use a differential cross coupled pair, i.e 2 transistors with their sources connected together and biased with same current source and the drain of each transistor connected to the base of the other one. You can refer to "RF microelectronics" by Razavi, the oscillators chapter for more details.
 

I am having a little problem understanding your question. please explain more
 

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