Define the term intrinsic stand-off ration in UJT, Physics

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Define the term intrinsic stand-off ration in UJT.  

Ans:  Intrinsic Stand-off Ratio: Equivalent circuit of a UJT is demonstrated in fig. (a). Emitter diode forms the junction of two internal resistances RB1 and RB2 connected in series. Where RB1= resistance of silicon bar between B1 and emitter junction. And RB2= resistance of silicon bar between B2 and emitter junction. Here inter-base resistance is given as:

RBB= RB1+ RB2

 

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