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constant current source using LM13700

Other Parts Discussed in Thread: LM13700

Hi dudes,

      i need to use the constant current source of 100 uA for the 200 k ohm load. which will vary with time in range of 190 k to 210 k. 

      i simulated in TINA tool for the application, that time i didn't get that of variation in current with the load variation. But, when i'm directly using LM13700 it is not giving satisfactory results as like simulation. then the problem is with the simulation tool or IC?.  I'm using the forward amplifier configuration as specified on datasheet..

      Can anyone suggest me what to do for this?

Thanks.