Problem with simulation Load Sensing Circuit

[mantabernd]

Hello!

I try to simulate the load sensing circuit from Bob Cordells Book on Page 329 (see attachment).

So I added the parts in tina-ti and simulated it, but everytime the output voltage is about 7.4-7.6V

The voltage has to be much lower when less then 2,5 Ohms (R2) are connected.

The current at am1 is 10mA and the threshold is 2,5mV.

So now I need help, I don't get it... 🙁 Maybe someone here knows what to do 🙂

Thanks,
Bernhard

 

[mantabernd]

Solved!!

Problem is solved, I didn't connect the supply pins correctly 🙁

I thought pos. is on the upper and neg on the lower side of the symbol but that was wrong.

Thanks,
regards