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Old 4th November 2012, 01:51 PM   #1
diyAudio Member
Join Date: Aug 2012
Location: Germany near Munich
Default Problem with simulation Load Sensing Circuit


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

Attached Images
File Type: png Bildschirmfoto 2012-11-04 um 15.46.04.png (84.2 KB, 18 views)
File Type: png Bildschirmfoto 2012-11-04 um 15.44.52.png (31.0 KB, 18 views)
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Old 4th November 2012, 03:23 PM   #2
diyAudio Member
Join Date: Aug 2012
Location: Germany near Munich
Default 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.

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