cozturk
Advanced Member level 4
fixed current sources
input 5...55V output 250µA constant current circuit needed.
Total circuit current must be <=400µA
This is smilar basic circuit. But not enough for full input range. Output current has small changes depending on input voltage.
Your suggestions to modifiy this circuit ?
TL 431 etc not useful. because of it draws 1ma+ for regualtion.
input 5...55V output 250µA constant current circuit needed.
Total circuit current must be <=400µA
This is smilar basic circuit. But not enough for full input range. Output current has small changes depending on input voltage.
Your suggestions to modifiy this circuit ?
TL 431 etc not useful. because of it draws 1ma+ for regualtion.