Apr 27, 2011 #1 H hamsiii Member level 2 Joined Apr 21, 2011 Messages 42 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,288 Activity points 1,595 I want to implement a current source to my circuit and I should do this by BJT. It should be Beta stable, Ic should not change with heat.
I want to implement a current source to my circuit and I should do this by BJT. It should be Beta stable, Ic should not change with heat.
Apr 27, 2011 #2 Prototyp_V1.0 Advanced Member level 2 Joined Apr 3, 2007 Messages 673 Helped 119 Reputation 238 Reaction score 83 Trophy points 1,308 Location Norway Activity points 5,103 Is this supposed to be a variable current supply? Then what should the input be?
Apr 27, 2011 #3 H hamsiii Member level 2 Joined Apr 21, 2011 Messages 42 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,288 Activity points 1,595 it should be a constant source and i have only +12Vdc supply.
Apr 27, 2011 #4 Prototyp_V1.0 Advanced Member level 2 Joined Apr 3, 2007 Messages 673 Helped 119 Reputation 238 Reaction score 83 Trophy points 1,308 Location Norway Activity points 5,103 Hi. This circuit is considering being quite stable.
Apr 27, 2011 #5 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,430 Helped 14,752 Reputation 29,786 Reaction score 14,105 Trophy points 1,393 Location Bochum, Germany Activity points 298,149 I would prefer a fully temperature compensated current source, e.g. a resistor degenerated current mirror.
I would prefer a fully temperature compensated current source, e.g. a resistor degenerated current mirror.
Apr 28, 2011 #6 H hamsiii Member level 2 Joined Apr 21, 2011 Messages 42 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,288 Activity points 1,595 thanks for your reply, i'll try that circuit now. current mirror is not preffered in our project, i first set up a mirror already.
thanks for your reply, i'll try that circuit now. current mirror is not preffered in our project, i first set up a mirror already.