Help me choose better current source

Status
Not open for further replies.
D

demodb

Member level 4
Joined
Oct 4, 2005
Messages
69
Helped
4
Reputation
8
Reaction score
3
Trophy points
1,288
Activity points
1,844
current source

which one of these is better, if we look at component characteristics and power supply?
 

Re: current source

demodb said:
which one of these is better, if we look at component characteristics and power supply?
Click to expand...


If you'v read book or lecture of Allen,might you can find some .
 

Re: current source

The second one has higher output resistance, but worse compliance.
 

Re: current source

If you use the first one, when Vdd change the current will change. If you use a PNP transistor and a resistor connected to the grounded the variation are less, because the transistor absorb part of the variation and the resistor voltage remain quite constant.
 

Re: current source

thx, for the help guys. Did help me a lot.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…