practical current source circuits capable of generating positive and negative current

[Analog_man]

Hello I am looking for a practical current source circuits capable of generating positive and negative currents.

 

[mojoman]

Re: Current source

If you want a practical circuit, check this out:
Voltage Controlled Current Source from **broken link removed**

 

[Kral]

Re: Current source

Analog_man,
Bob Pease article “What’s all this Current Source Stuff, Anyhow?”
. http://electronicdesign.com/Articles/Index.cfm?AD=1&ArticleID=18966
List of articles on Constant Current Sources:
. http://www.discovercircuits.com/C/constant.htm
Article on Bipolar Current Source
. **broken link removed**
Regards,
Kral