What Is This Symbol? Like two circles overlapping

[dashxdr]

Can anyone tell me what the symbol is in the top of this schematic between the + power supply and the transistors?
https://www.linuxmotors.com/2096.png
Thanks!

 

[KlausST]

Hi,

It's a constant current source.

Klaus

 

[dashxdr]

It's a constant current source.

OK, that makes sense. Thanks!!!
-Dave

 

[ElectricalEngineering]

In your scenario it is constant current source as Kalus stated. Img:

Sometimes it might refer to a transformer (especially in power systems).