US Patent 7453257 System and method for precision current source

Systems and methods of the present disclosure, in accordance with one or more embodiments, include a current source adapted to provides volts*sec at a fixed frequency, a magnetic core adapted to be saturated with energy, and a control winding around the magnetic core. The control winding is adapted to receive current from the current source to saturate the magnetic core. A control circuit is adapted to selectively provide additional volt*sec for at least one half of a cycle of the fixed frequency to the control winding. A second winding around the magnetic core provides a load current to a load through desaturation of energy stored in the magnetic core.