Fitzpatrick, Cella, Harper & Scinto
Switching DC power supply apparatus
 A DC power supply apparatus includes a switching transformer having a switching element, a primary current detection circuit, arranged on a primary side of the transformer, for detecting a current flowing in the switching element, a secondary current detection circuit for detecting an output current from a secondary side of the transformer, and a control circuit for controlling the switching element on the basis of outputs from the primary and secondary current detection circuit. 
Canon Kabushiki Kaisha
H H
H02M H02H
inventional inventional
Takashi Masayoshi
Birumachi Saito