Boost converter using an energy reproducing snubber circuit

A boost converter, comprising:

• an input having first and second input terminals;
• an output having first and second output terminals, said second output terminal connected to said second input terminal;
• a first inductor connected between said first input terminal and a first connection point;
• a first diode connected between said first connection point and said first output terminal, said first diode having a first orientation relative to said first output terminal;
• a second inductor connected between said first connection point and said first diode;
• a switching device connected between said first connection point and said second input terminal;
• and
• an unswitched resonant portion, comprising
• a capacitor connected between said first connection point and a second connection point;
• a second diode connected between said second connection point and said first output terminal, said second diode having a second orientation relative to said first output terminal the same as said first orientation;
• and
• a third inductor and a third diode connected in series between said second connection point and said second input terminal, said third inductor connected between said second connection point a third connection point, for serving as a resonant inductor, and said third diode being connected between said third connection point and said second input terminal.

A boost converter, comprising:

• an input having first and second input terminals;
• an output having first and second output terminals, said second output terminal connected to said second input terminal;
• a first inductor connected between said first input terminal and a first connection point;
• a first diode connected between said first connection point and said first output terminal, said first diode having a first orientation relative to said first output terminal;
• a second inductor connected between said first connection point and said first diode;
• a switching device connected between said first connection point and said second input terminal;
• and
• an unswitched resonant portion, consisting
• a capacitor connected between said first connection point and a second connection point;
• a second diode connected between said second connection point and said first output terminal, said second diode having a second orientation relative to said first output terminal the same as said first orientation;
• and
• a third inductor and a third diode connected in series between said second connection point and said second input terminal, said third inductor connected between said second connection point a third connection point, for serving as a resonant inductor, and said third diode being connected between said third connection point and said second input terminal.