Rectifying circuit and switching power supply device having the same

A rectifying circuit comprising:

• a pair of input terminals at which an AC voltage appears;
• a plurality of first rectifying elements;
• a plurality of second rectifying elements;
• a first wiring pattern for connecting one of said paired input terminals to said plurality of first rectifying elements;
• a second wiring pattern for connecting the other of said paired input terminals to said plurality of second rectifying elements;
• a pair of output terminals at which a voltage produced by rectifying said AC voltage;
• and
• a third wiring pattern for connecting one of said output terminals to said plurality of first rectifying elements and said plurality of second rectifying elements,
• wherein said plurality of first rectifying elements and said plurality of second rectifying elements are laid out so that at least two boundaries between said first and second rectifying elements adjacent to each other are present.

A rectifying circuit comprising:

• a pair of input terminals at which an AC voltage appears;
• a plurality of first rectifying elements;
• a plurality of second rectifying elements;
• a first wiring pattern for connecting one of said paired input terminals to said plurality of first rectifying elements;
• and
• a second wiring pattern for connecting the other of said paired input terminals to said plurality of second rectifying elements,
• wherein said plurality of first rectifying elements and said plurality of second rectifying elements are laid out so that at least two boundaries between said first and second rectifying elements adjacent to each other are present, and
• wherein said first wiring pattern is formed with of a plurality of first unit wiring patterns formed on a multi-layered circuit board, and said second wiring pattern is formed with a plurality of second unit wiring patterns formed on said multi-layered circuit board.

A switching power supply device comprising:

• a switching circuit for converting DC input voltage into AC voltage;
• a rectifying circuit for rectifying said AC voltage, said rectifying circuit including a pair of input terminals to which said AC voltage is applied, a plurality of first rectifying elements, a plurality of second rectifying elements, a first wiring pattern for connecting one of said paired input terminals to said plurality of first rectifying elements, and a second wiring pattern for connecting the other of said paired input terminals to said plurality of second rectifying elements;
• and
• a smoothing circuit for smoothing output voltage from said rectifying circuit,
• wherein said plurality of first rectifying elements and said plurality of second rectifying elements are laid out so that at least two boundaries between said first and second rectifying elements adjacent to each other are present.

A switching power supply device comprising:

• a switching circuit for converting DC input voltage into AC voltage;
• a rectifying circuit for rectifying said AC voltage, said rectifying circuit including a pair of input terminals to which said AC voltage is applied, a plurality of first rectifying elements, a plurality of second rectifying elements, a first wiring pattern for connecting one of said paired input terminals to said plurality of first rectifying elements, and a second wiring pattern for connecting the other of said paired input terminals to said plurality of second rectifying elements;
• and
• a smoothing circuit for smoothing output voltage from said rectifying circuit,
• wherein said plurality of first rectifying elements and said plurality of second rectifying elements are laid out so that at least two boundaries between said first and second rectifying elements adjacent to each other are present, and
• wherein said rectifying element further comprises a pair of output terminals connected to said smoothing circuit, and a third wiring pattern for connecting one of said paired output terminals to said plurality of first rectifying elements and said plurality of second rectifying elements.