Electronic apparatus reducing generation of electro magnetic interference

In an electronic apparatus having a printed circuit board including a circuit for inputting and outputting electric signals between an external apparatus separate from said electronic apparatus and an internal circuit on the printed circuit board through a connector, the circuit for inputting and outputting signals comprising:

• a first conductive pattern electrically connecting the connector and the internal circuit on the printed circuit board;
• a second conductive pattern connected to a ground potential;
• and
• a condenser connected between the first conductive pattern at a point of contact and the second conductive pattern, wherein a portion of the first conductive pattern between said point of contact with said condenser and said connector is wider than a portion of the first conductive pattern between said point of contact with said condenser and said internal circuit on the printed circuit board.