Patent ID: 6297965
Filing Date: 2001-10-02
Classification: H05K,Y02P

Abstract:
A printed circuit board, comprising:at least one ground layer;at least one signal layer mounting thereon a plurality of active elements each implementing an integrated circuit having at least one power supply terminal;a common power source line;a plurality of first source lines each disposed for a corresponding one of said active elements, each of said first source lines having a first terminal connected to said power supply terminal of a corresponding one of said active elements and a second terminal connected to said common source line;a first capacitor having a first impedance at a specified frequency specified as an upper limit of a controlled frequency band and connected between said first terminal and said ground layer; anda second capacitor having a second impedance at said specified frequency and connected between said second terminal and said ground layer,each of said first source lines having at said specified frequency a characteristic impedance, which is not lower than three times said first impedance and said second impedance.