| 摘要 |
PROBLEM TO BE SOLVED: To pass an ultra high-speed differential signal and make it difficult to pass a common mode noise. SOLUTION: A lumped-constant differential delay line DL is formed by arranging inductors Lo as passive series elements and capacitors as passive parallel elements, in a differential 4-terminal network of a ladder shape composed of the passive series elements and the passive parallel elements arranged in differential lines 1 and 3. The lumped-constant differential delay line DL has the capacitors serving as parallel elements and including two capacitors Co/2 and Co/2, or Co and Co equivalent in values to the capacitors, and connected in series. Inductors L1 to L4 for attenuating a common mode noise are connected between connection points T1-T4 of the capacitors Co/2 and Co/2 or Co and Co connected in series and a ground potential, so that attenuation poles are formed for attenuating the common mode noise together with the capacitors Co/2 and Co. COPYRIGHT: (C)2011,JPO&INPIT |
