| 摘要 |
PROBLEM TO BE SOLVED: To reduce useless oscillation waveform by providing means for connecting an waveform improving means between the receiving ends of first and second transmission lines. SOLUTION: A series termination resistor TR2 terminates a reflection wave returning from a third transmission line CB3 and has a characteristic impedance equal to that of the third transmission line CB3. The third transmission line CB3 is a coaxial cable having a characteristic impedance of 50Ω. First and second transmission lines CB1, CB2 have same line length and connected, at one ends thereof, with the third transmission line CB3 through a double impedance. As an waveform improving means, a fourth transmission line CB4 having a characteristic impedance equal to that of the first transmission line CB1 is employed and connected between the receiving ends of the first and second transmission lines CB1, CB2. When the fourth transmission line CB4 is connected, a circulation path passing through paths LP1, LP2 and returning back to the two branch point is formed and both paths LP1, LP2 have a perfectly identical propagation delay. |
