| 摘要 |
PROBLEM TO BE SOLVED: To provide a shaping circuit by which a voltage level of a transmission line is kept stable and a voltage change width of the transmission line is reduced to reduce noise radiation or the like even when a transmission signal is unstable. SOLUTION: An input terminal of a noninverting buffer 2 is connected to a digital signal transmission line 1 and a series circuit consisting of 1st and 2nd impedance elements 3, 4 connects to an output terminal and an intermediate connecting point is connected to the digital signal transmission line 1. When a transmission signal reaches an unstable state from a low level, the digital signal transmission line 1 is pulled down via the 1st and 2nd impedance elements 3, 4. When the transmission signal is at a high level, the voltage level of the digital signal transmission line 1 does not reach the power supply voltage by the series connection of the 1st and 2nd impedance elements 3, 4. |
