| 摘要 |
PURPOSE:To eliminate blinking of display in the low rotational speed of the engine by adding a pair of diodes connected in parallel with opposite polarity and a smoothing capacitor. CONSTITUTION:Diodes 8 and 9 connected in parallel with opposite polarity and a smoothing capacitor 10 are added between an LPF301 and an electronic type display 6. An ignition signal from an input terminal 1 is fed to a one-shot circuit 2 to obtain a fixed pulse output (a) with the pulse width DELTAt and the height V. This output (a) is outputted as signal (b) containing a ripple portion VR passing through the LPF301. Then, after the removal of the ripple portion VR with the diodes 8 and 9 and the smoothing capacitor 10, the signal (b) is fed to the display 6 as signal (c). This can eliminate blinking of display even in the low rotational speed of the engine. |
