| 摘要 |
PURPOSE:To keep a delay angle constant at all times, by controlling the operating time of a monostable multivibrators in accordance with an input signal frequency. CONSTITUTION:A pickup (a) output is wave-shaped at a pulse converter (b) to be a rectangular wave. This rectangular wave is converted into a voltage depending on the frequency at an f-V converter (c) and applied to monostable multivibrators (d), (f). The circuit (d) is triggered at the front ridge of said rectangular wave and operated for a time in accordance with the output voltage of the f-V converter (c), and the output is applied to a gate (i) via an inverter (h), allowing to delay the front ridge of said rectangular wave by the operating time. The monostable multivibrator (b) is operated for the similar time at the rear ridge of said rectangular wave and the output is applied to a gate (g), allowing to delay the rear ridge of said rectangular wave by the operating time. |
