| 摘要 |
PURPOSE:To maintain a vertical amplitude constant in spite of the change of the conditions of a periphery such as a high pressure fluctuation by connecting a correcting circuit and a voltage source or a current source for the correcting circuit to a ramp circuit. CONSTITUTION:When a high pressure is fluctuated, a correcting signal generated, along with the fluctuation, by a voltage source or a current source 5 for a correcting circuit is added through a correcting circuit 4 to an IC terminal 6 of the ramp circuit. Here, when the high pressure is fluctuated, the voltage or current of the voltage source or current source 5 is changed, the amplitude of the correcting signal is changed, a constant at the time of a discharge by a resistance 3 for a discharge is changed, the voltage waveform of the ramp circuit is changed, and the vertical deflecting quantity is made constant. Thus, in spite of the change of external factors such as the high pressure fluctuation, the fluctuation of the vertical amplitude can be suppressed. |
