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多行频同步显示器之所以能在变化范围很宽的多行频条件下实现自动同步,关键在于频率/电压转换电路 LM331N 具有零温度系数的精密基准电源,能精确地把不同频率的输入信号转变成相应幅度的输出控制电压加到行振荡级。1.多行频自动同步电路的工作原理(1)GW500显示器的多行频自动同步电路由IC201、IC202、C201～C204、R201～R215、VR201～VR204、Q201、D201和 R403等组成,如图1所示。
The reason why the multi-line frequency synchronous display can automatically synchronize under the multi-line frequency with wide range of change lies in the frequency / voltage conversion circuit. The LM331N precision reference power supply with zero temperature coefficient can precisely convert the input signals with different frequencies The output control voltage of the corresponding amplitude is added to the row oscillation level. 1. Multi-line frequency automatic synchronization circuit works (1) GW500 display multi-line frequency automatic synchronization circuit IC201, IC202, C201 ~ C204, R201 ~ R215, VR201 ~ VR204, Q201, D201 and R403 and other components, as shown 1 shown.