Integratable squarewave pulse oscillator
    3.
    发明授权
    Integratable squarewave pulse oscillator 失效
    可积分方波脉冲振荡器

    公开(公告)号:US4639692A

    公开(公告)日:1987-01-27

    申请号:US742052

    申请日:1985-06-06

    CPC分类号: H03K4/06 H03K3/0231

    摘要: A simple oscillator circuit is capable of generating a plurality of frequencies that are completely independent of one another, any one of which frequencies can be freely selected. The oscillator may be used as part of an electronic ringer for a telephone, for example. The oscillator circuit includes a capacitor which is charged from a current source. A discharge constant current circuit discharges the charge from the capacitor. A comparator compares the charge voltage on the capacitor with a first or a second reference voltage. In response to the output of the comparator, a reference voltage switching control circuit supplies the first or second reference voltage to the comparator and controls the turning on and off of the discharge constant current circuit. A control constant current source controls the current from the charge current source for charging the capacitor. The frequency of the output signal from the comparator is controlled by regulating the control constant current source to switch the current capacity of the charge current source.

    摘要翻译: 一个简单的振荡器电路能够产生完全独立于彼此的多个频率,任何一个频率都可以自由选择。 例如,振荡器可以用作电话的电子振铃器的一部分。 振荡电路包括从电流源充电的电容器。 放电恒流电路从电容器放电。 比较器将电容器上的充电电压与第一或第二参考电压进行比较。 响应于比较器的输出,参考电压切换控制电路将第一或第二参考电压提供给比较器并控制放电恒流电路的接通和关断。 控制恒流源控制来自充电电流源的电流以对电容器充电。 来自比较器的输出信号的频率通过调节控制恒流源来控制,以切换充电电流源的电流容量。