公开(公告)号：US5825256A

公开(公告)日：1998-10-20

申请号：US853934

申请日：1997-05-09

申请人： Nikolay Tchamov ,  Petri Jarske

发明人： Nikolay Tchamov ,  Petri Jarske

IPC分类号： H03K3/282

CPC分类号： H03K3/2821

摘要： An emitter-coupled multivibrator circuit including a pair of main transistors (Q1,Q2) having a positive feedback, in which the base of each transistor is connected to the collector of the other transistor. A capacitor (C) is connected between the emitters of the main transistors. The circuit further comprises pull-down transistors (Q3,Q4), cross-connected so that they are positively driven to alternate between a conducting and a non-conducting state according to the states of the main transistors. The frequency of the oscillator is adjusted by controlling the current (Icon) passing through the capacitor (C). Additionally, a compensating current (I2) is arranged to flow through the collector resistors (Rc1,Rc2) of the main transistors so that the total current passing through each resistor is essentially constant and independent of the control current (Icon). This way the signal amplitude of the oscillator is not affected by the frequency control.

摘要翻译： 一种发射极耦合多谐振荡器电路，包括具有正反馈的一对主晶体管（Q1，Q2），其中每个晶体管的基极连接到另一晶体管的集电极。 电容器（C）连接在主晶体管的发射极之间。 该电路还包括交流连接的下拉晶体管（Q3，Q4），使得它们根据主晶体管的状态被正向驱动以在导通状态和非导通状态之间交替。 通过控制通过电容器（C）的电流（Icon）来调节振荡器的频率。 此外，补偿电流（I2）被布置成流过主晶体管的集电极电阻器（Rc1，Rc2），使得通过每个电阻器的总电流基本上是恒定的，而与控制电流（Icon）无关。 这样振荡器的信号幅度不受频率控制的影响。