公开(公告)号：US4516039A

公开(公告)日：1985-05-07

申请号：US343379

申请日：1982-01-27

申请人： Isokazu Matsuzaki ,  Akira Yamagiwa ,  Yutaka Watanabe ,  Takashi Matsumoto ,  Katsumi Yabe

发明人： Isokazu Matsuzaki ,  Akira Yamagiwa ,  Yutaka Watanabe ,  Takashi Matsumoto ,  Katsumi Yabe

IPC分类号： H03K19/086 ,  H03K19/013

CPC分类号： H03K19/086

摘要： A logic circuit (FIGS. 4A, 5A and 6A) comprises a current switch circuit (FIG. 4A) which has a non-threshold transfer characteristic (FIG. 4B), operates in non-saturation region, and is suited to a high speed operation.The current switch circuit is formed by a pair of transistors (6 or 7, and 8), one of which (6 or 7) receives an input signal at its base, and the other (8) has its base and collector connected in d.c. coupling to each other. The pair of transistors are connected with a common constant current source (9) at their emitters, deliver an output from their collectors, and are so biased as to operate in the non-saturation region.In the current switch circuit, due to the d.c. coupling between the base and the collector of the other transistor (8), the voltage level of the collector changes linearly in accordance with the input signal of the current switch circuit. This allows for a transfer characteristic having no threshold and a very small delay time between the input signal and the output signal. Moreover, the operation of transistors in the non-saturation region makes possible a logical operation which is high in speed and short in delay time.

摘要翻译： 逻辑电路（图4A，5A和6A）包括具有非阈值传递特性的电流开关电路（图4A）（图4B），在非饱和区域中工作，并且适合于高速 操作。 电流开关电路由一对晶体管（6或7和8）形成，其中一个晶体管（6或7）在其基极接收输入信号，另一个（8）的基极和集电极连接成直流。 相互耦合。 该对晶体管在其发射极处与公共恒流源（9）连接，从其集电极输出输出，并被偏置以在非饱和区域中工作。 在当前的开关电路中，由于直流 耦合在另一个晶体管（8）的基极和集电极之间，集电极的电压根据电流开关电路的输入信号线性变化。 这允许在输入信号和输出信号之间没有阈值和非常小的延迟时间的传输特性。 此外，在非饱和区域中的晶体管的操作使得可能的速度高和延迟时间短的逻辑运算。