公开(公告)号：US4336527A

公开(公告)日：1982-06-22

申请号：US190238

申请日：1980-09-24

Applicant: Frithjof von Sichart ,  Wolf Springstubbe

Inventor： Frithjof von Sichart ,  Wolf Springstubbe

IPC: H03M1/78 ,  H03M1/00 ,  H03M1/66 ,  H03K13/02

CPC classification number: H03M1/68 ,  H03M1/785

Abstract: An R-2R-ladder network has n chained ladder cells, each controlled by an associated one of n control circuits wherein n corresponds to the number of digits of a digital signal to be converted. Each cell is composed of a series transistor inserted between two neighboring nodes of the ladder network and of a first, a second and a third cross transistor. The cross transistors are commonly connected by one main electrode to form a star circuit. The first, second and third cross transistors are connected by a second main electrode to the node of the cell, to a sum current output line and to ground, respectively. The gates of the series transistor and of the first cross transistor are directly connected to a reference voltage source whereas the gates of the second and the third cross transistor of each ladder cell are connected to a respective one of two signal outputs of the associated control circuit. Each control circuit has a signal input for receiving a digit of the digital input signal dependent upon which state the control circuit is operated to shunt the reference voltage alternatively to one of both signal outputs.

Abstract translation: R-2R梯形网络具有n个链接梯形图单元，每个梯形图单元由n个控制电路中的相关联的一个控制，其中n对应于要转换的数字信号的位数。 每个单元由插入梯形网络的两个相邻节点之间的串联晶体管和第一，第二和第三交叉晶体管组成。 交叉晶体管通常由一个主电极连接以形成星形电路。 第一，第二和第三十字晶体管分别通过第二主电极连接到电池的节点，并联到和电流输出线和地。 串联晶体管和第一交叉晶体管的栅极直接连接到参考电压源，而每个梯形电池的第二和第三十字晶体管的栅极连接到相关联的控制电路的两个信号输出中的相应一个 。 每个控制电路具有用于接收数字输入信号的数字的信号输入，这取决于控制电路的操作状态，以将参考电压替换为两个信号输出之一。

公开(公告)号：US4351985A

公开(公告)日：1982-09-28

申请号：US27354

申请日：1979-04-05

Applicant: Max Schlichte ,  Wolf Springstubbe

Inventor： Max Schlichte ,  Wolf Springstubbe

IPC: H04Q3/00 ,  H04Q11/04 ,  H04Q3/52

CPC classification number: H04Q11/04 ,  H04Q3/0012

Abstract: A coupling system for a telecommunication exchange installation is described having a plurality of interconnected binary switching matrices. Each switching matrix has at least two row and two column lines with means for connecting row lines to column lines. A plurality of connection lines form input and output lines for the system of interconnected switching matrix. The interconnection arrangement for the interconnected switching matrices is such that a row line of at least one multiple is connected to a row line of another multiple or a connection line. The other row line of the one switching matrix is connected to a column line of another switching matrix or to a connection line. One column line of the one switching matrix is connected to a column line of another switching matrix or to a connection line. The other column line of the one switching matrix is connected to a row line of another switching matrix or to a connection line.

Abstract translation: 描述了一种用于电信交换设备的耦合系统，具有多个互连的二进制开关矩阵。 每个开关矩阵具有至少两行和两列具有用于将行线连接到列线的装置的列线。 多个连接线形成用于互连交换矩阵系统的输入和输出线。 用于互连的交换矩阵的互连布置使得至少一个多个的行线连接到另一个多个或连接线的行线。 一个开关矩阵的另一行线连接到另一个开关矩阵的列线或连接线。 一个开关矩阵的一列连接到另一个开关矩阵的列线或连接线。 一个开关矩阵的另一个列线连接到另一个开关矩阵的行线或连接线。