公开(公告)号：US3593296A

公开(公告)日：1971-07-13

申请号：US3593296D

申请日：1969-04-28

Applicant: INT STANDARD ELECTRIC CORP

Inventor： GIRARD PIERRE ,  LEGER MARC JEAN PIERRE ,  LEROUGE CLAUDE PAUL HENRI ,  JEAN JACQUES HENRI DE

IPC: H03K3/356 ,  H03K17/693 ,  H04Q3/52

CPC classification number: H04Q3/521 ,  H03K3/356017 ,  H03K17/693

Abstract: An electronic multiselector employs metal-oxide-silicon FET transistors in logic circuits comprising NOR gates and inverters. Horizontal selection signals are delivered by a shift register which provides line scanning in a selection stage.

公开(公告)号：US3537100A

公开(公告)日：1970-10-27

申请号：US3537100D

申请日：1967-01-25

Applicant: INT STANDARD ELECTRIC CORP

Inventor： BARJOT MICHEL FRANCOIS ,  CHATELON ANDRE EDOUARD JOSEPH ,  GIRARD PIERRE

IPC: H04J3/06 ,  H04L7/033 ,  H04L25/49 ,  G06F5/00

CPC classification number: H04L7/033 ,  H04J3/0617 ,  H04L25/49

公开(公告)号：US3586968A

公开(公告)日：1971-06-22

申请号：US3586968D

申请日：1969-03-06

Applicant: INT STANDARD ELECTRIC CORP

Inventor： BARJOT MICHEL FRANCOIS ,  CHATELON ANDRE EDOUARD ,  GIRARD PIERRE

IPC: H04B17/40 ,  H04J3/14 ,  H04B3/46 ,  G01R31/08

CPC classification number: H04J3/14 ,  H04B17/408

Abstract: In a PCM communication system including a transmission line having a plurality of repeaters therealong, one at the end of each section of the line, a fault is located as follows. A repetitive code having a fundamental frequency F is propagated over the line from a transmitting station. A different detector responsive to frequency F is coupled to the output of each repeater. Each of the detectors is coupled to a different pulse generator. The pulse generators, before a fault responds to the detected frequency F to generate rectangular pulses having a given amplitude and a frequency F. These pulses are coupled to a supervisory transmission line without repeaters. At the receiving station measuring equipment detects the amplitude of the rectangular pulses on the supervisory line. The detected amplitude locates the fault. Where the communication system includes a plurality of main transmission lines, each pulse generator is common to the repeaters of a corresponding section of each of the main lines.

公开(公告)号：US3886322A

公开(公告)日：1975-05-27

申请号：US29938572

申请日：1972-10-20

Applicant: INT STANDARD ELECTRIC CORP

Inventor： COLARDELLE JOEL SERGE ,  GIRARD PIERRE ,  LEROUGE CLAUDE PAUL HENRI

IPC: H04B1/58 ,  H04L25/22 ,  H04M19/00 ,  H04Q3/52

CPC classification number: H04Q3/521 ,  H04B1/586 ,  H04L25/22 ,  H04M19/005

Abstract: A circuit is disclosed for use in data switching wherein a twowire to four-wire conversion (''''hybrid'''' function) is performed by all-electronic means. These means comprise one complementary symmetry differential amplifier with emitter coupling per direction of transmission with adequate provision for minimizing interaction between both directions. Means are also provided for minimizing inter-line and inter-junctor crosstalk by supplying lines and junctors through active ''''gyrators'''' equivalent to series inductances.

Abstract translation: 公开了一种用于数据交换的电路，其中通过全电子方式执行双线至四线转换（“混合”功能）。 这些装置包括一个互补对称差分放大器，每个传输方向具有发射极耦合，并具有足够的设置，以最小化双向交互。 还提供了用于通过相当于串联电感的主动“回转器”提供线路和接头来最小化线间和串联串扰的装置。

公开(公告)号：US3689710A

公开(公告)日：1972-09-05

申请号：US3689710D

申请日：1970-10-12

Applicant: INT STANDARD ELECTRIC CORP

Inventor： COLARDELLE JOEL SERGE ,  GIRARD PIERRE ,  LENOUGE CLAUDE PAUL HENRI

IPC: H04B1/58 ,  H04Q3/52

CPC classification number: H04B1/581 ,  H04B1/586 ,  H04Q3/521

Abstract: In a two-wire to four-wire data switching center, the usual hybrid transformer(s) is replaced by a single transformer with a symmetrical secondary. Interaction between both directions of transmission is avoided by connecting the extremities of the secondary respectively to the output of a first current amplifier and to the input of a second current amplifier. This circuit is intended specifically for use with electronic switching such as that using MOS switching crosspoints and stages.

Abstract translation: 在二线到四线数据交换中心，通常的混合变压器由具有对称次级的单个变压器代替。 通过将次级的四极分别连接到第一电流放大器的输出和第二电流放大器的输入来避免传输的两个方向之间的相互作用。 该电路专门用于电子开关，例如使用MOS开关交叉点和级的电路。

公开(公告)号：US3579232A

公开(公告)日：1971-05-18

申请号：US3579232D

申请日：1969-04-23

Applicant: INT STANDARD ELECTRIC CORP

Inventor： GIRARD PIERRE ,  LEROUGE CLAUDE PAUL HENRI ,  REGNIER MARC ANDRE

IPC: H03M1/00 ,  H04B14/04 ,  H03K13/04

CPC classification number: H04B14/048 ,  H03M1/00 ,  H03M1/50

Abstract: A digital to analog decoder or converter is disclosed. The decoder has a smooth nonlinear characteristic of the hyperbolic sine type. This smooth characteristic is contrasted to a nonlinear characteristic approximated by a plurality of straight line segments in the prior art. The decoder of this case includes a register to store a 7-digit code to be decoded. A first decoder circuit decodes the last four digits of the 7-digit code. Two groups of current generators (a first selection circuit) responding to the output of the first decoder produce two currents. A bipolar inverter (a second selection circuit) responding to the first of the last four digits directs the two currents to a third selection circuit. The third selection circuit responds to the output of of a second decoder to direct the two currents to the appropriate one of two ladder attenuators, the outputs of which produce the analog signal. The second decoder responds to the first three digits of the 7-digit code.