公开(公告)号：US3920917A

公开(公告)日：1975-11-18

申请号：US44634074

申请日：1974-02-27

Applicant: TELECOMMUNCATIONS CIT ALCATEL

Inventor： ROY MARIE-ANNICK

IPC: H04J1/14 ,  H04L5/06 ,  H04L27/12 ,  H04J3/00

CPC classification number: H04L27/122 ,  H04J1/14 ,  H04L5/06

Abstract: A modulator effects a series of filtering operations on successively scanned telegraphic signal channels. For this purpose a scanner scans the telegraphic signal channels and provides an output to a digital filter having a series of filter sections which are supplied with signals according to prescribed filter coefficients. These coefficients are stored in memories to be applied to the filter sections depending upon the state of each channel at the time it is scanned. The output of the digital filter is converted into analog format for transmission.

公开(公告)号：US3912870A

公开(公告)日：1975-10-14

申请号：US42268173

申请日：1973-12-07

Applicant: CIT ALCATEL

Inventor： ROY MARIE-ANNICK

IPC: H04J1/05 ,  H04J4/00 ,  H04J1/08 ,  H04J1/18

CPC classification number: H04J1/05 ,  H04J4/005

Abstract: Group modulator having digital operation for processing samples taken from n voice frequency channels. Digitized samples are divided into a plurality of subgroups, for example two subgroups of n/2 channels, and applied through first and second double modulation circuits. The respective outputs of the modulation circuits are applied through a circuit which is alternately switched to add and subtract the outputs. After the sums and remainders have been passed through a digital to analog converter, they are alternately switched to be applied through separate analog filters having different pass bands to a common output.

公开(公告)号：US3875340A

公开(公告)日：1975-04-01

申请号：US37616973

申请日：1973-07-03

Applicant: CIT ALCATEL

Inventor： ROY MARIE-ANNICK ,  CABET ALAIN ,  DESOMBRE PATRICE

IPC: H04J1/04 ,  H04J1/05

CPC classification number: H04J1/04 ,  H04J1/05

Abstract: Digital system which, from n voice frequency channels, furnishes a band of a frequency multiplex system, for example, a primary base group of twelve channels of 4 kHz each, covering the band 60 - 108 kHz, and comprises between an analog-digital input converter receiving the voice frequency channels and a digitalanalog output converter emitting the desired band, only members of the digital type operating on digital information or data ''''words.

Abstract translation: 数字系统，其从n个语音频道通道提供频率复用系统的频带，例如，每个具有4kHz的12个信道的主基组，覆盖频带60-108kHz，并且包括在模拟数字输入 接收语音频道的转换器和发射所需频带的数字模拟输出转换器，只有在数字信息或数据“字上操作的数字类型的成员。

公开(公告)号：FR2296319A1

公开(公告)日：1976-07-23

申请号：FR7443061

申请日：1974-12-27

Applicant: CIT ALCATEL

Inventor： ROY MARIE-ANNICK

IPC: G06F1/035 ,  H04J1/06

Abstract: A digital waveform generator is used to generate n periodic waveforms which have the same shape. It has a memory store into which is store a series of preset numerical values representing samples of a wave, and a unit to control the output of the memory store and to generate the wave. The unit is driven by a clock. The unit has a counting assembly followed by an encoder. The counting assembly has a binary counter controlled by the clock. A computing unit is connected to the counter and to an auxiliary memory in which is stored an initial periodic ratio. The clock provides the sampling frequency and the counting assembly provides the periodic ratios at definite instants to give the waveform required.

公开(公告)号：CA1065510A

公开(公告)日：1979-10-30

申请号：CA237385

申请日：1975-10-06

Applicant: CIT ALCATEL

Inventor： CABET ALAIN ,  PINIER GASTON ,  SEMUR PIERRE ,  ROY MARIE-ANNICK

IPC: H04B3/10 ,  H04J1/14

Abstract: Régulateur de niveau pour système multiplex de fréquence, à amplificateur à gain variable commandé à partir d'une observation de l'amplitude d'une onde pilote présente dans le système multiplex, caractérisé en ce qu'il comporte un filtre numérique précédé d'un échantillonneur et d'un convertisseur analogique-numérique pour extraire l'onde pilote du système multiplex en aval du réseau à gain variable, un circuit de calcul relié au filtre numérique pour déterminer un nombre fonction du niveau de l'onde pilote en sortie du filtre. et un organe de comparaison numérique qui compare ce nombre à une valeur de référence en vue d'engendrer une commande dudit réseau. Dans une réalisation particulière le système multiplex est transposé vers les basses fréquences avant d'être traité numériquement.

公开(公告)号：FR2391602A1

公开(公告)日：1978-12-15

申请号：FR7715233

申请日：1977-05-18

Applicant: CIT ALCATEL

Inventor： ROY MARIE-ANNICK

IPC: H03H15/02 ,  H03K ,  H01L27/04

Abstract: Non-recursive low-pass filter in the delta configuration has a structure that requires less precision and stability than that demanded of classical transverse type. Basically the filter handling sampled signals consists of a chain of delay or phase shifting elements when the delay is inversely proportional to the sampling rate. A summing circuit recombines the outputs from the chain elements and weights them according to the coefficient characteristics of the filter. Two auxiliary summing circuits preceed the final one and apply coefficients of -1 and +1. The chain is synchronised from two clock source, a further such sources acting as a current detector.

公开(公告)号：CA1010582A

公开(公告)日：1977-05-17

申请号：CA186251

申请日：1973-11-20

Applicant: CIT ALCATEL

Inventor： ROY MARIE-ANNICK

IPC: H04J1/05 ,  H04J4/00

公开(公告)号：FR2287811A1

公开(公告)日：1976-05-07

申请号：FR7433786

申请日：1974-10-08

Applicant: CIT ALCATEL

Inventor： CABET ALAIN ,  PINIER GASTON ,  SEMUR PIERRE ,  ROY MARIE-ANNICK

IPC: H04B3/10 ,  H04J1/02

公开(公告)号：DE2544121A1

公开(公告)日：1976-04-22

申请号：DE2544121

申请日：1975-10-02

Applicant: CIT ALCATEL

Inventor： CABET ALAIN ,  PINIER GASTON ,  SEMUR PIERRE ,  ROY MARIE-ANNICK

IPC: H04B3/10

公开(公告)号：DE2333870A1

公开(公告)日：1974-01-17

申请号：DE2333870

申请日：1973-07-03

Applicant: CIT ALCATEL

Inventor： ROY MARIE-ANNICK ,  CABET ALAIN ,  DESOMBRE PATRICE

IPC: H04J1/04 ,  H04J1/05

Abstract: Digital system which, from n voice frequency channels, furnishes a band of a frequency multiplex system, for example, a primary base group of twelve channels of 4 kHz each, covering the band 60 - 108 kHz, and comprises between an analog-digital input converter receiving the voice frequency channels and a digital-analog output converter emitting the desired band, only members of the digital type operating on digital information or data "words.