FR2258056A1 - Telephone signal digital-analog converter - harmonically-related modulation and sampling frequencies - Google Patents

Telephone signal digital-analog converter - harmonically-related modulation and sampling frequencies

Info

Publication number
FR2258056A1
FR2258056A1 FR7316059A FR7316059A FR2258056A1 FR 2258056 A1 FR2258056 A1 FR 2258056A1 FR 7316059 A FR7316059 A FR 7316059A FR 7316059 A FR7316059 A FR 7316059A FR 2258056 A1 FR2258056 A1 FR 2258056A1
Authority
FR
France
Prior art keywords
telephone signal
harmonically
analog converter
analogue
digital
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7316059A
Other languages
French (fr)
Other versions
FR2258056B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Priority to FR7316059A priority Critical patent/FR2258056A1/en
Publication of FR2258056A1 publication Critical patent/FR2258056A1/en
Application granted granted Critical
Publication of FR2258056B1 publication Critical patent/FR2258056B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H04J4/005—Transmultiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/02—Selecting arrangements for multiplex systems for frequency-division multiplexing

Abstract

The telephone signal converter translates digital transmission signals into analogue signals whose modulation frequency is a simple multiple of the digital system's sampling frequency, and vice versa. The digital multiplexer (2) contains an input decoder (12) whose output is multiplexed (15, 16) via a low pass filter (18) and amplifier (21) to the inout of the analogue multiplexer unit (5). The analogue multiplexer's input passes over a low pass filter to a first modulator (33), and from there over a bandpass filter to the second modulator (40). Conversion in the opposite direction takes place in teh same manner using a coder. The sampling frequency is 8 kHz and the first modulation frequency is 24 kHz.
FR7316059A 1973-05-04 1973-05-04 Telephone signal digital-analog converter - harmonically-related modulation and sampling frequencies Granted FR2258056A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7316059A FR2258056A1 (en) 1973-05-04 1973-05-04 Telephone signal digital-analog converter - harmonically-related modulation and sampling frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7316059A FR2258056A1 (en) 1973-05-04 1973-05-04 Telephone signal digital-analog converter - harmonically-related modulation and sampling frequencies

Publications (2)

Publication Number Publication Date
FR2258056A1 true FR2258056A1 (en) 1975-08-08
FR2258056B1 FR2258056B1 (en) 1976-05-28

Family

ID=9118810

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7316059A Granted FR2258056A1 (en) 1973-05-04 1973-05-04 Telephone signal digital-analog converter - harmonically-related modulation and sampling frequencies

Country Status (1)

Country Link
FR (1) FR2258056A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2634357A1 (en) * 1976-07-30 1978-02-02 Siemens Ag Circuit for conversion of PCM into carrier signals - has D=A converter and bandpass filter separating single sideband signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2634357A1 (en) * 1976-07-30 1978-02-02 Siemens Ag Circuit for conversion of PCM into carrier signals - has D=A converter and bandpass filter separating single sideband signal

Also Published As

Publication number Publication date
FR2258056B1 (en) 1976-05-28

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Legal Events

Date Code Title Description
ST Notification of lapse