JPS54134508A - Transmission/receiving unit of double side-band frequency division multiple signal for dial signal - Google Patents

Transmission/receiving unit of double side-band frequency division multiple signal for dial signal

Info

Publication number
JPS54134508A
JPS54134508A JP4206878A JP4206878A JPS54134508A JP S54134508 A JPS54134508 A JP S54134508A JP 4206878 A JP4206878 A JP 4206878A JP 4206878 A JP4206878 A JP 4206878A JP S54134508 A JPS54134508 A JP S54134508A
Authority
JP
Japan
Prior art keywords
dial
transmission
receiving unit
division multiple
frequency division
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
JP4206878A
Other languages
Japanese (ja)
Other versions
JPS5820491B2 (en
Inventor
Akira Ishimatsu
Tadanori Fujisaki
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP53042068A priority Critical patent/JPS5820491B2/en
Publication of JPS54134508A publication Critical patent/JPS54134508A/en
Publication of JPS5820491B2 publication Critical patent/JPS5820491B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements

Abstract

PURPOSE:To make a transmission/receiving unit of double side-band frequency division multiple signals for dial signals (DSB-FDM signals for dial signals), which is dependent upon the out-band transmission system, small-size. CONSTITUTION:Oscillated frequencies of oscillators 2 n which are connected to input terminals 1 and are turned on or off by dial pulses are assigned to 4xmK Hz for every channel. Next, adder 3 operates the sum of outputs of oscillatos 2 n, and the band is limited by comb line filter 4. Then, the output is converted by D/A converter 5, and the frequency is converted by the analogue mixer constituted by frequency converter 6 and local oscillator 7.
JP53042068A 1978-04-12 1978-04-12 Double-sided frequency division multiplexing signal transmitter/receiver for dial signals Expired JPS5820491B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53042068A JPS5820491B2 (en) 1978-04-12 1978-04-12 Double-sided frequency division multiplexing signal transmitter/receiver for dial signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53042068A JPS5820491B2 (en) 1978-04-12 1978-04-12 Double-sided frequency division multiplexing signal transmitter/receiver for dial signals

Publications (2)

Publication Number Publication Date
JPS54134508A true JPS54134508A (en) 1979-10-19
JPS5820491B2 JPS5820491B2 (en) 1983-04-23

Family

ID=12625761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53042068A Expired JPS5820491B2 (en) 1978-04-12 1978-04-12 Double-sided frequency division multiplexing signal transmitter/receiver for dial signals

Country Status (1)

Country Link
JP (1) JPS5820491B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5210612A (en) * 1975-06-24 1977-01-27 Trt Telecom Radio Electr Auxiliary signal processor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5210612A (en) * 1975-06-24 1977-01-27 Trt Telecom Radio Electr Auxiliary signal processor

Also Published As

Publication number Publication date
JPS5820491B2 (en) 1983-04-23

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