SE416100B - Stromkrets for digital syntetisering av en signal bestaende av m overlagrade vagformer med olika frekvens - Google Patents

Stromkrets for digital syntetisering av en signal bestaende av m overlagrade vagformer med olika frekvens

Info

Publication number
SE416100B
SE416100B SE7600157A SE7600157A SE416100B SE 416100 B SE416100 B SE 416100B SE 7600157 A SE7600157 A SE 7600157A SE 7600157 A SE7600157 A SE 7600157A SE 416100 B SE416100 B SE 416100B
Authority
SE
Sweden
Prior art keywords
synthetization
overlayed
digital
circuit
different frequencies
Prior art date
Application number
SE7600157A
Other languages
English (en)
Swedish (sv)
Other versions
SE7600157L (sv
Inventor
J C Munday
Original Assignee
Gen Instr Microelect
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 Gen Instr Microelect filed Critical Gen Instr Microelect
Publication of SE7600157L publication Critical patent/SE7600157L/
Priority to DE19762658678 priority Critical patent/DE2658678C2/de
Publication of SE416100B publication Critical patent/SE416100B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H04M1/505—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manipulation Of Pulses (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
SE7600157A 1975-01-10 1976-01-09 Stromkrets for digital syntetisering av en signal bestaende av m overlagrade vagformer med olika frekvens SE416100B (sv)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762658678 DE2658678C2 (de) 1976-01-09 1976-12-23 Verfahren zur pulvermetallurgischen Herstellung stabilisierter ferritischer rostfreier Chromstähle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB120375A GB1529851A (en) 1975-01-10 1975-01-10 Frequency-signalling circuit for a telephone

Publications (2)

Publication Number Publication Date
SE7600157L SE7600157L (sv) 1976-07-12
SE416100B true SE416100B (sv) 1980-11-24

Family

ID=9717956

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7600157A SE416100B (sv) 1975-01-10 1976-01-09 Stromkrets for digital syntetisering av en signal bestaende av m overlagrade vagformer med olika frekvens

Country Status (5)

Country Link
CA (1) CA1031462A (Direct)
DE (1) DE2600606C2 (Direct)
FR (1) FR2297526A1 (Direct)
GB (1) GB1529851A (Direct)
SE (1) SE416100B (Direct)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452823A1 (fr) * 1979-03-30 1980-10-24 Texas Instruments France Generateur de signaux a basse frequence, notamment de signaux de tonalite pour communications telephoniques
GB2121627B (en) * 1982-06-02 1986-01-15 Plessey Co Plc Direct digital synthesiser
DE69610576T2 (de) * 1995-05-19 2001-05-31 Matsushita Electric Works, Ltd. Schneideinheit für elektrischen Rasierapparat

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2027015A1 (de) * 1969-06-02 1970-12-10 Societe Generale de Constructions Electriques et Mecaniques, Alsthom, Paris Verfahren zur Umwandlung eines elektrischen analogen Signales in ein numerisches und umgekehrt und Schaltung zur Durchführung des Verfahrens
US3820028A (en) * 1971-08-27 1974-06-25 J Thomas Digital tone signal generator
NL160687C (nl) * 1972-06-10 1979-11-15 Philips Nv Toongenerator voor het opwekken van gekozen frequenties.
US3787836A (en) * 1972-06-15 1974-01-22 Bell Telephone Labor Inc Multitone telephone dialing circuit employing digital-to-analog tone synthesis

Also Published As

Publication number Publication date
SE7600157L (sv) 1976-07-12
FR2297526A1 (fr) 1976-08-06
CA1031462A (en) 1978-05-16
GB1529851A (en) 1978-10-25
DE2600606C2 (de) 1985-06-20
DE2600606A1 (de) 1976-07-15
FR2297526B1 (Direct) 1978-05-12

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