AT374325B - DEVICE FOR GENERATING TWO ELECTRIC VIBRATIONS OF DIFFERENT FREQUENCIES, IN PARTICULAR FOR GENERATING CODE-CHARACTERS FOR MULTI-FREQUENCY CODE SELECTION - Google Patents

DEVICE FOR GENERATING TWO ELECTRIC VIBRATIONS OF DIFFERENT FREQUENCIES, IN PARTICULAR FOR GENERATING CODE-CHARACTERS FOR MULTI-FREQUENCY CODE SELECTION

Info

Publication number
AT374325B
AT374325B AT209780A AT209780A AT374325B AT 374325 B AT374325 B AT 374325B AT 209780 A AT209780 A AT 209780A AT 209780 A AT209780 A AT 209780A AT 374325 B AT374325 B AT 374325B
Authority
AT
Austria
Prior art keywords
generating
code
characters
different frequencies
electric vibrations
Prior art date
Application number
AT209780A
Other languages
German (de)
Other versions
ATA209780A (en
Inventor
Rainer Ing Domes
Wolfdieter Ing Rueger
Guenter Stipek
Original Assignee
Siemens Ag Oesterreich
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 Siemens Ag Oesterreich filed Critical Siemens Ag Oesterreich
Priority to AT209780A priority Critical patent/AT374325B/en
Priority to DE19813111821 priority patent/DE3111821A1/en
Publication of ATA209780A publication Critical patent/ATA209780A/en
Application granted granted Critical
Publication of AT374325B publication Critical patent/AT374325B/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2101/00—Indexing scheme relating to the type of digital function generated
    • G06F2101/04—Trigonometric functions

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
AT209780A 1980-04-18 1980-04-18 DEVICE FOR GENERATING TWO ELECTRIC VIBRATIONS OF DIFFERENT FREQUENCIES, IN PARTICULAR FOR GENERATING CODE-CHARACTERS FOR MULTI-FREQUENCY CODE SELECTION AT374325B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT209780A AT374325B (en) 1980-04-18 1980-04-18 DEVICE FOR GENERATING TWO ELECTRIC VIBRATIONS OF DIFFERENT FREQUENCIES, IN PARTICULAR FOR GENERATING CODE-CHARACTERS FOR MULTI-FREQUENCY CODE SELECTION
DE19813111821 DE3111821A1 (en) 1980-04-18 1981-03-25 Device for generating superimposed electric oscillations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT209780A AT374325B (en) 1980-04-18 1980-04-18 DEVICE FOR GENERATING TWO ELECTRIC VIBRATIONS OF DIFFERENT FREQUENCIES, IN PARTICULAR FOR GENERATING CODE-CHARACTERS FOR MULTI-FREQUENCY CODE SELECTION

Publications (2)

Publication Number Publication Date
ATA209780A ATA209780A (en) 1983-08-15
AT374325B true AT374325B (en) 1984-04-10

Family

ID=3527676

Family Applications (1)

Application Number Title Priority Date Filing Date
AT209780A AT374325B (en) 1980-04-18 1980-04-18 DEVICE FOR GENERATING TWO ELECTRIC VIBRATIONS OF DIFFERENT FREQUENCIES, IN PARTICULAR FOR GENERATING CODE-CHARACTERS FOR MULTI-FREQUENCY CODE SELECTION

Country Status (2)

Country Link
AT (1) AT374325B (en)
DE (1) DE3111821A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5034977A (en) * 1989-04-04 1991-07-23 Industrial Technology Research Institute Phase accumulation dual tone multiple frequency generator
GB2258774B (en) * 1991-08-16 1994-12-07 Marconi Instruments Ltd Waveform generators
FR2720164B1 (en) * 1994-05-17 1996-06-21 Valeo Electronique Ultrasonic Doppler type motion detection device.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL154386B (en) * 1972-04-17 1977-08-15 Nederlanden Staat SIGNALING SYSTEM.
US4058805A (en) * 1975-06-16 1977-11-15 Comdial Corporation Digital multitone generator for telephone dialing
DE2906471A1 (en) * 1979-02-20 1980-08-28 Siemens Ag CIRCUIT ARRANGEMENT FOR THE SEQUENTIAL GENERATION OF THE FUNCTIONAL VALUES OF SEVERAL VIBRATIONS, THE FOLLOWING FREQUENCIES OF WHICH ARE N-FOLD A BASIC VIBRATION
DE2920169A1 (en) * 1979-05-18 1980-11-20 Inst Rundfunktechnik Gmbh Generator synthesising audio frequencies - supplied from descriptors using programmable read only memory and D=A converter

Also Published As

Publication number Publication date
DE3111821A1 (en) 1982-03-18
ATA209780A (en) 1983-08-15

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee