CA1001235A - Generator for generating a number of selected frequencies - Google Patents

Generator for generating a number of selected frequencies

Info

Publication number
CA1001235A
CA1001235A CA164,801A CA164801A CA1001235A CA 1001235 A CA1001235 A CA 1001235A CA 164801 A CA164801 A CA 164801A CA 1001235 A CA1001235 A CA 1001235A
Authority
CA
Canada
Prior art keywords
generator
generating
selected frequencies
frequencies
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.)
Expired
Application number
CA164,801A
Other languages
English (en)
Other versions
CA164801S (en
Inventor
Eduard W. Van Zuuren
Jacob De Vos
Hans Cool
Gradus C. Groenendaal
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA1001235A publication Critical patent/CA1001235A/en
Expired legal-status Critical Current

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Manipulation Of Pulses (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Devices For Supply Of Signal Current (AREA)
CA164,801A 1972-03-04 1973-02-28 Generator for generating a number of selected frequencies Expired CA1001235A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7202908A NL7202908A (en, 2012) 1972-03-04 1972-03-04

Publications (1)

Publication Number Publication Date
CA1001235A true CA1001235A (en) 1976-12-07

Family

ID=19815514

Family Applications (1)

Application Number Title Priority Date Filing Date
CA164,801A Expired CA1001235A (en) 1972-03-04 1973-02-28 Generator for generating a number of selected frequencies

Country Status (7)

Country Link
US (1) US3829783A (en, 2012)
JP (1) JPS545923B2 (en, 2012)
CA (1) CA1001235A (en, 2012)
DE (1) DE2308709C3 (en, 2012)
FR (1) FR2174937B1 (en, 2012)
GB (1) GB1416642A (en, 2012)
NL (1) NL7202908A (en, 2012)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995123A (en) * 1974-01-09 1976-11-30 Wilson Charles H Telephone calculator
US3946164A (en) * 1974-05-28 1976-03-23 Gte Automatic Electric Laboratories Incorporated Precise tone signal generator
US4031329A (en) * 1974-06-13 1977-06-21 International Telephone And Telegraph Corporation Time limited telephone paging employs a relay switch actuated by dual frequency tone
US4025865A (en) * 1976-01-08 1977-05-24 General Instrument Corporation Frequency-signalling circuit for a telephone
HU191730B (en) * 1984-12-19 1987-04-28 Telefongyar Circuit arrangement for generating channel carrier, pilot, system carrier and carrier-receiver frequencies of the multichannel carrier-current telephone equipments of premodulation system
HU191731B (en) * 1984-12-19 1987-04-28 Telefongyar Circuit arrangement for generating system carrier, line pilot and channel carrier-control frequencies of multichannel open cable telephon equipments
JPS61155542U (en, 2012) * 1985-03-18 1986-09-26
JP2001186039A (ja) * 1999-12-27 2001-07-06 Sony Corp 受信用ｉｃおよびこれを使用した受信機
JP4666456B2 (ja) * 2004-09-16 2011-04-06 富士通セミコンダクター株式会社 多相クロック生成回路
DE102018222288A1 (de) * 2018-12-19 2020-06-25 Continental Teves Ag & Co. Ohg Hochfrequenzgenerator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1496141A (fr) * 1966-06-03 1967-09-29 Cit Alcatel Générateur d'ondes modulées en fréquence
FR1569618A (en, 2012) * 1967-12-08 1969-06-06
US3590131A (en) * 1969-02-11 1971-06-29 Robert R Reyers Electronic musical scale generator employing a single master oscillator
US3610801A (en) * 1970-02-16 1971-10-05 Triadex Inc Digital music synthesizer
US3657657A (en) * 1970-08-03 1972-04-18 William T Jefferson Digital sine wave generator
US3671871A (en) * 1970-12-14 1972-06-20 Northrop Corp Signal frequency synthesizer

Also Published As

Publication number Publication date
JPS48102964A (en, 2012) 1973-12-24
JPS545923B2 (en, 2012) 1979-03-23
DE2308709B2 (de) 1977-11-03
GB1416642A (en) 1975-12-03
NL7202908A (en, 2012) 1973-09-07
FR2174937A1 (en, 2012) 1973-10-19
FR2174937B1 (en, 2012) 1976-11-05
DE2308709C3 (de) 1978-06-29
US3829783A (en) 1974-08-13
DE2308709A1 (de) 1973-09-13

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