BE523372A - - Google Patents

Info

Publication number
BE523372A
BE523372A BE523372DA BE523372A BE 523372 A BE523372 A BE 523372A BE 523372D A BE523372D A BE 523372DA BE 523372 A BE523372 A BE 523372A
Authority
BE
Belgium
Application number
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.)
Publication of BE523372A publication Critical patent/BE523372A/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03BGENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B23/00Generation of oscillations periodically swept over a predetermined frequency range
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03BGENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/20Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H03B5/22Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being vacuum tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
BE523372D 1952-10-08 BE523372A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US313688A US2745008A (en) 1952-10-08 1952-10-08 Electronic tone generator

Publications (1)

Publication Number Publication Date
BE523372A true BE523372A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=23216713

Family Applications (1)

Application Number Title Priority Date Filing Date
BE523372D BE523372A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1952-10-08

Country Status (4)

Country Link
US (1) US2745008A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE523372A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE943360C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB734466A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832838A (en) * 1952-07-28 1958-04-29 Gen Dynamics Corp Electronic ringing apparatus
US3109994A (en) * 1960-06-30 1963-11-05 Automatic Elect Lab Multivibrator and amplifier powered by pulsating d. c.
US3443125A (en) * 1966-05-26 1969-05-06 Itt Tone supply gate circuit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1998119A (en) * 1932-08-19 1935-04-16 Bell Telephone Labor Inc Frequency changer and circuits therefor
US2152016A (en) * 1935-08-15 1939-03-28 Siemens Und Halske Ag Modulation
BE435784A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1938-08-04
BE465290A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1945-04-30
US2541060A (en) * 1948-05-18 1951-02-13 Faximile Inc Tone and density compensating device
DE820753C (de) * 1948-10-02 1951-11-12 Siemens & Halske A G Schaltungsanordnung zur Erzeugung eines zerhackten Wechselstromes
NL82003C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1949-10-11

Also Published As

Publication number Publication date
US2745008A (en) 1956-05-08
GB734466A (en) 1955-08-03
DE943360C (de) 1956-05-17

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