BE753623A - Generateur de signaux multifrequences - Google Patents

Generateur de signaux multifrequences

Info

Publication number
BE753623A
BE753623A BE753623DA BE753623A BE 753623 A BE753623 A BE 753623A BE 753623D A BE753623D A BE 753623DA BE 753623 A BE753623 A BE 753623A
Authority
BE
Belgium
Prior art keywords
frequency signal
signal generator
generator
frequency
signal
Prior art date
Application number
Other languages
English (en)
Inventor
C E Rielm
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of BE753623A publication Critical patent/BE753623A/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/20—Generation 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
    • H03B5/24—Generation 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 semiconductor device
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION 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
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/02—Varying the frequency of the oscillations by electronic means
    • H03B2201/0275—Varying the frequency of the oscillations by electronic means the means delivering several selected voltages or currents
    • H03B2201/0283—Varying the frequency of the oscillations by electronic means the means delivering several selected voltages or currents the means functioning digitally

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electronic Switches (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
BE753623D 1969-07-22 1970-07-17 Generateur de signaux multifrequences BE753623A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84332169A 1969-07-22 1969-07-22

Publications (1)

Publication Number Publication Date
BE753623A true BE753623A (fr) 1970-12-31

Family

ID=25289631

Family Applications (1)

Application Number Title Priority Date Filing Date
BE753623D BE753623A (fr) 1969-07-22 1970-07-17 Generateur de signaux multifrequences

Country Status (6)

Country Link
US (1) US3612773A (fr)
JP (1) JPS5023943B1 (fr)
BE (1) BE753623A (fr)
DE (1) DE2035196A1 (fr)
FR (1) FR2055272A5 (fr)
GB (1) GB1301135A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE795179A (fr) * 1972-02-11 1973-08-09 Gte Automatic Electric Lab Inc Generateur acoustique a clavier de selection
US3790813A (en) * 1972-11-30 1974-02-05 Gte Automatic Electric Lab Inc Film switching system for mutually isolated circuits
GB2006492B (en) * 1977-08-12 1982-01-20 English Electric Co Ltd Input circuits

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE572049A (fr) * 1957-12-03 1900-01-01
US3246173A (en) * 1964-01-29 1966-04-12 Rca Corp Signal translating circuit employing insulated-gate field effect transistors coupledthrough a common semiconductor substrate
US3424870A (en) * 1965-09-14 1969-01-28 Bell Telephone Labor Inc Multifrequency signal generator for tone-dialed telephones
US3422229A (en) * 1965-10-24 1969-01-14 Susquehanna Corp Electronic transmitting device
US3428832A (en) * 1966-04-21 1969-02-18 Hughes Aircraft Co Electronic switching circuit employing insulated gate field effect transistors
US3509375A (en) * 1966-10-18 1970-04-28 Honeywell Inc Switching circuitry for isolating an input and output circuit utilizing a plurality of insulated gate magnetic oxide field effect transistors
US3521141A (en) * 1967-10-30 1970-07-21 Ibm Leakage controlled electric charge switching and storing circuitry

Also Published As

Publication number Publication date
GB1301135A (en) 1972-12-29
US3612773A (en) 1971-10-12
DE2035196A1 (de) 1971-02-11
FR2055272A5 (fr) 1971-05-07
JPS5023943B1 (fr) 1975-08-12

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: WESTERN ELECTRIC CY INC.

Effective date: 19840717