CA920672A - Tone detector control circuit - Google Patents

Tone detector control circuit

Info

Publication number
CA920672A
CA920672A CA123520A CA123520A CA920672A CA 920672 A CA920672 A CA 920672A CA 123520 A CA123520 A CA 123520A CA 123520 A CA123520 A CA 123520A CA 920672 A CA920672 A CA 920672A
Authority
CA
Canada
Prior art keywords
control circuit
tone detector
detector control
tone
circuit
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
CA123520A
Other languages
English (en)
Other versions
CA123520S (en
Inventor
F. Weber Vernon
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.)
GTE Automatic Electric Laboratories Inc
Original Assignee
GTE Automatic Electric Laboratories Inc
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 GTE Automatic Electric Laboratories Inc filed Critical GTE Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of CA920672A publication Critical patent/CA920672A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/30—Modifications for providing a predetermined threshold before switching
    • 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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Current Or Voltage (AREA)
CA123520A 1970-10-12 1971-09-23 Tone detector control circuit Expired CA920672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8000170A 1970-10-12 1970-10-12

Publications (1)

Publication Number Publication Date
CA920672A true CA920672A (en) 1973-02-06

Family

ID=22154210

Family Applications (1)

Application Number Title Priority Date Filing Date
CA123520A Expired CA920672A (en) 1970-10-12 1971-09-23 Tone detector control circuit

Country Status (3)

Country Link
US (1) US3638038A (fr)
BE (1) BE773734A (fr)
CA (1) CA920672A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763324A (en) * 1971-10-01 1973-10-02 Integrated Systems Technology Tone detector system
US3798600A (en) * 1972-09-11 1974-03-19 Trio Electronics Inc Method and system of remote control
US3792290A (en) * 1973-02-20 1974-02-12 Motorola Inc Tone detector with constant detection response time
US3882287A (en) * 1973-04-20 1975-05-06 Perkins Res & Mfg Co Method and apparatus for detecting faults and locating conductors in multi-conductor cables
US4145660A (en) * 1977-12-23 1979-03-20 Rca Corporation Frequency activated circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061742A (en) * 1959-12-28 1962-10-30 Gen Dynamics Corp Stable transistor frequency changer having a stable multivibrator with synchronizing pulse input
US3098939A (en) * 1961-12-21 1963-07-23 Ibm Integrating pulse circuit having regenerative feed back to effect pulse shaping
BE626344A (fr) * 1961-12-21
US3235750A (en) * 1962-06-08 1966-02-15 Gen Precision Inc Steering circuit for complementary type transistor switch
US3551699A (en) * 1967-07-10 1970-12-29 Honeywell Inc Control apparatus
US3582799A (en) * 1969-08-25 1971-06-01 Gen Dynamics Corp Discriminator circuit of the charge transfer type

Also Published As

Publication number Publication date
US3638038A (en) 1972-01-25
BE773734A (fr) 1972-04-11

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