CA993581A - Circuit in a subscriber's instrument for the feeding of an oscillator - Google Patents

Circuit in a subscriber's instrument for the feeding of an oscillator

Info

Publication number
CA993581A
CA993581A CA193,861A CA193861A CA993581A CA 993581 A CA993581 A CA 993581A CA 193861 A CA193861 A CA 193861A CA 993581 A CA993581 A CA 993581A
Authority
CA
Canada
Prior art keywords
subscriber
oscillator
instrument
feeding
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
CA193,861A
Other languages
English (en)
Inventor
Kjell-Arne Persson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of CA993581A publication Critical patent/CA993581A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
CA193,861A 1973-03-05 1974-03-01 Circuit in a subscriber's instrument for the feeding of an oscillator Expired CA993581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7303043A SE363948B (fr) 1973-03-05 1973-03-05

Publications (1)

Publication Number Publication Date
CA993581A true CA993581A (en) 1976-07-20

Family

ID=20316803

Family Applications (1)

Application Number Title Priority Date Filing Date
CA193,861A Expired CA993581A (en) 1973-03-05 1974-03-01 Circuit in a subscriber's instrument for the feeding of an oscillator

Country Status (11)

Country Link
US (1) US3916114A (fr)
CA (1) CA993581A (fr)
CH (1) CH581931A5 (fr)
DK (1) DK138146B (fr)
FI (1) FI56293C (fr)
FR (1) FR2220941B1 (fr)
GB (1) GB1447726A (fr)
IT (1) IT1007412B (fr)
NL (1) NL7402380A (fr)
NO (1) NO132411C (fr)
SE (1) SE363948B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4323792A (en) * 1978-06-28 1982-04-06 Bergmann Guenther Two terminal circuitry for voltage limitation
JPS601790B2 (ja) * 1979-09-14 1985-01-17 岩崎通信機株式会社 押し釦ダイヤル回路
US4286120A (en) * 1979-10-15 1981-08-25 Gte Automatic Electric Labs Inc. Current regulated pulse dialer circuit
US4536614A (en) * 1982-12-13 1985-08-20 Gte Communication Systems Corporation Supervision and dial pulse detection circuit for a telephone subscriber line

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035122A (en) * 1958-09-30 1962-05-15 Gen Dynamics Corp Constant current line circuitt for loop telephone lines
FR2087469A5 (fr) * 1970-05-20 1971-12-31 Ericsson Telefon Ab L M
CA930488A (en) * 1971-08-27 1973-07-17 C. J. Cowpland Michael Power supply

Also Published As

Publication number Publication date
SE363948B (fr) 1974-02-04
DE2408688B2 (de) 1976-09-23
US3916114A (en) 1975-10-28
GB1447726A (en) 1976-08-25
AU6618074A (en) 1975-09-04
FR2220941B1 (fr) 1977-09-23
DE2408688A1 (de) 1974-09-26
IT1007412B (it) 1976-10-30
NO132411C (fr) 1975-11-05
CH581931A5 (fr) 1976-11-15
FR2220941A1 (fr) 1974-10-04
DK138146B (da) 1978-07-17
NL7402380A (fr) 1974-09-09
FI56293C (fi) 1979-12-10
FI56293B (fi) 1979-08-31
NO132411B (fr) 1975-07-28
DK138146C (fr) 1978-12-18

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