FR2335999A1 - Circuit de commutation, notamment pour amplificateur telephonique - Google Patents

Circuit de commutation, notamment pour amplificateur telephonique

Info

Publication number
FR2335999A1
FR2335999A1 FR7637725A FR7637725A FR2335999A1 FR 2335999 A1 FR2335999 A1 FR 2335999A1 FR 7637725 A FR7637725 A FR 7637725A FR 7637725 A FR7637725 A FR 7637725A FR 2335999 A1 FR2335999 A1 FR 2335999A1
Authority
FR
France
Prior art keywords
amplifier
diodes
switching circuit
telephone switching
current amplifier
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.)
Granted
Application number
FR7637725A
Other languages
English (en)
French (fr)
Other versions
FR2335999B1 (enrdf_load_stackoverflow
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.)
Post Office
Original Assignee
Post Office
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
Priority claimed from GB51587/75A external-priority patent/GB1565200A/en
Application filed by Post Office filed Critical Post Office
Publication of FR2335999A1 publication Critical patent/FR2335999A1/fr
Application granted granted Critical
Publication of FR2335999B1 publication Critical patent/FR2335999B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)
FR7637725A 1975-12-17 1976-12-15 Circuit de commutation, notamment pour amplificateur telephonique Granted FR2335999A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB51587/75A GB1565200A (en) 1976-01-06 1975-12-17 Switching circuit

Publications (2)

Publication Number Publication Date
FR2335999A1 true FR2335999A1 (fr) 1977-07-15
FR2335999B1 FR2335999B1 (enrdf_load_stackoverflow) 1982-07-09

Family

ID=10460615

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7637725A Granted FR2335999A1 (fr) 1975-12-17 1976-12-15 Circuit de commutation, notamment pour amplificateur telephonique

Country Status (5)

Country Link
BE (1) BE849549A (enrdf_load_stackoverflow)
CA (1) CA1064632A (enrdf_load_stackoverflow)
FR (1) FR2335999A1 (enrdf_load_stackoverflow)
NL (1) NL7613987A (enrdf_load_stackoverflow)
SE (1) SE424396B (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502905A (en) * 1967-05-17 1970-03-24 Honeywell Inc Differential amplifier and field effect transistor gates for applying largest of two inputs to output
GB1395495A (en) * 1971-06-30 1975-05-29 Post Office Telephone conference amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502905A (en) * 1967-05-17 1970-03-24 Honeywell Inc Differential amplifier and field effect transistor gates for applying largest of two inputs to output
GB1395495A (en) * 1971-06-30 1975-05-29 Post Office Telephone conference amplifier

Also Published As

Publication number Publication date
FR2335999B1 (enrdf_load_stackoverflow) 1982-07-09
SE7614149L (sv) 1977-06-18
NL7613987A (nl) 1977-06-21
SE424396B (sv) 1982-07-12
CA1064632A (en) 1979-10-16
BE849549A (fr) 1977-04-15

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Legal Events

Date Code Title Description
ST Notification of lapse