GB1065941A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB1065941A
GB1065941A GB160265A GB160265A GB1065941A GB 1065941 A GB1065941 A GB 1065941A GB 160265 A GB160265 A GB 160265A GB 160265 A GB160265 A GB 160265A GB 1065941 A GB1065941 A GB 1065941A
Authority
GB
United Kingdom
Prior art keywords
diodes
temperature coefficient
resistors
series
shunt
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
GB160265A
Other languages
English (en)
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1065941A publication Critical patent/GB1065941A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Networks Using Active Elements (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB160265A 1964-01-15 1965-01-14 Improvements in or relating to telephone systems Expired GB1065941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0089064 1964-01-15

Publications (1)

Publication Number Publication Date
GB1065941A true GB1065941A (en) 1967-04-19

Family

ID=7514858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB160265A Expired GB1065941A (en) 1964-01-15 1965-01-14 Improvements in or relating to telephone systems

Country Status (6)

Country Link
BE (1) BE658384A (OSRAM)
CH (1) CH416754A (OSRAM)
DE (1) DE1437449B2 (OSRAM)
GB (1) GB1065941A (OSRAM)
NL (1) NL6413946A (OSRAM)
SE (1) SE331119B (OSRAM)

Also Published As

Publication number Publication date
SE331119B (OSRAM) 1970-12-14
NL6413946A (OSRAM) 1965-07-16
DE1437449B2 (de) 1972-06-15
DE1437449A1 (de) 1968-10-24
BE658384A (OSRAM) 1965-07-15
CH416754A (de) 1966-07-15

Similar Documents

Publication Publication Date Title
US2818470A (en) Compensated transistor circuit
US2387269A (en) Telephone system
GB547269A (en) Transmission systems for electrical communication
SE7705441L (sv) Anordning vid telefonanleggningar
US2629783A (en) Telephone circuit
GB1065941A (en) Improvements in or relating to telephone systems
GB547304A (en) Electric circuit control
GB835534A (en) Improvements in or relating to symmetrical current circuits fed by direct current
GB1271310A (en) Improvements in or relating to telecommunications system subscriber station circuit arrangements
US4289939A (en) Longitudinal balance arrangements for two-to-four wire telecommunication line circuits
GB1189377A (en) Improvements in or relating to Telephone Subset Speech Circuits
GB1185514A (en) Improvements in or relating to Telephone Set Circuits.
GB1279533A (en) Direct current reduction network for amplification telephone sets
GB557710A (en) Circuit arrangements for resistance elements having a high resistance-temperature coefficient
US2167069A (en) Transmission system
GB805726A (en) Improvements in or relating to circuit arrangements for automatically regulating sidetone damping in telephone stations
GB1004854A (en) Improvements in or relating to loudspeaking telephone apparatus
GB525462A (en) Improvements in or relating to two-way telephone and telegraph circuits
GB558761A (en) Circuit arrangements for resistance elements having a high resistance-temperature coefficient
GB863706A (en) Improvements in or relating to telephone sub-sets
GB838783A (en) Improvements in or relating to monitoring arrangements
GB868054A (en) Improvements in or relating to telephone sub-sets
US2408072A (en) Telephone repeater circuit
GB558632A (en) Improvements in or relating to thermionic valve circuits
GB1030941A (en) Circuit arrangement for varying the level of a signal