AU4550385A - Telephone circuit - Google Patents

Telephone circuit

Info

Publication number
AU4550385A
AU4550385A AU45503/85A AU4550385A AU4550385A AU 4550385 A AU4550385 A AU 4550385A AU 45503/85 A AU45503/85 A AU 45503/85A AU 4550385 A AU4550385 A AU 4550385A AU 4550385 A AU4550385 A AU 4550385A
Authority
AU
Australia
Prior art keywords
telephone circuit
telephone
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.)
Abandoned
Application number
AU45503/85A
Inventor
Peter Fred Blomley
Andrew Paul Lefevre
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.)
STC PLC
Original Assignee
STC PLC
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 STC PLC filed Critical STC PLC
Publication of AU4550385A publication Critical patent/AU4550385A/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • H02M7/2195—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration the switches being synchronously commutated at the same frequency of the AC input voltage
AU45503/85A 1984-08-14 1985-07-26 Telephone circuit Abandoned AU4550385A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8420592 1984-08-14
GB08420592A GB2163320B (en) 1984-08-14 1984-08-14 Telephone circuit

Publications (1)

Publication Number Publication Date
AU4550385A true AU4550385A (en) 1986-02-20

Family

ID=10565300

Family Applications (1)

Application Number Title Priority Date Filing Date
AU45503/85A Abandoned AU4550385A (en) 1984-08-14 1985-07-26 Telephone circuit

Country Status (2)

Country Link
AU (1) AU4550385A (en)
GB (1) GB2163320B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6399656A (en) * 1986-10-15 1988-04-30 Toshiba Corp Telephone terminal equipment
GB2240239A (en) * 1990-01-17 1991-07-24 Carl Mikael Bellman Aktiebolag Sound-signal device
DE69634722T2 (en) * 1995-11-29 2006-01-19 Koninklijke Philips Electronics N.V. END UNIT FOR A WIRE-LINKED TELECOMMUNICATION SYSTEM

Also Published As

Publication number Publication date
GB8420592D0 (en) 1984-09-19
GB2163320B (en) 1988-01-27
GB2163320A (en) 1986-02-19

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