GB2163320B - Telephone circuit - Google Patents

Telephone circuit

Info

Publication number
GB2163320B
GB2163320B GB08420592A GB8420592A GB2163320B GB 2163320 B GB2163320 B GB 2163320B GB 08420592 A GB08420592 A GB 08420592A GB 8420592 A GB8420592 A GB 8420592A GB 2163320 B GB2163320 B GB 2163320B
Authority
GB
United Kingdom
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.)
Expired
Application number
GB08420592A
Other versions
GB8420592D0 (en
GB2163320A (en
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
Priority to GB08420592A priority Critical patent/GB2163320B/en
Publication of GB8420592D0 publication Critical patent/GB8420592D0/en
Priority to GB08505934A priority patent/GB2163306B/en
Priority to GB08505935A priority patent/GB2163312B/en
Priority to AU45503/85A priority patent/AU4550385A/en
Publication of GB2163320A publication Critical patent/GB2163320A/en
Application granted granted Critical
Publication of GB2163320B publication Critical patent/GB2163320B/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
GB08420592A 1984-08-14 1984-08-14 Telephone circuit Expired GB2163320B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB08420592A GB2163320B (en) 1984-08-14 1984-08-14 Telephone circuit
GB08505934A GB2163306B (en) 1984-08-14 1985-03-07 Rectifier bridge
GB08505935A GB2163312B (en) 1984-08-14 1985-03-07 Amplifier
AU45503/85A AU4550385A (en) 1984-08-14 1985-07-26 Telephone circuit

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
GB8420592D0 GB8420592D0 (en) 1984-09-19
GB2163320A GB2163320A (en) 1986-02-19
GB2163320B true GB2163320B (en) 1988-01-27

Family

ID=10565300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08420592A Expired GB2163320B (en) 1984-08-14 1984-08-14 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
KR100411533B1 (en) * 1995-11-29 2004-04-03 코닌클리케 필립스 일렉트로닉스 엔.브이. Wired telecommunication terminal

Also Published As

Publication number Publication date
AU4550385A (en) 1986-02-20
GB8420592D0 (en) 1984-09-19
GB2163320A (en) 1986-02-19

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930814