JPS57174941A - Automatic hybrid circuit - Google Patents

Automatic hybrid circuit

Info

Publication number
JPS57174941A
JPS57174941A JP5969781A JP5969781A JPS57174941A JP S57174941 A JPS57174941 A JP S57174941A JP 5969781 A JP5969781 A JP 5969781A JP 5969781 A JP5969781 A JP 5969781A JP S57174941 A JPS57174941 A JP S57174941A
Authority
JP
Japan
Prior art keywords
wire
circuit
output
filter
subtractors
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
JP5969781A
Other languages
Japanese (ja)
Other versions
JPS6223935B2 (en
Inventor
Eiichi Amada
Toshiro Suzuki
Hirotoshi Shirasu
Hiroshi Kuwabara
Yuichi Morikawa
Hirohiko Sato
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP5969781A priority Critical patent/JPS57174941A/en
Publication of JPS57174941A publication Critical patent/JPS57174941A/en
Publication of JPS6223935B2 publication Critical patent/JPS6223935B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To make a device and circuit small-sized, by cancelling an undesirable leakage signal from a 2/4 wire coupling point to a 4-wire output line with a filter output and controlling the fluctuation of the impedance at 2-wire side to optimum. CONSTITUTION:Switch groups 212 and 213 which select two filters from a filter group 211 coupled to a 4-wire type input line 202 are provided. Further, subtractors 203 and 204 to subtract two selected filter outputes from a 2/4-wire coupling point 214 are provided, the output of the subtractors is compared and the switch groups 212 and 213 which minimize a signal from the 4-wire input line 202 given to a 4-wire output line 201 are controlled at a discrimination circuit 205. A caller recognizing circuit 207 detects a call signal from another caller near by in calling with a telephone set 210 and stops the operation of the circuit 205.
JP5969781A 1981-04-22 1981-04-22 Automatic hybrid circuit Granted JPS57174941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5969781A JPS57174941A (en) 1981-04-22 1981-04-22 Automatic hybrid circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5969781A JPS57174941A (en) 1981-04-22 1981-04-22 Automatic hybrid circuit

Publications (2)

Publication Number Publication Date
JPS57174941A true JPS57174941A (en) 1982-10-27
JPS6223935B2 JPS6223935B2 (en) 1987-05-26

Family

ID=13120652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5969781A Granted JPS57174941A (en) 1981-04-22 1981-04-22 Automatic hybrid circuit

Country Status (1)

Country Link
JP (1) JPS57174941A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6165629A (en) * 1984-09-07 1986-04-04 Hitachi Ltd Digital automatic hybrid circuit
JPH07326990A (en) * 1994-06-02 1995-12-12 Nec Corp Automatic matching control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6165629A (en) * 1984-09-07 1986-04-04 Hitachi Ltd Digital automatic hybrid circuit
JPH07326990A (en) * 1994-06-02 1995-12-12 Nec Corp Automatic matching control device

Also Published As

Publication number Publication date
JPS6223935B2 (en) 1987-05-26

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