JPS6489721A - Two-wire/four-wire converting circuit - Google Patents

Two-wire/four-wire converting circuit

Info

Publication number
JPS6489721A
JPS6489721A JP24411187A JP24411187A JPS6489721A JP S6489721 A JPS6489721 A JP S6489721A JP 24411187 A JP24411187 A JP 24411187A JP 24411187 A JP24411187 A JP 24411187A JP S6489721 A JPS6489721 A JP S6489721A
Authority
JP
Japan
Prior art keywords
resistance
wire
variable
converting circuit
connecting point
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
JP24411187A
Other languages
Japanese (ja)
Other versions
JP2582802B2 (en
Inventor
Masanori Yamane
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP62244111A priority Critical patent/JP2582802B2/en
Publication of JPS6489721A publication Critical patent/JPS6489721A/en
Application granted granted Critical
Publication of JP2582802B2 publication Critical patent/JP2582802B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To execute the miniaturization and lightening by providing a variable resistance between the connecting point of a line impedance and a balance network and the connecting point of the fourth resistance and fifth resistance of a bridge and making the moving side of the variable resistance into the input of an amplifier. CONSTITUTION:For a winding 1a and a balance network BN, a fourth resistance R4 and a fifth resistance R5 are connected in parallel to a first resistance R1 and a second resistance R2. A variable resistance VR is connected between a connecting point (b) of the fourth resistance R4 and the fifth resistance R5 and a connecting point (c) of a line impedance ZL and a balance network BN. The output of a moving side (s) of a variable resistance VR becomes the +side input of an amplifier A. Thus, a whole gain G can be changed by the adjustment of the variable resistance VR. Thus, for the two-wire four-wire converting circuit, three resistances of resistances R4 and R5, and the variable resistance VR are added, and thus, the gain G of the two-wire four-wire converting circuit is made variable.
JP62244111A 1987-09-30 1987-09-30 2-wire 4-wire conversion circuit Expired - Lifetime JP2582802B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62244111A JP2582802B2 (en) 1987-09-30 1987-09-30 2-wire 4-wire conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62244111A JP2582802B2 (en) 1987-09-30 1987-09-30 2-wire 4-wire conversion circuit

Publications (2)

Publication Number Publication Date
JPS6489721A true JPS6489721A (en) 1989-04-04
JP2582802B2 JP2582802B2 (en) 1997-02-19

Family

ID=17113921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62244111A Expired - Lifetime JP2582802B2 (en) 1987-09-30 1987-09-30 2-wire 4-wire conversion circuit

Country Status (1)

Country Link
JP (1) JP2582802B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03150932A (en) * 1989-11-07 1991-06-27 Tokyo Electron Ind Co Ltd 2 wire/4 wire conversion circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03150932A (en) * 1989-11-07 1991-06-27 Tokyo Electron Ind Co Ltd 2 wire/4 wire conversion circuit

Also Published As

Publication number Publication date
JP2582802B2 (en) 1997-02-19

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