JPS5637768A - Call current supply system - Google Patents

Call current supply system

Info

Publication number
JPS5637768A
JPS5637768A JP11375279A JP11375279A JPS5637768A JP S5637768 A JPS5637768 A JP S5637768A JP 11375279 A JP11375279 A JP 11375279A JP 11375279 A JP11375279 A JP 11375279A JP S5637768 A JPS5637768 A JP S5637768A
Authority
JP
Japan
Prior art keywords
current supply
izx1
supply system
rectangular wave
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.)
Pending
Application number
JP11375279A
Other languages
Japanese (ja)
Inventor
Haruyuki Yoshino
Takashi Usami
Kenzo Hasegawa
Shogo Usuda
Kazuo Hamasato
Yoshinori Oikawa
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP11375279A priority Critical patent/JPS5637768A/en
Publication of JPS5637768A publication Critical patent/JPS5637768A/en
Pending 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
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To realize a call current supply system having a small amount of power consumption and a reduced packing space, by producing the bipolar rectangular wave through the commutation of the DC current supply with a certain frequency and then supplying this output to the load via the reactance circuit, the rectifying circuit and the LPF each. CONSTITUTION:The DC power supply E is converted into the bipolar rectangular wave of the frequency FS through the commutation switch SW-C and then rectified by the rectifying circuit REC and via the imaginary impedances IZX1 and X2 to be supplied to the telephone Tel via the line L and in the form of the DC Il after smoothing through the capacitor input and choke output type LPFs each. The IZX1 and X2 are formed by the serial connection between the capacitors C1/C2 and the inductances L1/L2. And no loss of the electric power is caused substantially since the IZ free from the resistance component is applied, and thus the power consumption is extremely small at the feeding circuit. Furthermore, the packing efficiency can be increased since the component parts are composed of the electronic parts.
JP11375279A 1979-09-04 1979-09-04 Call current supply system Pending JPS5637768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11375279A JPS5637768A (en) 1979-09-04 1979-09-04 Call current supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11375279A JPS5637768A (en) 1979-09-04 1979-09-04 Call current supply system

Publications (1)

Publication Number Publication Date
JPS5637768A true JPS5637768A (en) 1981-04-11

Family

ID=14620219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11375279A Pending JPS5637768A (en) 1979-09-04 1979-09-04 Call current supply system

Country Status (1)

Country Link
JP (1) JPS5637768A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61209298A (en) * 1984-12-21 1986-09-17 ザ、プロクタ−、エンド、ギヤンブル、カンパニ− Solvent fractionation for obtaining confectionary fat from palm oil
JPS61254143A (en) * 1985-05-02 1986-11-11 Fuji Oil Co Ltd Quality improvement of hard butter
JPS626635A (en) * 1985-03-01 1987-01-13 Kao Corp Fat-blooming inhibiting agent

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150659A (en) * 1979-05-10 1980-11-22 Philips Nv Line circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150659A (en) * 1979-05-10 1980-11-22 Philips Nv Line circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61209298A (en) * 1984-12-21 1986-09-17 ザ、プロクタ−、エンド、ギヤンブル、カンパニ− Solvent fractionation for obtaining confectionary fat from palm oil
JPS626635A (en) * 1985-03-01 1987-01-13 Kao Corp Fat-blooming inhibiting agent
JPH0121734B2 (en) * 1985-03-01 1989-04-24 Kao Corp
JPS61254143A (en) * 1985-05-02 1986-11-11 Fuji Oil Co Ltd Quality improvement of hard butter
JPH0427813B2 (en) * 1985-05-02 1992-05-12 Fuji Oil Co Ltd

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