JPS6437148A - Induced voltage protective circuit - Google Patents

Induced voltage protective circuit

Info

Publication number
JPS6437148A
JPS6437148A JP19396887A JP19396887A JPS6437148A JP S6437148 A JPS6437148 A JP S6437148A JP 19396887 A JP19396887 A JP 19396887A JP 19396887 A JP19396887 A JP 19396887A JP S6437148 A JPS6437148 A JP S6437148A
Authority
JP
Japan
Prior art keywords
circuit
speaker
incoming
induced voltage
voltage protective
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
JP19396887A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Yamaguchi
Masami Tokuda
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
Original Assignee
Fujitsu Ltd
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 filed Critical Fujitsu Ltd
Priority to JP19396887A priority Critical patent/JPS6437148A/en
Publication of JPS6437148A publication Critical patent/JPS6437148A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To use an acoustic device for incoming indication as well as reception by connecting the sound connection terminal of a ringer circuit and the speaker connection terminal of a speaking circuit to a speaker through an induced voltage protective circuit. CONSTITUTION:In case of incoming, the incoming indicator tone outputted to sound terminals SD1 and SD2 of a ringer circuit 1 is sent to a speaker 8 through a winding 13a of an induced voltage protective circuit 12. Meanwhile, when a reception voice is outputted to speaker connection terminals SP1 and SP2 of a speaking circuit 5, this reception voice is transmitted to the speaker 8 through an input winding 13b. A breaking means 100 breaks the circuit between connection terminals SP1 and SP2 and the input winding 13b when a voltage is not generated between a pair of connection terminals SP1 and SP2 of the speaking circuit 5, thereby preventing the incoming tone from being induced in the speaking circuit 5.
JP19396887A 1987-08-03 1987-08-03 Induced voltage protective circuit Pending JPS6437148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19396887A JPS6437148A (en) 1987-08-03 1987-08-03 Induced voltage protective circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19396887A JPS6437148A (en) 1987-08-03 1987-08-03 Induced voltage protective circuit

Publications (1)

Publication Number Publication Date
JPS6437148A true JPS6437148A (en) 1989-02-07

Family

ID=16316764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19396887A Pending JPS6437148A (en) 1987-08-03 1987-08-03 Induced voltage protective circuit

Country Status (1)

Country Link
JP (1) JPS6437148A (en)

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