JPS5228807A - Secret-talk circuit - Google Patents

Secret-talk circuit

Info

Publication number
JPS5228807A
JPS5228807A JP10460375A JP10460375A JPS5228807A JP S5228807 A JPS5228807 A JP S5228807A JP 10460375 A JP10460375 A JP 10460375A JP 10460375 A JP10460375 A JP 10460375A JP S5228807 A JPS5228807 A JP S5228807A
Authority
JP
Japan
Prior art keywords
secret
talk circuit
circuit
talk
contentirol
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
JP10460375A
Other languages
Japanese (ja)
Other versions
JPS5430843B2 (en
Inventor
Hideo Ohashi
Kunitoshi Narita
Kazuhiko Sugai
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.)
Meisei Electric Co Ltd
Original Assignee
Meisei Electric Co 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 Meisei Electric Co Ltd filed Critical Meisei Electric Co Ltd
Priority to JP10460375A priority Critical patent/JPS5228807A/en
Publication of JPS5228807A publication Critical patent/JPS5228807A/en
Publication of JPS5430843B2 publication Critical patent/JPS5430843B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To obtain a circuit with small size and low production cost by means of controlling the secret-talk function with the information of contentirol line .
JP10460375A 1975-08-29 1975-08-29 Secret-talk circuit Granted JPS5228807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10460375A JPS5228807A (en) 1975-08-29 1975-08-29 Secret-talk circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10460375A JPS5228807A (en) 1975-08-29 1975-08-29 Secret-talk circuit

Publications (2)

Publication Number Publication Date
JPS5228807A true JPS5228807A (en) 1977-03-04
JPS5430843B2 JPS5430843B2 (en) 1979-10-03

Family

ID=14384985

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10460375A Granted JPS5228807A (en) 1975-08-29 1975-08-29 Secret-talk circuit

Country Status (1)

Country Link
JP (1) JPS5228807A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101081237B1 (en) 2005-07-12 2011-11-08 현대자동차주식회사 Refraction vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4845510U (en) * 1971-09-30 1973-06-14
JPS494962A (en) * 1972-04-27 1974-01-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4845510U (en) * 1971-09-30 1973-06-14
JPS494962A (en) * 1972-04-27 1974-01-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101081237B1 (en) 2005-07-12 2011-11-08 현대자동차주식회사 Refraction vehicle

Also Published As

Publication number Publication date
JPS5430843B2 (en) 1979-10-03

Similar Documents

Publication Publication Date Title
JPS5370754A (en) Pulse signal control circuit
JPS527771A (en) Electronic timepiece with keyboard
JPS5216943A (en) Analog operation circuit
JPS5228807A (en) Secret-talk circuit
JPS5227663A (en) Multi-function electronic timepiece
JPS5211066A (en) Disital watch furnished with brightness control
JPS5223287A (en) Electronic chime
JPS51149763A (en) Lagical circuit
JPS5277569A (en) Logical circuit
JPS5271140A (en) Memory circuit
JPS5216107A (en) Signal judging circuit
JPS5216099A (en) Plte carber
JPS5223249A (en) Relay flip-flop circuit
JPS5255355A (en) Circulator
JPS51123053A (en) Logic circuit
JPS51149765A (en) Cagicol circuit
JPS5235901A (en) Selective station display circuit
JPS52146540A (en) Three-level memory circuit
AU505300B2 (en) Production tetrahydrofuran
JPS5238785A (en) Electronic flaalsher
JPS51146840A (en) Photogyrator circuit
JPS51126018A (en) Mnos control circuit
JPS51139297A (en) Illuminating means for planar display element
JPS5274201A (en) Display control circuit for key telephone system
JPS51132730A (en) Memory circuit