JPS54127608A - Input signal identification circuit - Google Patents

Input signal identification circuit

Info

Publication number
JPS54127608A
JPS54127608A JP3797278A JP3797278A JPS54127608A JP S54127608 A JPS54127608 A JP S54127608A JP 3797278 A JP3797278 A JP 3797278A JP 3797278 A JP3797278 A JP 3797278A JP S54127608 A JPS54127608 A JP S54127608A
Authority
JP
Japan
Prior art keywords
input signal
capacitor
charging
level
interrupted
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
JP3797278A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6245741B2 (enrdf_load_stackoverflow
Inventor
Hideyuki Nagashima
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo 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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP3797278A priority Critical patent/JPS54127608A/ja
Publication of JPS54127608A publication Critical patent/JPS54127608A/ja
Publication of JPS6245741B2 publication Critical patent/JPS6245741B2/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
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
JP3797278A 1978-03-27 1978-03-27 Input signal identification circuit Granted JPS54127608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3797278A JPS54127608A (en) 1978-03-27 1978-03-27 Input signal identification circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3797278A JPS54127608A (en) 1978-03-27 1978-03-27 Input signal identification circuit

Publications (2)

Publication Number Publication Date
JPS54127608A true JPS54127608A (en) 1979-10-03
JPS6245741B2 JPS6245741B2 (enrdf_load_stackoverflow) 1987-09-29

Family

ID=12512468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3797278A Granted JPS54127608A (en) 1978-03-27 1978-03-27 Input signal identification circuit

Country Status (1)

Country Link
JP (1) JPS54127608A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01138235U (enrdf_load_stackoverflow) * 1988-03-08 1989-09-21

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50120507A (enrdf_load_stackoverflow) * 1974-03-06 1975-09-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50120507A (enrdf_load_stackoverflow) * 1974-03-06 1975-09-20

Also Published As

Publication number Publication date
JPS6245741B2 (enrdf_load_stackoverflow) 1987-09-29

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