KR900001837U - Tone detection circuit - Google Patents

Tone detection circuit

Info

Publication number
KR900001837U
KR900001837U KR2019880009890U KR880009890U KR900001837U KR 900001837 U KR900001837 U KR 900001837U KR 2019880009890 U KR2019880009890 U KR 2019880009890U KR 880009890 U KR880009890 U KR 880009890U KR 900001837 U KR900001837 U KR 900001837U
Authority
KR
South Korea
Prior art keywords
detection circuit
tone detection
tone
circuit
detection
Prior art date
Application number
KR2019880009890U
Other languages
Korean (ko)
Other versions
KR910001887Y1 (en
Inventor
권정환
Original Assignee
삼성전자 주식회사
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 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority to KR2019880009890U priority Critical patent/KR910001887Y1/en
Publication of KR900001837U publication Critical patent/KR900001837U/en
Application granted granted Critical
Publication of KR910001887Y1 publication Critical patent/KR910001887Y1/en

Links

Classifications

    • 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)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
KR2019880009890U 1988-06-25 1988-06-25 Tone detection circuit KR910001887Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880009890U KR910001887Y1 (en) 1988-06-25 1988-06-25 Tone detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880009890U KR910001887Y1 (en) 1988-06-25 1988-06-25 Tone detection circuit

Publications (2)

Publication Number Publication Date
KR900001837U true KR900001837U (en) 1990-01-19
KR910001887Y1 KR910001887Y1 (en) 1991-03-28

Family

ID=19276690

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880009890U KR910001887Y1 (en) 1988-06-25 1988-06-25 Tone detection circuit

Country Status (1)

Country Link
KR (1) KR910001887Y1 (en)

Also Published As

Publication number Publication date
KR910001887Y1 (en) 1991-03-28

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Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 20010223

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee