KR910010952A - Volume control circuit of telephone ring signal - Google Patents

Volume control circuit of telephone ring signal Download PDF

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Publication number
KR910010952A
KR910010952A KR1019890017313A KR890017313A KR910010952A KR 910010952 A KR910010952 A KR 910010952A KR 1019890017313 A KR1019890017313 A KR 1019890017313A KR 890017313 A KR890017313 A KR 890017313A KR 910010952 A KR910010952 A KR 910010952A
Authority
KR
South Korea
Prior art keywords
volume control
ring signal
control circuit
telephone ring
resistor
Prior art date
Application number
KR1019890017313A
Other languages
Korean (ko)
Other versions
KR940008109B1 (en
Inventor
이돈섭
Original Assignee
김용원
대우전자 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 김용원, 대우전자 주식회사 filed Critical 김용원
Priority to KR1019890017313A priority Critical patent/KR940008109B1/en
Publication of KR910010952A publication Critical patent/KR910010952A/en
Application granted granted Critical
Publication of KR940008109B1 publication Critical patent/KR940008109B1/en

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Classifications

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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

내용 없음No content

Description

전화기 링 신호의 음량 조절회로Volume control circuit of telephone ring signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 회로도.1 is a circuit diagram of the present invention.

Claims (2)

전화기의 링 신호 발생기(1)에 스피커(3)가 연결된 통상의 음량조절장치에 있어서 광센서에 의해 자동음량 조절되는 전화기 링 신호의 음량조절회로.A volume control circuit of a telephone ring signal which is automatically adjusted by an optical sensor in a conventional volume control device in which a speaker (3) is connected to a ring signal generator (1) of a telephone. 1항에 있어서 트랜지스터(Q)베이스단에 광센서(2)와 저항(R1)을 직렬 접속하되 링 신호발생기(1)의 출력신호를 트랜지스터(Q)콜렉터측과 저항(R1)을 통하여 광센서(2) 및 저항(R2)사이에 각각 인가하는 한편 트랜지스터(Q)출력단인 에미터에는 스피커(3)일측단을 접속하고 상기 스피커(3)의 타측단자를 저항(R2)과 링신호 발생기(1)에 연결하여서된 것을 특징으로 하는 전화기 링 신호의 음량조절회로.The optical sensor 2 and the resistor R1 are connected in series to the base of the transistor Q, and the output signal of the ring signal generator 1 is transmitted through the transistor Q collector side and the resistor R 1 . One end is applied between the sensor 2 and the resistor R 2 , while one end of the speaker 3 is connected to the emitter, which is an output of the transistor Q, and the other end of the speaker 3 is connected to the resistor R 2 and the ring. Volume control circuit of the telephone ring signal, characterized in that connected to the signal generator (1). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890017313A 1989-11-28 1989-11-28 Telephone ringing control circuit KR940008109B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890017313A KR940008109B1 (en) 1989-11-28 1989-11-28 Telephone ringing control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890017313A KR940008109B1 (en) 1989-11-28 1989-11-28 Telephone ringing control circuit

Publications (2)

Publication Number Publication Date
KR910010952A true KR910010952A (en) 1991-06-29
KR940008109B1 KR940008109B1 (en) 1994-09-02

Family

ID=19292155

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890017313A KR940008109B1 (en) 1989-11-28 1989-11-28 Telephone ringing control circuit

Country Status (1)

Country Link
KR (1) KR940008109B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10540881B2 (en) 2010-04-07 2020-01-21 Clean Hands Safe Hands Llc Systems and methods for pattern recognition and individual detection
US10467884B2 (en) 2010-04-07 2019-11-05 Clean Hands Safe Hands Llc Systems for monitoring hand sanitization
US10223895B2 (en) 2010-04-07 2019-03-05 Clean Hands Safe Hands Llc Systems for monitoring hand sanitization
US9123233B2 (en) 2010-04-07 2015-09-01 Clean Hands Safe Hands Systems for monitoring hand sanitization
US10282969B2 (en) 2013-06-19 2019-05-07 Clean Hands Safe Hands System and methods for wireless hand hygiene monitoring

Also Published As

Publication number Publication date
KR940008109B1 (en) 1994-09-02

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