KR890020190U - Noise canceling circuit of speaker phone - Google Patents

Noise canceling circuit of speaker phone

Info

Publication number
KR890020190U
KR890020190U KR2019880003222U KR880003222U KR890020190U KR 890020190 U KR890020190 U KR 890020190U KR 2019880003222 U KR2019880003222 U KR 2019880003222U KR 880003222 U KR880003222 U KR 880003222U KR 890020190 U KR890020190 U KR 890020190U
Authority
KR
South Korea
Prior art keywords
noise canceling
speaker phone
canceling circuit
speaker
phone
Prior art date
Application number
KR2019880003222U
Other languages
Korean (ko)
Other versions
KR910001082Y1 (en
Inventor
조명현
Original Assignee
삼성전자주식회사
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 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR2019880003222U priority Critical patent/KR910001082Y1/en
Publication of KR890020190U publication Critical patent/KR890020190U/en
Application granted granted Critical
Publication of KR910001082Y1 publication Critical patent/KR910001082Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Telephone Function (AREA)
KR2019880003222U 1988-03-11 1988-03-11 Circuit to suppress noise in the handset KR910001082Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880003222U KR910001082Y1 (en) 1988-03-11 1988-03-11 Circuit to suppress noise in the handset

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880003222U KR910001082Y1 (en) 1988-03-11 1988-03-11 Circuit to suppress noise in the handset

Publications (2)

Publication Number Publication Date
KR890020190U true KR890020190U (en) 1989-10-05
KR910001082Y1 KR910001082Y1 (en) 1991-02-21

Family

ID=19273098

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880003222U KR910001082Y1 (en) 1988-03-11 1988-03-11 Circuit to suppress noise in the handset

Country Status (1)

Country Link
KR (1) KR910001082Y1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101054818B1 (en) * 2004-11-23 2011-08-05 엘지전자 주식회사 Mobile communication terminal for noise reduction in voice output

Also Published As

Publication number Publication date
KR910001082Y1 (en) 1991-02-21

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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: 20030124

Year of fee payment: 13

EXPY Expiration of term