KR950031641A - Pre-emphasis time constant change circuit - Google Patents

Pre-emphasis time constant change circuit Download PDF

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Publication number
KR950031641A
KR950031641A KR1019940010939A KR19940010939A KR950031641A KR 950031641 A KR950031641 A KR 950031641A KR 1019940010939 A KR1019940010939 A KR 1019940010939A KR 19940010939 A KR19940010939 A KR 19940010939A KR 950031641 A KR950031641 A KR 950031641A
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KR
South Korea
Prior art keywords
time constant
emphasis
circuit
modulation stage
diode
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Application number
KR1019940010939A
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Korean (ko)
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KR960011414B1 (en
Inventor
권경수
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이형도
삼성전기 주식회사
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Priority to KR1019940010939A priority Critical patent/KR960011414B1/en
Publication of KR950031641A publication Critical patent/KR950031641A/en
Application granted granted Critical
Publication of KR960011414B1 publication Critical patent/KR960011414B1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2210/00—Indexing scheme relating to details of tunable filters
    • H03H2210/04—Filter calibration method
    • H03H2210/043—Filter calibration method by measuring time constant

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  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Transmitters (AREA)

Abstract

본 발명은 단일회로로 구성되는 FM 변조단 입력오디오 신호 강조용 프레엠파시스로부터 2가지 이상의 시정수값을 발생시키기 위한 프리엠파시스 시정수변경회로에 관한 것이다.The present invention relates to a pre-emphasis time constant change circuit for generating two or more time constant values from a pre-emphasis for emphasizing an input audio signal of an FM modulation stage composed of a single circuit.

본 발명은 특징은 프리엠파시스 시정수값을 결정하는 저항을 이분화시켜 놓고 그중 하나가 외부인가 전압인 방송방식 선택전압으로 온/오프 제어되는 스위칭 다이오드에 의해 선택적으로 단락되게 구성하는데 있다.The present invention is characterized in that the resistor for determining the pre-emphasis time constant value is divided into two parts, and one of them is selectively shorted by a switching diode controlled on / off by a broadcast method selection voltage, which is an externally applied voltage.

또한 핀파오드의 인가전압 크기에 따른 가변 저항값 특성을 이용하여 2가지 이상의 시정수값을 얻을 수 있는 구성도 제안한다.In addition, a configuration that can obtain two or more time constant values by using the variable resistance value characteristics according to the magnitude of the applied voltage of the pin power is also proposed.

이에 따라 다방송방식 수신 시스템에 있어서의 오디오 신호 FM 변조시에 요구되는 프리엠파시스 회로의 구성을 간략화 시킬 수 있게 된다.Accordingly, it is possible to simplify the configuration of the pre-emphasis circuit required for the audio signal FM modulation in the multi-broadcast reception system.

Description

프리엠파스시 시정수 변경회로Pre-emphasis time constant change circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 팜/NTSC 방송방식 선택을 위한 오디오 FM 변조용 프리엠파시스 시정수 변경회로도.2 is a pre-emphasis time constant change circuit diagram for audio FM modulation for palm / NTSC broadcasting system selection according to the present invention.

Claims (2)

방송방식별 오디오 입력신호를 서로 다른 시정수 값을 가지고 프리엠파시스시켜 FM 변조단에 전달하는 프리엠파시스 회로에 있어서, 오디오 신호를 입력하는 커플링 콘덴서(C11)와 FM 변조단(14) 사이에 직렬 접속된 제1,2 저항(R11,R12)과 콘덴서(C12)를 삽입하고, 상기 제1,2 저항(R11,R12)의 접속점에는 수신 방송방식에 따라 선택적으로 발생하는 방송방식 선택전압(V1)이 인가되는 스위칭 다이오드(D11)의 애노드측을 연결하고, 상기 스위칭 다이오드(D11)의 캐소드측은 FM 변조단(14)의 입력단에 접속된 오디오 레벨조정 및 바이어스 저항(R13)을 연결하는 것으로, 상기 방송방식 선택전압(V1)으로 온/오프 동작하는 스위칭 다이오드(D11)에 의해 상기 제2 저항(R12)이 선택적으로 단락되게 구성하여 제1,2 시정수 값을 발생시키는 것을 특징으로 하는 프리엠파시스 시정수 변경회로.In the pre-emphasis circuit for pre-emphasis the audio input signal by broadcasting method with different time constant value to the FM modulation stage, the coupling capacitor (C 11 ) and the FM modulation stage 14 for inputting the audio signal The first and second resistors R 11 and R 12 and the capacitor C 12 connected in series are inserted therebetween, and selectively connected to the connection points of the first and second resistors R 11 and R 12 according to the reception broadcast method. Connect the anode side of the switching diode D 11 to which the generated broadcasting method selection voltage V 1 is applied, and the cathode side of the switching diode D 11 is connected to an input level of the FM modulation stage 14. And a bias resistor (R 13 ), so that the second resistor (R 12 ) is selectively shorted by a switching diode (D 11 ) operating on / off with the broadcast mode selection voltage (V 1 ). Generating first and second time constant values Li-emphasis time constant circuit can be changed. 방송방식별 오디오 입력신호를 서로 다른 시정수 값을 가지고 프리엠파시스시켜 FM 변조단에 전달하는 프리엠파시스회로에 있어서, 오디오 신호를 입력하는 커플링 콘덴서(C11)와 FM 변조단(14) 사이에 직렬 접속된 고정 저항(R11)및 핀 다이오드(D12)와 콘덴서(C12)를 삽입하고, 상기 고정저항(R11)및 핀 다이오드(D|12)의 접속적인 핀다이오드 애노드측에는 상기 핀다이오드(D12)의 저항값을 변경하기 위한 제1,2 레벨을 갖는 방송방식 선택전압(V2)이 인가되게 연결하고, 상기 핀 다이오드(D12)의 캐소드측에 연결된 FM 변조단(14)의 입력단에는 오디오 레벨 조정및 바이어스 저항(R13)을 연결하는 것으로, 방송방식 선택 전압(V2)의 제1,2 레벨에 따라 핀다이오드(D12)의 내부저항 값이 변경되게 하여 제1,2 시정수값을 발생시키는 것을 특징으로 하는 프리엠파시스 시정수 변경회로.In the pre-emphasis circuit for pre-emphasis the audio input signal for each broadcasting method with different time constant value to pass to the FM modulation stage, the coupling capacitor (C 11 ) and the FM modulation stage 14 for inputting the audio signal A fixed resistor (R 11 ) and a pin diode (D 12 ) and a capacitor (C 12 ) connected in series are inserted between the pinned diode anode side of the fixed resistor (R 11 ) and the pin diode (D | 12 ). the pin diode (D 12) select the broadcasting system having a first and a second level for changing the resistance value of the voltage (V 2) connected in the application of, and FM modulation is connected to the cathode of the pin diode (D 12) only An audio level adjustment and a bias resistor R 13 are connected to an input terminal of the 14 to change the internal resistance value of the pin diode D 12 according to the first and second levels of the broadcast method selection voltage V 2 . To generate first and second time constants. -Emphasis time constant change circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940010939A 1994-05-19 1994-05-19 Time constant change circuit KR960011414B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940010939A KR960011414B1 (en) 1994-05-19 1994-05-19 Time constant change circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940010939A KR960011414B1 (en) 1994-05-19 1994-05-19 Time constant change circuit

Publications (2)

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KR950031641A true KR950031641A (en) 1995-12-20
KR960011414B1 KR960011414B1 (en) 1996-08-22

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KR1019940010939A KR960011414B1 (en) 1994-05-19 1994-05-19 Time constant change circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7583753B2 (en) 2004-08-16 2009-09-01 Samsung Electronics Co., Ltd. Methods and transmitters for loop-back adaptive pre-emphasis data transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7583753B2 (en) 2004-08-16 2009-09-01 Samsung Electronics Co., Ltd. Methods and transmitters for loop-back adaptive pre-emphasis data transmission
US8699585B2 (en) 2004-08-16 2014-04-15 Samsung Electronics Co., Ltd. Transmitters for loop-back adaptive pre-emphasis data transmission

Also Published As

Publication number Publication date
KR960011414B1 (en) 1996-08-22

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