KR970055298A - 2-band input filter circuit - Google Patents

2-band input filter circuit Download PDF

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Publication number
KR970055298A
KR970055298A KR1019950050747A KR19950050747A KR970055298A KR 970055298 A KR970055298 A KR 970055298A KR 1019950050747 A KR1019950050747 A KR 1019950050747A KR 19950050747 A KR19950050747 A KR 19950050747A KR 970055298 A KR970055298 A KR 970055298A
Authority
KR
South Korea
Prior art keywords
signal
input
antenna
pass filter
band
Prior art date
Application number
KR1019950050747A
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Korean (ko)
Other versions
KR100190623B1 (en
Inventor
최규환
Original Assignee
이형도
삼성전기 주식회사
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Filing date
Publication date
Application filed by 이형도, 삼성전기 주식회사 filed Critical 이형도
Priority to KR1019950050747A priority Critical patent/KR100190623B1/en
Publication of KR970055298A publication Critical patent/KR970055298A/en
Application granted granted Critical
Publication of KR100190623B1 publication Critical patent/KR100190623B1/en

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Classifications

    • 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
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency

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  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Electronic Switches (AREA)

Abstract

2밴드 입력 필터회로에 관한 것으로, 안테나로부터 입력되는 고주파 신호 중에서 컷 오프 주파수 이상의 신호만을 통과시키는 하이패스 필터와, 안테나로부터 입력되는 고주파 신호 중에서 컷 오프 주파수 이하의 신호만을 통과시키는 로우패스 필터와, 전원을 인가받아 상기 로우 패스 필터에 상기 안테나로부터의 입력 신호를 출력하는 로우밴드 스위칭부와, 제어 신호를 받아 스위칭되어 전원을 상기 로우밴드 스위칭부에 인가하는 로우밴드 스위칭 제어부와, 상기 각 부를 제어하는 제어부를 구비하여 하이밴드로 입력되는 신호는 스위칭을 하지않고 로우밴드로 입력되는 신호만을 스위칭함으로써 스위칭에 필요한 스위칭 소자를 줄일 수 있다.A two-band input filter circuit comprising: a high pass filter for passing only a signal having a cutoff frequency or higher among high frequency signals input from an antenna; a low pass filter for passing only a signal having a cutoff frequency or less among a high frequency signal input from an antenna; A low band switching unit for receiving power and outputting an input signal from the antenna to the low pass filter, a low band switching control unit for receiving a control signal and applying power to the low band switching unit, and controlling the respective units It is possible to reduce the switching elements required for switching by switching only the signal input to the low band without switching the signal input to the high band with a control unit.

Description

2밴드 입력 필터회로2-band input filter circuit

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

제2도는 본 발명에 의한 2밴드 입력 필터 회로의 회로도이다.2 is a circuit diagram of a two-band input filter circuit according to the present invention.

제3도는 핀 다이오드가 도통상태가 되어 로우패스 필터와 하이 패스 필터가 동시에 동작할 때의 주파수 특성도이다.3 is a frequency characteristic diagram when the pin diode is in a conductive state and the low pass filter and the high pass filter operate simultaneously.

제4도는 핀 다이오드가 오프상태가 되어 하이 패스 필터만 동작할 때의 주파수 특성도이다.4 is a frequency characteristic diagram when the pin diode is turned off to operate only the high pass filter.

Claims (2)

안테나로부터 입력되는 신호를 믹서부로 출력하는 2밴드 입력 필터에 있어서 , 안테나로부터 입력되는 고주파 신호 중에서 컷 오프 주파수 이상의 신호만을 통과시키는 하이패스 필터와, 안테나로부터 입력되는 고주파 신호 중에서 컷 오프 주파수 이하의 신호만을 통과시키는 로우패스 필터와, 전원을 인가받아 상기 로우패스 필터에 상기 안테나로부터의 입력 신호를 출력하는 로우밴드 스위칭부와, 제어 신호를 받아 스위칭되어 전원을 상기 로우밴드 스위칭부에 인가하는 로우밴드 스위칭 제어부와, 상기 각 부를 제어하는 제어부를 구비하는 것을 특징으로 하는 2밴드 입력 필터회로.2. A two-band input filter for outputting a signal input from an antenna to a mixer section, comprising: a high pass filter for passing only a signal having a cutoff frequency or higher among high frequency signals input from the antenna, and a signal having a cutoff frequency below a high frequency signal input from the antenna; A low pass filter that passes only a bay, a low band switching unit that receives power and outputs an input signal from the antenna to the low pass filter, and a low band which receives a control signal and is switched to apply power to the low band switching unit And a switching control section and a control section for controlling the respective sections. 제1항에 있어서, 상기 로우 패스 필터는 상기 로우 밴드 스위칭부를 통하여 상기 안테나에 연결되는 것을 특징으로 하는 2밴드 입력 필터회로.The 2 band input filter circuit of claim 1, wherein the low pass filter is connected to the antenna through the low band switching unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950050747A 1995-12-15 1995-12-15 2band input filter KR100190623B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950050747A KR100190623B1 (en) 1995-12-15 1995-12-15 2band input filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950050747A KR100190623B1 (en) 1995-12-15 1995-12-15 2band input filter

Publications (2)

Publication Number Publication Date
KR970055298A true KR970055298A (en) 1997-07-31
KR100190623B1 KR100190623B1 (en) 1999-06-01

Family

ID=19440642

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950050747A KR100190623B1 (en) 1995-12-15 1995-12-15 2band input filter

Country Status (1)

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KR (1) KR100190623B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100879261B1 (en) * 2007-07-20 2009-01-16 (주)클라셋 Input matching circuit for dual band antenna

Also Published As

Publication number Publication date
KR100190623B1 (en) 1999-06-01

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