KR880005376U - Variable preamplifier circuit - Google Patents

Variable preamplifier circuit

Info

Publication number
KR880005376U
KR880005376U KR2019860011847U KR860011847U KR880005376U KR 880005376 U KR880005376 U KR 880005376U KR 2019860011847 U KR2019860011847 U KR 2019860011847U KR 860011847 U KR860011847 U KR 860011847U KR 880005376 U KR880005376 U KR 880005376U
Authority
KR
South Korea
Prior art keywords
preamplifier circuit
variable preamplifier
variable
circuit
preamplifier
Prior art date
Application number
KR2019860011847U
Other languages
Korean (ko)
Other versions
KR890007292Y1 (en
Inventor
남규영
Original Assignee
주식회사 금성사
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 주식회사 금성사 filed Critical 주식회사 금성사
Priority to KR2019860011847U priority Critical patent/KR890007292Y1/en
Publication of KR880005376U publication Critical patent/KR880005376U/en
Application granted granted Critical
Publication of KR890007292Y1 publication Critical patent/KR890007292Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices
KR2019860011847U 1986-08-06 1986-08-06 Amplification extent variable circuit of pre-amp KR890007292Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860011847U KR890007292Y1 (en) 1986-08-06 1986-08-06 Amplification extent variable circuit of pre-amp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860011847U KR890007292Y1 (en) 1986-08-06 1986-08-06 Amplification extent variable circuit of pre-amp

Publications (2)

Publication Number Publication Date
KR880005376U true KR880005376U (en) 1988-05-12
KR890007292Y1 KR890007292Y1 (en) 1989-10-25

Family

ID=19254788

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019860011847U KR890007292Y1 (en) 1986-08-06 1986-08-06 Amplification extent variable circuit of pre-amp

Country Status (1)

Country Link
KR (1) KR890007292Y1 (en)

Also Published As

Publication number Publication date
KR890007292Y1 (en) 1989-10-25

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