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JPS5459055A - Variable attenuator to signals at specified frequency band - Google Patents

Variable attenuator to signals at specified frequency band

Info

Publication number
JPS5459055A
JPS5459055A JP12599177A JP12599177A JPS5459055A JP S5459055 A JPS5459055 A JP S5459055A JP 12599177 A JP12599177 A JP 12599177A JP 12599177 A JP12599177 A JP 12599177A JP S5459055 A JPS5459055 A JP S5459055A
Authority
JP
Japan
Prior art keywords
cut
bpf1
pass band
octave
frequency
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP12599177A
Other languages
Japanese (ja)
Other versions
JPS5928289B2 (en
Inventor
Takaaki Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP12599177A priority Critical patent/JPS5928289B2/en
Publication of JPS5459055A publication Critical patent/JPS5459055A/en
Publication of JPS5928289B2 publication Critical patent/JPS5928289B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/24—Frequency-independent attenuators

Landscapes

  • Filters And Equalizers (AREA)
  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To ensure the steady and variable adjustment for the attenuation quantity to the signal component in the fixed frequency range, by istalling in parallel the BPF's featuring the slope cut-off properties of 12dB and 6dB oer octave respectively into the negative feedback path. CONSTITUTION:Inputsignal 12 is applied to subtractor SUB as the reduced signal, and the output signal given from SUB is amplified (AMP) to be given to output terminal 13. And the output signal is then negatively fed back to SUB via the parallel circuit of first BPF1 and second BPF2. BPF1, consisting of the series circuit of primary HPF1 of cut-off frequency fh and primary LPF1 of cut-off frequency f, shows such pass band characteristics that the slope of the frequency response characteristics curve may be 6dB per octave from the pass band through he cut-off region. While BPF2 features the similar constitution to BPF1 and shows the pass band characteristics of 12dB fer octave.
JP12599177A 1977-10-20 1977-10-20 Variable attenuator for signals in specific frequency bands Expired JPS5928289B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12599177A JPS5928289B2 (en) 1977-10-20 1977-10-20 Variable attenuator for signals in specific frequency bands

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12599177A JPS5928289B2 (en) 1977-10-20 1977-10-20 Variable attenuator for signals in specific frequency bands

Publications (2)

Publication Number Publication Date
JPS5459055A true JPS5459055A (en) 1979-05-12
JPS5928289B2 JPS5928289B2 (en) 1984-07-12

Family

ID=14924013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12599177A Expired JPS5928289B2 (en) 1977-10-20 1977-10-20 Variable attenuator for signals in specific frequency bands

Country Status (1)

Country Link
JP (1) JPS5928289B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064515A (en) * 1983-09-19 1985-04-13 Fujitsu Ltd Variable amplitude equalizer
JP2013258548A (en) * 2012-06-12 2013-12-26 Denso Corp High frequency band rejection filter and filter circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064515A (en) * 1983-09-19 1985-04-13 Fujitsu Ltd Variable amplitude equalizer
JPH0133965B2 (en) * 1983-09-19 1989-07-17 Fujitsu Ltd
JP2013258548A (en) * 2012-06-12 2013-12-26 Denso Corp High frequency band rejection filter and filter circuit

Also Published As

Publication number Publication date
JPS5928289B2 (en) 1984-07-12

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