JPS5487456A - Band-pass filter of band switching type - Google Patents

Band-pass filter of band switching type

Info

Publication number
JPS5487456A
JPS5487456A JP15541977A JP15541977A JPS5487456A JP S5487456 A JPS5487456 A JP S5487456A JP 15541977 A JP15541977 A JP 15541977A JP 15541977 A JP15541977 A JP 15541977A JP S5487456 A JPS5487456 A JP S5487456A
Authority
JP
Japan
Prior art keywords
band
inductances
terminal
circuit
capacitor
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.)
Pending
Application number
JP15541977A
Other languages
Japanese (ja)
Inventor
Fumio Ishikawa
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP15541977A priority Critical patent/JPS5487456A/en
Publication of JPS5487456A publication Critical patent/JPS5487456A/en
Pending 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
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1291—Current or voltage controlled filters

Landscapes

  • Filters And Equalizers (AREA)

Abstract

PURPOSE:To obtain a filter which is able to make a changeover between two different passing frequency bands with its circuit constitution simplified, and to switch the band width of the passing frequency band to a different band. CONSTITUTION:Input terminal T1 of high-frequency inter-stage tuning circuit 35 is grounded via capacitor Cs and connected to one terminal of the 1st series circuit of inductances L5 and L6 with the other terminal grounded via the 2nd series circuit of inductances L9 and L10. In addition, the terminal is connected to output terminal T2 via the 3rd series circuit of inductances L7 and L8 and capacitor C15, and the middle point between the 1st and 3rd series circuits is gorunded via capacitor 20; and then, inductances L6, L7 and L10 are connected in parallel to switching elements D2, D3 and D4, and switching element D5 is connected in series to capacitor 20. Switching elements D2 to D5 are all controlled by a switching control voltage from low band/high band switching control circuit 36, thereby making a changeover between low and high bands.
JP15541977A 1977-12-23 1977-12-23 Band-pass filter of band switching type Pending JPS5487456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15541977A JPS5487456A (en) 1977-12-23 1977-12-23 Band-pass filter of band switching type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15541977A JPS5487456A (en) 1977-12-23 1977-12-23 Band-pass filter of band switching type

Publications (1)

Publication Number Publication Date
JPS5487456A true JPS5487456A (en) 1979-07-11

Family

ID=15605578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15541977A Pending JPS5487456A (en) 1977-12-23 1977-12-23 Band-pass filter of band switching type

Country Status (1)

Country Link
JP (1) JPS5487456A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099040A2 (en) * 1982-07-13 1984-01-25 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Filter with switchable bandwidth

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099040A2 (en) * 1982-07-13 1984-01-25 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Filter with switchable bandwidth

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