JPS5625816A - Filter unit - Google Patents

Filter unit

Info

Publication number
JPS5625816A
JPS5625816A JP9301879A JP9301879A JPS5625816A JP S5625816 A JPS5625816 A JP S5625816A JP 9301879 A JP9301879 A JP 9301879A JP 9301879 A JP9301879 A JP 9301879A JP S5625816 A JPS5625816 A JP S5625816A
Authority
JP
Japan
Prior art keywords
band
resonance
frequency
resonance circuit
pass
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
JP9301879A
Other languages
Japanese (ja)
Inventor
Osamu Shizutani
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9301879A priority Critical patent/JPS5625816A/en
Publication of JPS5625816A publication Critical patent/JPS5625816A/en
Pending legal-status Critical Current

Links

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
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1775—Parallel LC in shunt or branch path
    • 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
    • H03H7/075—Ladder networks, e.g. electric wave filters

Landscapes

  • Filters And Equalizers (AREA)

Abstract

PURPOSE:To improve the group delay characteristics, by providing the resonance circuit in resonance outside the pass band, in the resonance circuit constituting the band pass filter. CONSTITUTION:The three stages of parallel resonance circuits 1, 2, 3 are coupled with the coupling capacitor and the series resonance circuit 4 having the resonance frequency f1 higher than the band pass frequency is provided in the parallel resonance circuit 3. The series resonance circuit 4 has the impedance which can be regarded as a simple capacitance C3 at the center frequency f0 of the band and also acts like the attenuation pole of filter at the higher resonance frequency f1. Thus, the attenuation at the block frequency band can sufficiently be taken greater while keeping the same band characteristics as conventional units.
JP9301879A 1979-07-20 1979-07-20 Filter unit Pending JPS5625816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9301879A JPS5625816A (en) 1979-07-20 1979-07-20 Filter unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9301879A JPS5625816A (en) 1979-07-20 1979-07-20 Filter unit

Publications (1)

Publication Number Publication Date
JPS5625816A true JPS5625816A (en) 1981-03-12

Family

ID=14070724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9301879A Pending JPS5625816A (en) 1979-07-20 1979-07-20 Filter unit

Country Status (1)

Country Link
JP (1) JPS5625816A (en)

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