JPS5487046A - Band pass filter with trap - Google Patents

Band pass filter with trap

Info

Publication number
JPS5487046A
JPS5487046A JP15490377A JP15490377A JPS5487046A JP S5487046 A JPS5487046 A JP S5487046A JP 15490377 A JP15490377 A JP 15490377A JP 15490377 A JP15490377 A JP 15490377A JP S5487046 A JPS5487046 A JP S5487046A
Authority
JP
Japan
Prior art keywords
frequency
capacitor
coil
inductor
pass filter
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
JP15490377A
Other languages
Japanese (ja)
Other versions
JPS6038892B2 (en
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 JP15490377A priority Critical patent/JPS6038892B2/en
Publication of JPS5487046A publication Critical patent/JPS5487046A/en
Publication of JPS6038892B2 publication Critical patent/JPS6038892B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes

Abstract

PURPOSE:To vary both the central frequency and the trap frequency at once for the pass frequency band by adding the inductor and the capacitor to the band pass filter of the PI-type circuit comprising the capacitor, inductor and variable capacity diode. CONSTITUTION:Input terminal T1 is earthed via capacitor C1; terminal T1 is connected to one end of the serial circuit of inductor coil L1 and variable capacity element VC; and the other end of the serial circuit is earthed via inductor coil L2 as well as to the output terminal through inductor coil L3. And capacitor C2 is connected in parallel to the series circuit of coil L1, element VC and coil L3. When the band pass filter is applied to the high frequency inter-step tuning circuit of the UHF TV tuner, the image signal of the sum frequency of the double intermediate frequency and the frequency of the UHF TV signal is trapped.
JP15490377A 1977-12-22 1977-12-22 Bandpass filter with trap Expired JPS6038892B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15490377A JPS6038892B2 (en) 1977-12-22 1977-12-22 Bandpass filter with trap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15490377A JPS6038892B2 (en) 1977-12-22 1977-12-22 Bandpass filter with trap

Publications (2)

Publication Number Publication Date
JPS5487046A true JPS5487046A (en) 1979-07-11
JPS6038892B2 JPS6038892B2 (en) 1985-09-03

Family

ID=15594472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15490377A Expired JPS6038892B2 (en) 1977-12-22 1977-12-22 Bandpass filter with trap

Country Status (1)

Country Link
JP (1) JPS6038892B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61179821U (en) * 1985-04-26 1986-11-10

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103023452B (en) * 2011-09-21 2016-04-20 北京北方微电子基地设备工艺研究中心有限责任公司 Filter circuit and the dual frequency plasma processing unit with it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61179821U (en) * 1985-04-26 1986-11-10

Also Published As

Publication number Publication date
JPS6038892B2 (en) 1985-09-03

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