JPS5553914A - Filter circuit - Google Patents

Filter circuit

Info

Publication number
JPS5553914A
JPS5553914A JP12803478A JP12803478A JPS5553914A JP S5553914 A JPS5553914 A JP S5553914A JP 12803478 A JP12803478 A JP 12803478A JP 12803478 A JP12803478 A JP 12803478A JP S5553914 A JPS5553914 A JP S5553914A
Authority
JP
Japan
Prior art keywords
featuring
filter circuit
signal
resistance
port
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
JP12803478A
Other languages
Japanese (ja)
Inventor
Yoshikazu Doi
Osahisa Furuya
Toshio Takahara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP12803478A priority Critical patent/JPS5553914A/en
Publication of JPS5553914A publication Critical patent/JPS5553914A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Filters And Equalizers (AREA)

Abstract

PURPOSE: To secure passing only for the basic wave by forming the filter circuit with the fixed curcuit constant, thus absorbing the higher harmonic into the filter circuit with no reflection toward the input side.
CONSTITUTION: Line 2 of characteristic impedance Z0 and featuring the length of λS/8, λS: basic wavelength at pass band, resistance 4 featuring resistance value R0 equal to impedance Z0 plus lines 5 and 6 featuring λS/4 length are provided between input/output ports 1 and 3. Thus the filter circuit is formed. Now with supply of the signal featuring basic wave frequency fS from port 1, signal fS has virtually no attenuation to pass through port 3. Then with supply of 2nd higher harmonic 2fS, line 6 is short-circuited to then feature the open state when viewed from port 1. On the other hand, line 5 is short-circuited to the earth end. Thus this circuit is terminated by resistance R0 to signal 2fS. In such way, the blocked signal is not reflected but absorbed by resistance 4.
COPYRIGHT: (C)1980,JPO&Japio
JP12803478A 1978-10-18 1978-10-18 Filter circuit Pending JPS5553914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12803478A JPS5553914A (en) 1978-10-18 1978-10-18 Filter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12803478A JPS5553914A (en) 1978-10-18 1978-10-18 Filter circuit

Publications (1)

Publication Number Publication Date
JPS5553914A true JPS5553914A (en) 1980-04-19

Family

ID=14974872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12803478A Pending JPS5553914A (en) 1978-10-18 1978-10-18 Filter circuit

Country Status (1)

Country Link
JP (1) JPS5553914A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014220751A (en) * 2013-05-10 2014-11-20 三菱電機株式会社 Harmonic processing circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014220751A (en) * 2013-05-10 2014-11-20 三菱電機株式会社 Harmonic processing circuit

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