Title:
積層型ローパスフィルタ
Document Type and Number:
Japanese Patent JP4784017
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a low-pass filter circuit and a laminated low-pass filter, which are small and are capable of obtaining proper electrical characteristics, without requiring a ground terminal. SOLUTION: A laminated low-pass filter 11 has a π-type tertiary low-pass filter LPF1, consisting of a resonant coil L11 and resonant capacitors C11, C12, and a π-type tertiary low-pass filter LPF2, consisting of a resonant coil L12 and resonating capacitors C14, C15. That is, two filters LPF1 and LPF2 are electrically connected in between input terminals 24, 25 and output terminals 26, 27. The capacitor C11, C12 and C14, C15 of the respective filters LPF1 and LPF2 are subjected to comb line couplings at each end thereof.
Inventors:
Tomoko Saito
Hiroshi Masuda
Tokiko Kato
Hiroshi Masuda
Tokiko Kato
Application Number:
JP2001244879A
Publication Date:
September 28, 2011
Filing Date:
August 10, 2001
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01F27/00; H03H7/075; H01G4/40
Domestic Patent References:
| JP7010914U | ||||
| JP10083921A | ||||
| JP3080505U | ||||
| JP2001111372A | ||||
| JP11205065A | ||||
| JP2000236269A |
Attorney, Agent or Firm:
Takeichi Morishita
Tani Kazuhiro
Tani Kazuhiro