US5032810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
LC filter
Assignee: Murata Manufacturing Co Ltd
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Filing: 1988-12-07
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Granted: 1991-07-16
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Expires: 2008-12-07
Abstract
Abstract An LC filter having electrode layers formed on opposite surfaces of a dielectric substrate. This filter includes a line electrode formed on one surface of the dielectric substrate. The line electrode extends from one electrode layer along outer edges of other electrode layers.
Inventors
- 👤 Toshimi Kaneko
- 👤 Masahiko Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:10
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/17; H03H7/1741; H03H7/175; H03H7/0115; H03H7/1758; H03H7/1775; H03H1/00; H03H2001/0021; H03H2001/0078
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
An LC filter having a capacitor-inductor combination, comprising: a dielectric substrate; at least one pair of capacitor electrode layers formed on a top surface and a bottom surface, respectively, of said dielectric substrate at opposite positions across said dielectric substrate; at least one inductor electrode layer formed on at least one surface of said dielectric substrate for constituting an LC circuit with said capacitor electrode layers; and a line electrode formed on said one surface of said dielectric substrate to extend from an electrode layer along outer edges of one of the capacitor electrode layers and the at least one inductor electrode layer, wherein an attenuation pole is formed to increase attenuation in a high frequency range with respect to a passband.
Claim 2
Dependent Claim
122 words
An LC filter having a capacitor-inductor combination, comprising: a dielectric substrate; at least one pair of capacitor electrode layers formed on a top surface and a bottom surface, respectively, of said dielectric substrate at opposite positions across said dielectric substrate; at least one inductor electrode layer formed on at least one surface of said dielectric substrate for constituting an LC circuit with said capacitor electrode layers; and a line electrode formed on said one surface of said dielectric substrate to extend from an electrode layer along outer edges of one of the capacitor electrode layers and the at least one inductor electrode layer, wherein an attenuation pole is formed to increase attenuation in a high frequency range with respect to a passband.
Claim 3
Dependent Claim
14 words
An Lc filter as claimed in claim 1, wherein said line electrode extends linearly.
Claim 4
Dependent Claim
19 words
An LC filter as claimed in claim 1, wherein said inductor electrode layer comprises printed coil in spiral form.
Claim 5
Dependent Claim
83 words
An LC filter as claimed in claim 1, wherein the capacitor electrode layers and the inductor electrode layer form a parallel circuit of a capacitor and an inductor connected between an input terminal and a grounding terminal, and a series circuit of a capacitor and an inductor connected between the input terminal and an output terminal, said line electrode comprising LC series element inserted between the grounding terminal and an intermediate connecting point in the series circuit of the capacitor and the inductor.
References Cited (Backward Citations)
US4063201A
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US4128818A
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JPS58190113A
Cited
JPS60236501A
Cited
JPS62159510A
Cited
JPS62189807A
Cited
US4701725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |