US3603902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature broad band low pass filters with multiturn tape wound inductors
Assignee: Individual
•
Filing: 1969-07-14
•
Granted: 1971-09-07
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Expires: 1989-07-14
Abstract
Abstract A miniature broadband high frequency low pass filter having at least one multiturn tape wound core inductor and at least one ceramic capacitor whereby the resultant filter exhibits improved insertion loss characteristics even in filter applications having certain amounts of DC or low frequency current passing therethrough.
Inventors
- 👤 Peter A Denes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:53
CPC Classifications
H; H01; H01G; H01G2/00; H03; H03H; H03H1/00; H03H1/0007; H03H2001/0021; H03H2001/0035; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A broadband low pass filter having at least one multilayer ceramic capacitor therein comprising: a. at least one inductor having a hollow ferromagnetic tape wound core with a insulating layer between the tape windings of said core, the tape windings of said core being disposed upon one another with negligible axial displacement; and b. a plurality of wire windings formed from a single wire of a given length inserted through said hollow inductor and around said inductor to form a multiturn inductor which is operatively connected in said filter.
Claim 2
Dependent Claim
89 words
A broadband low pass filter having at least one multilayer ceramic capacitor therein comprising: a. at least one inductor having a hollow ferromagnetic tape wound core with a insulating layer between the tape windings of said core, the tape windings of said core being disposed upon one another with negligible axial displacement; and b. a plurality of wire windings formed from a single wire of a given length inserted through said hollow inductor and around said inductor to form a multiturn inductor which is operatively connected in said filter.
Claim 3
Dependent Claim
41 words
The low pass filter described in claim 1 in which said tape wound core is formed from a ferromagnetic material selected from the group consisting of iron, cobalt and alloys of iron-cobalt and alloys of the said group with nonferromagnetic metals.
Claim 4
Dependent Claim
41 words
The low pass filter described in claim 1 in which said tape wound core is formed from a ferromagnetic material selected from the group consisting of alloys of iron-nickel, cobalt-nickel and iron-cobalt-nickel, and alloys of the said group with nonferromagnetic metals.
Claim 5
Dependent Claim
32 words
The low pass filter described in claim 1 in which said tape wound core is formed from a tape having a thickness in the range of approximately 0.00004 inch to 0.001 inch.
Claim 6
Dependent Claim
23 words
The low pass filter described in claim 2 in which said ferromagnetic material has a saturation induction in excess of about 16,000 Gauss.
Claim 7
Dependent Claim
88 words
A broad band low pass filter comprising: a. a metal encLosure; b. at least one ceramic multilayer capacitor located in said enclosure; c. at least one multiturn ferromagnetic tape wound core operatively connected to said capacitor to form a given filter circuit, the tape windings of said core being disposed upon one another with negligible axial displacement; and d. said multiturn core having a single wire wound through and around said core with the wire ends extending through said enclosure to form external connection points for said filter.
Claim 8
Dependent Claim
88 words
A broad band low pass filter comprising: a. a metal encLosure; b. at least one ceramic multilayer capacitor located in said enclosure; c. at least one multiturn ferromagnetic tape wound core operatively connected to said capacitor to form a given filter circuit, the tape windings of said core being disposed upon one another with negligible axial displacement; and d. said multiturn core having a single wire wound through and around said core with the wire ends extending through said enclosure to form external connection points for said filter.
Claim 9
Dependent Claim
41 words
The low pass filter described in claim 6 in which said tape wound core is formed from a ferromagnetic material selected from the group consisting of iron, cobalt and alloys of iron-cobalt and alloys of the said group with nonferromagnetic metals.
Claim 10
Dependent Claim
41 words
The low pass filter described in claim 6 in which said tape wound core is formed from a ferromagnetic material selected from the group consisting of alloys of iron-nickel, cobalt-nickel and iron-cobalt-nickel and alloys of the said group with nonferromagnetic metals.
Claim 11
Dependent Claim
56 words
The low pass filter described in claim 6 in which said tape wound core is formed from a tape having a thickness in the range of approximately 0.00004 inch to 0.001 inch. 10 The low pass filter described in claim 7 in which said ferromagnetic material has a saturation induction in excess of about 16,000 Gauss.
References Cited (Backward Citations)
US2440652A
Cited
US2918633A
Cited
US2973490A
Cited
US3260972A
Cited
US3141145A
Cited
US3329911A
Cited
US3219951A
Cited
US3456215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |