Patent US4393732A successfully refreshed from Google Patents.
Patent US3713050A successfully refreshed from Google Patents.
US3713050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit transformers employing gyrators
Assignee: AT&T Inc
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Filing: 1971-05-11
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Granted: 1973-01-23
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Expires: 1991-05-11
Abstract
Abstract In an integrable circuit transformer employing cascade-connected gyrators, frequency response characteristics and the effective turns ratio are tailored and controlled by one or more two-port coupling networks that may be connected between the circuit input and the primary gyrator, between the two gyrators or between the secondary gyrator and the circuit output.
Inventors
- 👤 J Golembeski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:42
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
An effective transformer adaptable for fabrication in integrated circuit form comprising, in combination, a primary circuit including a pair of input points and a primary gyrator circuit, a secondary circuit including a pair of transformer output points and a secondary gyrator circuit, respective shunt networks connected between said input points and said primary gyrator circuit, between said gyrator circuits and between said secondary gyrator circuit and said output points, said networks and said gyrator circuits being connected in cascade circuit configuration, each of said networks comprising at least one circuit element having positive resistance and at least one circuit element having positive capacitance.
Claim 2
Dependent Claim
103 words
An effective transformer adaptable for fabrication in integrated circuit form comprising, in combination, a primary circuit including a pair of input points and a primary gyrator circuit, a secondary circuit including a pair of transformer output points and a secondary gyrator circuit, respective shunt networks connected between said input points and said primary gyrator circuit, between said gyrator circuits and between said secondary gyrator circuit and said output points, said networks and said gyrator circuits being connected in cascade circuit configuration, each of said networks comprising at least one circuit element having positive resistance and at least one circuit element having positive capacitance.
Claim 3
Dependent Claim
63 words
Apparatus in accordance with claim 1 wherein the forward and reverse gyration resistances of said primary gyrator circuit are equal, wherein the forward and reverse gyration resistances of said secondary gyrator circuit are equal and wherein the gyration resistances of said primary and secondary gyrator circuits are unequal, the effective turns ratio of said transformer being determined by said last named gyration resistances.
References Cited (Backward Citations)
US2775658A
Cited
US3517342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |