Patent US3869677A successfully refreshed from Google Patents.
US3869677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave transistor carrier for common base class a operation
Assignee: RCA Corp
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Filing: 1973-10-18
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Granted: 1975-03-04
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Expires: 1993-10-18
Abstract
Abstract An electrically conductive substrate is adapted to be connected to the ground plane of a transmission line and an input and output are adapted to be electrically connected to the transmission line itself. A transistor having base, emitter and collector contacts is mounted on the substrate, the emitter contact being electrically connected to the input and the collector contact being electrically connected to the output. A capacitor is mounted directly on the substrate and is electrically connected between the transistor base contact and the substrate.
Inventors
- 👤 Erwin Franz Belohoubek
- 👤 Adolph Presser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:42
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/60; H10; H10W; H10W44/00; H10W44/20; H10W44/226; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/682; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07553; H10W72/07554; H10W72/50; H10W72/531; H10W72/536; H10W72/541; H10W72/5445; H10W72/5449; H10W72/547; H10W90/00; H10W90/701; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A transistor carrier adapted to be mounted in a microwave stripline circuit operable at a given frequency comprising: an electrically conductive substrate, an input means, an output means a capacitor mounted on said substrate and having one side electrically connected to said substrate, a transistor mounted on said substrate, said transistor including base, emitter and collector electrodes, the collector electrode being electrically connected to the output means, the emitter electrode being electrically connected to the input means and the base electrode being electrically connected to the other side of the said capacitor by a base lead having an inductance, said base lead and said capacitor being series resonant at said given frequency.
Claim 2
Dependent Claim
112 words
A transistor carrier adapted to be mounted in a microwave stripline circuit operable at a given frequency comprising: an electrically conductive substrate, an input means, an output means a capacitor mounted on said substrate and having one side electrically connected to said substrate, a transistor mounted on said substrate, said transistor including base, emitter and collector electrodes, the collector electrode being electrically connected to the output means, the emitter electrode being electrically connected to the input means and the base electrode being electrically connected to the other side of the said capacitor by a base lead having an inductance, said base lead and said capacitor being series resonant at said given frequency.
Claim 3
Dependent Claim
41 words
A transistor carrier in accordance with claim 1 in which the capacitor is a layer of a dielectric material having metal films on opposed surfaces of the dielectric layer, one metal film being mounted on and bonded to the said substrate.
Claim 4
Dependent Claim
46 words
A transistor carrier in accordance with claim 2 in which the input means comprises a transmission line segment mounted on the other metal film of said capacitor, such segment including a metal layer and a dielectric member spacing the metal layer from the said metal film.
Claim 5
Dependent Claim
46 words
A transistor carrier in accordance with claim 2 in which the input means comprises a transmission line segment mounted directly on the said substrate adjacent to the said capacitor, such segment including a metal layer and a dielectric member spacing the metal layer from the substrate.
Claim 6
Dependent Claim
60 words
A transistor carrier in accordance with claim 1 in which an inductance-capacitance compensating network is mounted on said substrate adjacent said transistor, said compensating network being electrically connected between the base electrode and the collector electrode of the transistor and forming a parallel resonance circuit which includes the base-to-collector internal capacitance of the transistor to compensate for such internal capacitance.
Claim 7
Dependent Claim
23 words
A transistor carrier in accordance with claim 5 in which the compensating network comprises a capacitor electrically in series with an inductance element.
Claim 8
Dependent Claim
28 words
A transistor carrier in accordance with claim 6 in which the compensating network capacitor is electrically connected between the collector electrode of the transistor and the output means.
Claim 9
Dependent Claim
48 words
A transistor carrier in accordance with claim 7 in which the transistor and compensating network capacitor are mounted on a transmission line segment which segment is itself mounted on the substrate, said segment including a metal layer and a dielectric member spacing the metal layer from the substrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |