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US5066926A
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Segmented cascode HBT for microwave-frequency power amplifiers
Assignee: Pacific Monolithics Inc
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Filing: 1990-06-26
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Granted: 1991-11-19
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Expires: 2010-06-26
Abstract
Abstract A cascode transistor configuration includes an input terminal for receiving the input signal, an output terminal for outputting the output signal and bass and emitter terminals connectable to ground. Each of a predetermined plurality of common-base heterojunction bipolar transistors (HBTs) has a base coupled to the base terminal, and a collector coupled to the support output terminal. Each of the predetermined plurality of common-emitter HBTs is associated with one of the common-base HBTs. Each common-emitter HBT also has a base coupled to the input terminal, an emitter coupled to the emitter terminal, and a collector coupled to only the emitter of the associated common-base HBT.
Inventors
- 👤 Ravi Ramachandran
- 👤 Allen F. Podell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:17
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/08; H03F1/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
142 words
A segmented cascode transistor for microwave-frequency power amplifiers for producing an amplified output signal from an input signal, comprising: an input terminal for receiving the input signal; an output terminal for outputting the output signal; a base terminal connectable to ground; an emitter terminal connectable to ground; a predetermined plurality of common-base heterojunction bipolar transistor means (HBTs), each common-base HBT having a base coupled to a base terminal, and a collector coupled to the output terminal; and the predetermined plurality of common-emitter HBTs, each common-emitter HBT being associated with one of the common-base HBTs, and having a base coupled to the input terminal, an emitter coupled to the emitter terminal, and a collector coupled to only the emitter of the associated common-base HBT; whereby current flowing in each common-base HBT is the same as the current flowing in each associated common-emitter HBT.
Claim 2
Dependent Claim
142 words
A segmented cascode transistor for microwave-frequency power amplifiers for producing an amplified output signal from an input signal, comprising: an input terminal for receiving the input signal; an output terminal for outputting the output signal; a base terminal connectable to ground; an emitter terminal connectable to ground; a predetermined plurality of common-base heterojunction bipolar transistor means (HBTs), each common-base HBT having a base coupled to a base terminal, and a collector coupled to the output terminal; and the predetermined plurality of common-emitter HBTs, each common-emitter HBT being associated with one of the common-base HBTs, and having a base coupled to the input terminal, an emitter coupled to the emitter terminal, and a collector coupled to only the emitter of the associated common-base HBT; whereby current flowing in each common-base HBT is the same as the current flowing in each associated common-emitter HBT.
Claim 3
Dependent Claim
122 words
A microwave-frequency power amplifier for producing an amplified output signal from an input signal, comprising: an input terminal for receiving the input signal; an output terminal for outputting the output signal; a predetermined plurality of common-base heterojunction bipolar transistor means (HBTs), each common-base HBT having a base coupled to ground and a collector coupled to the output terminal; and a predetermined plurality of common-emitter HBTs, each common-emitter HBT being associated with one of the common-base HBTs, and having a base coupled to the input terminal, an emitter coupled to ground, and a collector coupled to only the emitter of the associated common-base HBT; whereby current flowing in each common-base HBT is the same as the current flowing in each associated common-emitter HBT.
Claim 4
Dependent Claim
122 words
A microwave-frequency power amplifier for producing an amplified output signal from an input signal, comprising: an input terminal for receiving the input signal; an output terminal for outputting the output signal; a predetermined plurality of common-base heterojunction bipolar transistor means (HBTs), each common-base HBT having a base coupled to ground and a collector coupled to the output terminal; and a predetermined plurality of common-emitter HBTs, each common-emitter HBT being associated with one of the common-base HBTs, and having a base coupled to the input terminal, an emitter coupled to ground, and a collector coupled to only the emitter of the associated common-base HBT; whereby current flowing in each common-base HBT is the same as the current flowing in each associated common-emitter HBT.
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) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |