US3555309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuits
Assignee: RCA Licensing Corp
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Filing: 1967-11-03
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Granted: 1971-01-12
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Expires: 1987-11-03
Abstract
Abstract An electrical circuit especially suited for fabrication using integrated circuit techniques including a common emitter transistor amplifier connected in cascade relation with a common collector transistor amplifier and interconnected with a pair of resistors of predetermined resistance ratio in a degenerative feedback loop so that the common emitter stage additionally provides a stabilized direct current voltage reference for the common collector stage.
Inventors
- 👤 Allen Leroy Limberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:51
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/562; H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F3/347
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
254 words
An electrical circuit comprising: first and second transistors, each having an emitter electrode, a base electrode, and a collector electrode; circuit means coupled to the emitter, base, and collector electrodes of said first transistor for connecting said first transistor in a common emitter configuration, with the emitter electrode of said first transistor being directly connected to a point of reference potential; circuit means coupled to the emitter, base, and collector electrodes of said second transistor for connecting said second transistor in a common collector configuration, said lastmentioned circuit means including a pair of impedance elements of predetermined ratio N serially direct current coupled between the emitter electrode of said second transistor and said point of reference potential; means for direct current coupling the collector electrode of said first transistor to the base electrode of said second transistor; means direct current coupling the junction between said serially coupled impedance elements to the base electrode of said first transistor to provide a degenerative feedback circuit including at least said first transistor, the base and emitter of said second transistor and said impedance elements for producing first and second direct voltages at the emitter and base electrodes, respectively, of said second transistor which, with respect to said reference potential, are substantially equal respectively to (N + 1) times and (N + 2) times the base electrode to emitter electrode voltage drop of said first transistor; and utilization means coupled between one of the emitter and base electrodes of said second transistor and said point of reference potential.
Claim 2
Dependent Claim
254 words
An electrical circuit comprising: first and second transistors, each having an emitter electrode, a base electrode, and a collector electrode; circuit means coupled to the emitter, base, and collector electrodes of said first transistor for connecting said first transistor in a common emitter configuration, with the emitter electrode of said first transistor being directly connected to a point of reference potential; circuit means coupled to the emitter, base, and collector electrodes of said second transistor for connecting said second transistor in a common collector configuration, said lastmentioned circuit means including a pair of impedance elements of predetermined ratio N serially direct current coupled between the emitter electrode of said second transistor and said point of reference potential; means for direct current coupling the collector electrode of said first transistor to the base electrode of said second transistor; means direct current coupling the junction between said serially coupled impedance elements to the base electrode of said first transistor to provide a degenerative feedback circuit including at least said first transistor, the base and emitter of said second transistor and said impedance elements for producing first and second direct voltages at the emitter and base electrodes, respectively, of said second transistor which, with respect to said reference potential, are substantially equal respectively to (N + 1) times and (N + 2) times the base electrode to emitter electrode voltage drop of said first transistor; and utilization means coupled between one of the emitter and base electrodes of said second transistor and said point of reference potential.
Claim 3
Dependent Claim
50 words
An electrical circuit as defined in claim 1 wherein N is defined as the ratio between the value of the one of said impedance elements nearer the emitter electrode of said second transistor to the value of the one of said impedance elements nearer to said point of reference potential.
Claim 4
Dependent Claim
62 words
An electrical circuit as defined in claim 1 wherein said impedance elements comprise a pair of serially connected resistors and wherein said predetermined ratio N comprises the ratio between the resistance value of the one of said resistors nearer the emitter electrode of said second transistor to the resistance value of the one of said resistors nearer said point of reference potential.
Claim 5
Dependent Claim
60 words
An electrical circuit as defined in claim 3 wherein said first and second transistors, said common emitter connecting means, said common collector connecting means including said pair of resistors, said coupling means to the base electrode of said first transistor, and said coupling means to the base electrode of said second transistor are all disposed on a single integrated circuit.
Claim 6
Dependent Claim
245 words
An electrical circuit comprising: first and second transistors, each having an emitter electrode, a base electrode, and a collector electrode; first the second terminals adapted to be connected to a source of energizing potential; first means coupling the collector electrode of said first transistor to said first terminal; a direct current connection from the emitter electrode of said first transistor of said second terminal; a direct current connection from the collector electrode of said second transistor to said first terminal; second means including first and second series connected resistors direct current coupling the emitter electrode of said second transistor to said second terminal, with said first resistor being nearer to said emitter electrode and with said second resistor being nearer to said second terminal, the ratio of resistances of said first and second resistors being substantially equal to N; third means direct current coupling the collector electrode of said first transistor to the base electrode of said second transistor; and fourth means direct current coupling the junction between said first and second resistors to the base electrode of said first transistor to provide a degenerative feedback circuit including at least said first transistor, the base and emitter of said second transistor and said series-connected resistors for producing a direct voltage between the emitter electrode of said second transistor and said second terminal which is of a value substantially equal to (N + 1) times the forward base emitter conductive voltage drop of said first transistor.
Claim 7
Dependent Claim
245 words
An electrical circuit comprising: first and second transistors, each having an emitter electrode, a base electrode, and a collector electrode; first the second terminals adapted to be connected to a source of energizing potential; first means coupling the collector electrode of said first transistor to said first terminal; a direct current connection from the emitter electrode of said first transistor of said second terminal; a direct current connection from the collector electrode of said second transistor to said first terminal; second means including first and second series connected resistors direct current coupling the emitter electrode of said second transistor to said second terminal, with said first resistor being nearer to said emitter electrode and with said second resistor being nearer to said second terminal, the ratio of resistances of said first and second resistors being substantially equal to N; third means direct current coupling the collector electrode of said first transistor to the base electrode of said second transistor; and fourth means direct current coupling the junction between said first and second resistors to the base electrode of said first transistor to provide a degenerative feedback circuit including at least said first transistor, the base and emitter of said second transistor and said series-connected resistors for producing a direct voltage between the emitter electrode of said second transistor and said second terminal which is of a value substantially equal to (N + 1) times the forward base emitter conductive voltage drop of said first transistor.
Claim 8
Dependent Claim
65 words
An electrical circuit as defined in claim 5 wherein said first means comprises a third resistor and said third and fourth means each comprise direct current connections for establishing direct voltages between the emitter and base electrodes of said second transistor and said second terminal at values substantially equal to (N+1) and (N+2=) times the base electrode-to-emitter electrode voltage drop of said first transistor, respectively.
Claim 9
Dependent Claim
149 words
An electrical circuit as defined in claim 5 wherein said first means comprises a third resistor serially connected to said first terminal through the current path existing between the collector and emitter electrodes of an additionally included third transistor, the collector electrode of which is direct current connected to said first terminal and the base electrode of which is adapted to receive applied input signals referenced to a first direct voltage, wherein said third and fourth means comprise a direct current connection and a further fourth resistor, respectively, and wherein there is additionally included a signal bypass capacitor connected between an end of said fourth resistor and said second terminal to provide corresponding output signals at the emitter electrode of said second transistor which are referenced to a second direct voltage of a value substantially equal to (N+1) times the base electrode-to-emitter electrode voltage drop of said first transistor.
Claim 10
Dependent Claim
121 words
An electrical circuit as defined in claim 5 wherein said first means comprises a third resistor and said third and fourth means each comprise direct current connections, and wherein there is additionally included a source of input signals and a coupling capacitor serially connected in the order named between said second terminal and the base electrode of said first transistor, with the impedance exhibited by said additional series connection at signal frequencies being substantially less than the resistance value of the parallel combination of said first and second resistors, for providing amplified signals at the emitter electrode of said second transistor referenced to a direct voltage substantially equal to (N+1) times the base electrode-to-emitter electrode voltage drop of said first transistor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |