US3697882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier circuit
Assignee: US Philips Corp
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Filing: 1970-10-06
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Granted: 1972-10-10
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Expires: 1990-10-06
Abstract
Abstract An amplifier for converting a push-pull signal into a singleended signal, using a transistor configuration having two input terminals, so that a loss-free conversion is obtained and at the same time both large common-mode signals and large output signals are permissible.
Inventors
- 👤 Rudy Johan Van Den Plassche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:30
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F3/347; H03F3/30; H03F3/3066; H03F3/3067; H03F3/45; H03F3/45071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
An amplifier for converting a push-pull signal into a single ended signal, comprising first and second transistors each having an emitter, a base and a collector, means for supplying input push-pull signal currents to the base and emitter respectively of a first of said transistors, a diode connected in the emitter path of said first transistor and connected in shunt with the emitter and base of said second transistor, means connecting the collector of said second transistor to the base of said first transistor, and means for deriving an output signal from the collector of said first transistor.
Claim 2
Dependent Claim
98 words
An amplifier for converting a push-pull signal into a single ended signal, comprising first and second transistors each having an emitter, a base and a collector, means for supplying input push-pull signal currents to the base and emitter respectively of a first of said transistors, a diode connected in the emitter path of said first transistor and connected in shunt with the emitter and base of said second transistor, means connecting the collector of said second transistor to the base of said first transistor, and means for deriving an output signal from the collector of said first transistor.
Claim 3
Dependent Claim
107 words
An amplifier as claimed in claim 1, further comprising a third and a fourth transistor, means connecting the collector and the base of the first transistor to the collector and the base respectively of the third transistor, a second diode connected in the emitter path of said third transistor and connected in the shunt with the base and emitter of said fourth transistor, means connecting the collector of said fourth transistor to the base of the third transistor, the third and fourth transistors and the associated diode being of a conductivity type opposite to that of the first and second transistors and of the diode associated therewith.
Claim 4
Dependent Claim
25 words
An amplifier as claimed in claim 2, further comprising a resistor interconnecting the base of the first transistor to the base of the third transistor.
Claim 5
Dependent Claim
16 words
An amplifier as claimed in claim 3, further comprising a capacitor in shunt with said resistor.
Claim 6
Dependent Claim
19 words
An amplifier as claimed in claim 3, wherein said resistor comprises the emitter collector path of a fifth transistor.
References Cited (Backward Citations)
US3469202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |