US3725676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic amplifier circuit
Assignee: Alcatel CIT SA
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Filing: 1971-07-27
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Granted: 1973-04-03
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Expires: 1991-07-27
Abstract
Abstract An electronic amplifier circuit including a control transistor connecting a load to a low voltage source in response to a control signal below a prescribed level and control means for switching a high voltage source to said control transistor to energizing said load when the control signal exceeds the prescribed level.
Inventors
- 👤 G Melchior
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:09
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0244; H03F3/00; H03F3/30; H03F3/34; H03F3/36; H03F3/42; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/69; H03K4/696; H03K6/00; H03K6/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
241 words
An electronic amplifier circuit for supplying to a load a voltage having, for brief periods of time, values higher than a threshold but lower than a maximum, and having outside of these periods of time values lower than this threshold, comprising a low voltage source capable of supplying a direct current at least equal to said threshold and a high voltage source in series with said low voltage source capable of supplying a direct current voltage at least equal to said maximum, a control transistor receiving on the base thereof a control signal and having first and second electrodes, said load being connected between said first electrode and one side of said low voltage source, a rectifier connecting said second electrode of said control transistor to the other side of said low voltage source with a polarity to conduct in the direction to energize said load through said control transistor, and control means for connecting said load to said high voltage source during said brief periods of time including a balance transistor having a collector electrode connected to one side of said high voltage source and an emItter electrode connected to said second electrode of said control transistor, and impedance means for providing a constant potential difference between said first electrode of said control transistor and the base of said balance transistor, the sign of said potential difference being such as to render said balance transistor conductive through said control transistor.
Claim 2
Dependent Claim
241 words
An electronic amplifier circuit for supplying to a load a voltage having, for brief periods of time, values higher than a threshold but lower than a maximum, and having outside of these periods of time values lower than this threshold, comprising a low voltage source capable of supplying a direct current at least equal to said threshold and a high voltage source in series with said low voltage source capable of supplying a direct current voltage at least equal to said maximum, a control transistor receiving on the base thereof a control signal and having first and second electrodes, said load being connected between said first electrode and one side of said low voltage source, a rectifier connecting said second electrode of said control transistor to the other side of said low voltage source with a polarity to conduct in the direction to energize said load through said control transistor, and control means for connecting said load to said high voltage source during said brief periods of time including a balance transistor having a collector electrode connected to one side of said high voltage source and an emItter electrode connected to said second electrode of said control transistor, and impedance means for providing a constant potential difference between said first electrode of said control transistor and the base of said balance transistor, the sign of said potential difference being such as to render said balance transistor conductive through said control transistor.
Claim 3
Dependent Claim
28 words
An electronic amplifier circuit as defined in claim 1 wherein said first electrode of said control transistor is the emitter and the second electrode thereof is the collector.
Claim 4
Dependent Claim
46 words
An electronic amplifier circuit as defined in claim 1 wherein said impedance means includes a Zener diode connected between said first electrode of said control transistor and the base of said balance transistor and a resistor connected between the base and collector of said balance transistor.
Claim 5
Dependent Claim
79 words
An electronic amplifier circuit as defined in claim 1 wherein said first electrode of said control transistor is the collector and said second electrode is the emitter, and further including an input transistor having its collector connected to the base of said control transistor and its emitter connected to the side of said load which is connected to said low voltage source, said input transistor being of the PNP type and said control transistor being of the NPN type.
Claim 6
Dependent Claim
20 words
An electronic amplifier circuit as defined in claim 1 wherein said control transistor and said balance transistor are PNP transistors.
Claim 7
Dependent Claim
223 words
An electronic amplifier circuit as defined in claim 1, and further comprising an additional low voltage source capable of supplying a direct current voltage at least equal to said threshold and an additional high voltage source capable of supplying a direct current voltage at least equal to said maximum, a second control transistor receiving on the base thereof a control signal and having first and second electrodes, said load being connected between said first electrode and one side of said additional low voltage source, a second rectifier connecting said second electrode of said second control transistor to the other side of said additional low voltage source with a polarity to conduct in the direction to energize said load through said second control transistor, and additional control means for connecting said load to said additional high voltage source during said brief periods time including a second balance transistor having a collector electrode connected to one side of said additional high voltage source and an emitter electrode connected to said second electrode of said second control transistor, and additional impedance means for providing a constant potential difference between said first electrode of said second control transistor and the base of said second balance transistor, the sign of said potential difference being such as to render said second balance transistor conductive through said second control transistor.
Claim 8
Dependent Claim
160 words
An electronic amplifier circuit according to claim 6 wherein said first electrode of said control transistor is the collector of this transistor, said second electrode being the emitter of said control transistor, the base of this transistor being connected to the collector of an input transistor whose emitter is connected to the side of said load connected to said low voltage source, said input and balance transistors being of the NPN type and said control transistor being of the PNP type, said first electrode of said control transistor being the collector of this transistor, said second electrode then being the emitter of said second control transistor, the base of said second control transistor being connected to the collector of a second input transistor whose emitter is connected to the side of said load connected to said low voltage source, said second input and second balance transistors being of the PNP type, said second control transistor being of the NPN type.
Claim 9
Dependent Claim
88 words
An electronic amplifier circuit as defined in claim 7 wherein said impedance meAns includes a Zener diode connected between said first electrode of said control transistor and the base of said balance transistor and a resistor connected between the base and collector of said balance transistor, and wherein said additional impedance means includes a Zener diode connected between said first electrode of said second control transistor and the base of said second balance transistor and a resistor connected between the base and collector of said second balance transistor.
Claim 10
Dependent Claim
69 words
An electronic circuit as defined in claim 5, wherein the base of said control transistor is connected to the collector of an intermediate transistor whose emitter is connected to said second electrode of said control transistor, the base of said intermediate transistor being connected to the collector of an input transistor whose emitter is connected to the side of said load which is connected to said low voltage source.
Claim 11
Dependent Claim
27 words
An electronic amplifier circuit as defined in claim 9 wherein said intermediate transistor is of the NPN type and said input transistor is of the PNP type.
Claim 12
Dependent Claim
137 words
An electronic amplifier circuit as defined in claim 6 wherein the base of said control transistor is connected to the collector of an intermediate transistor whose emitter is connected to said second electrode of said control transistor, the base of said intermediate transistor being connected to the collector of an input transistor whose emitter is connected to the side of said load which is connected to said low voltage source, and wherein the base of said second control transistor is connected to the emitter of a second intermediate transistor whose collector is connected to said first electrode of said second control transistor, the base of said intermediate transistor being connected to the collector of a second input transistor whose emitter is connected to the side of said load which is connected to said additional low voltage source.
References Cited (Backward Citations)
US3506850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |