US3956707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating measurement amplifier
Assignee: Individual
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Filing: 1975-01-16
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Granted: 1976-05-11
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Expires: 1995-01-16
Abstract
Abstract A floating measurement amplifier comprising an emitter and a receiver ferromagnetically coupled but totally separated from each other galvanically, the emitter comprising a modulator feeding the primary winding of a signal transformer and a feed device feeding the primary winding of a feed transformer, and the receiver comprising a demodulator, identical to the modulator controlling the feed of the secondary winding of the signal transformer and an oscillator connected to the secondary winding of the feed transformer, said modulator and demodulator being formed of transistors controlled by their bases, the modulator being connected to the primary winding of the signal transformer and, through a capacitor, to the primary winding of the feed transformer, and the demodulator being connected to the secondary winding of the signal transformer and, through a capacitor, to the secondary winding of said feed transformer.
Inventors
- 👤 Jean-Marie Bruyere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
246 words
A floating measuring amplifier comprising: an emitter comprising: a primary winding of a signal transformer; a modulator adapted to feed said primary winding; a first capacitor having first and second terminals, said first terminal being connected to said modulator; a primary winding of a feed transformer having first and second terminals; said first terminal of said feed transformer being connected to the second terminal of said first capacitor and said second terminal of said primary winding of said feed transformer being grounded; a power source connected at the connection point of said first terminal of said primary winding of said feed transformer and said second terminal of said first capacitor; a reciever stage comprising: a secondary winding of said signal transformer; a demodulator adapted to control the feed to said signal transformer secondary winding; a second capacitor having first and second terminals, said first terminal being connected to said demodulator; a secondary winding of said feed transformer, said secondary winding of said feed transformer having first and second terminals, said first terminal of said secondary winding of said feed transformer being connected to said second terminal of said second capacitor; said second terminal of said secondary winding of said feed transformer being grounded; an oscillator connected to said first terminal of said secondary winding of said feed transformer; and a shield completely separating said receiver from said emitter and isolating said receiver from said emitter galvanically while permitting said receiver and emitter to be coupled ferromagnetically.
Claim 2
Dependent Claim
246 words
A floating measuring amplifier comprising: an emitter comprising: a primary winding of a signal transformer; a modulator adapted to feed said primary winding; a first capacitor having first and second terminals, said first terminal being connected to said modulator; a primary winding of a feed transformer having first and second terminals; said first terminal of said feed transformer being connected to the second terminal of said first capacitor and said second terminal of said primary winding of said feed transformer being grounded; a power source connected at the connection point of said first terminal of said primary winding of said feed transformer and said second terminal of said first capacitor; a reciever stage comprising: a secondary winding of said signal transformer; a demodulator adapted to control the feed to said signal transformer secondary winding; a second capacitor having first and second terminals, said first terminal being connected to said demodulator; a secondary winding of said feed transformer, said secondary winding of said feed transformer having first and second terminals, said first terminal of said secondary winding of said feed transformer being connected to said second terminal of said second capacitor; said second terminal of said secondary winding of said feed transformer being grounded; an oscillator connected to said first terminal of said secondary winding of said feed transformer; and a shield completely separating said receiver from said emitter and isolating said receiver from said emitter galvanically while permitting said receiver and emitter to be coupled ferromagnetically.
Claim 3
Dependent Claim
188 words
The floating measurement amplifier of claim 1, wherein said modulator comprises first and second transistors of the same type having their emitters connected; their bases connected to respective first terminals of respective first and second resistors, the second terminals of said respective resistors being connected together to the first terminal of said first capacitor and to a third resistor connected to the ground of said emitter; the collector of said first transistor being connected to said primary winding of said signal transformer; the collector of said second transistor being connected to the ground of said emitter; and wherein said demodulator comprises third and fourth transistors of the same type having their emitters connected, their bases connected to respective first terminals of respective fourth and fifth resistors, the second respective terminals of said fourth and fifth resistors being connected together to the first terminal of said capacitor and to a sixth resistor connected to the ground of said receiver; the collector of said third transistor being connected to the secondary winding of said signal transformer; the collector of said fourth transistor being connected to the ground of said receiver.
References Cited (Backward Citations)
US3887877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |