US3747006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed amplifier for use with an inductive load
Assignee: REDIFFUSION SIMULATION Inc
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Filing: 1971-12-02
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Granted: 1973-07-17
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Expires: 1991-12-02
Abstract
Abstract Amplifier apparatus which employs a center tapped energy storage inductor for rapidly varying the magnitude and direction of current through an inductive load. The load is connected between a source of reference potential and the center tap on the inductor of which opposite ends are connected through current limiting means to power supply terminals at voltages respectively higher and lower than the reference potential. Currents through opposite ends of the energy storage inductor are differentially limited, whereby reducing the current through one portion of the inductor causes a rapid load current change as a result of counter EMF generated by the other portion of the inductor.
Inventors
- 👤 J Freeborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; H03K; H03K17/00; H03K17/04; H03K17/041; H03K17/04113
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
322 words
Amplifier apparatus capable of rapidly varying the magnitude and direction of current through an inductive load comprising: power supply means for supplying current to circuitry connected thereto, said power supply means including first, second and third terminals respectively at the reference potential, a voltage higher than the reference potential and a voltage lower than the reference potential; inductive load means; an energy storage inductor including a first portion connected between a first end of said inductor and a center tap thereof, and a second portion connected between a second end of said inductor and the center tap; first and second controllable current limiting means; first connecting means for connecting said inductive load means between the first terminal of said power supply means and the center tap of said energy storage inductor; second connecting means for connecting said first controllable current limiting means between the second terminal of said power supply means and the first end of said energy storage inductor; third connecting means for connecting said second controllable limiting means between the third terminal of said power supply means and the second end of said energy storage inductor; differential control means for producing differential control signals; and means for connecting said differential control means to said first and said second controllable current limiting means so that signals from said control means differentially limit the maximum currents through separate portions of said energy storage inductor whereby rapidly decreasing the current through the first portion of said energy storage inductor results in production of a large voltage of one polarity across said inductive load means due to back EMF generated by the second portion of said energy storage inductor, and whereby rapidly decreasing the current through the second portion of said energy storage inductor results in production of a large voltage of the opposite polarity across said inductive load means due to back EMF generated by the first portion of said energy storage inductor.
Claim 2
Dependent Claim
322 words
Amplifier apparatus capable of rapidly varying the magnitude and direction of current through an inductive load comprising: power supply means for supplying current to circuitry connected thereto, said power supply means including first, second and third terminals respectively at the reference potential, a voltage higher than the reference potential and a voltage lower than the reference potential; inductive load means; an energy storage inductor including a first portion connected between a first end of said inductor and a center tap thereof, and a second portion connected between a second end of said inductor and the center tap; first and second controllable current limiting means; first connecting means for connecting said inductive load means between the first terminal of said power supply means and the center tap of said energy storage inductor; second connecting means for connecting said first controllable current limiting means between the second terminal of said power supply means and the first end of said energy storage inductor; third connecting means for connecting said second controllable limiting means between the third terminal of said power supply means and the second end of said energy storage inductor; differential control means for producing differential control signals; and means for connecting said differential control means to said first and said second controllable current limiting means so that signals from said control means differentially limit the maximum currents through separate portions of said energy storage inductor whereby rapidly decreasing the current through the first portion of said energy storage inductor results in production of a large voltage of one polarity across said inductive load means due to back EMF generated by the second portion of said energy storage inductor, and whereby rapidly decreasing the current through the second portion of said energy storage inductor results in production of a large voltage of the opposite polarity across said inductive load means due to back EMF generated by the first portion of said energy storage inductor.
Claim 3
Dependent Claim
40 words
The apparatus of claim 1 wherein the first and second portions of said energy storage inductor are inductively coupled and currents flowing through the first and second portions of said energy storage inductor produce magnetic fluxes of the same polarity.
Claim 4
Dependent Claim
19 words
The apparatus of claim 2 wherein said inductive load means comprises a deflection coil for a cathode ray tube.
Claim 5
Dependent Claim
53 words
The apparatus of claim 1 wherein: said first and second controllable current limiting means each includes an amplifier having a control input; and said differential control means comprises a differential amplifier having first and second signal outputs connected to the control inputs of the amplifiers in said first and second current limiting means.
Claim 6
Dependent Claim
34 words
The apparatus of claim 4 further including feedback signal means for supplying a feedback signal indicative of the magnitude and direction of current flow through said inductive load means to said differential control means.
Claim 7
Dependent Claim
40 words
The apparatus of claim 5 wherein said feedback signal means comprises a first resistive element which forms a portion of said first connecting means and a second resistive element connected between the first resistive element and said differential control means.
Claim 8
Dependent Claim
179 words
In amplifier apparatus for rapidly varying the magnitude and direction of current through an inductive element, including power supply means for supplying current to circuitry connected between a first terminal at a reference potential and second and third terminals at voltages respectively higher and lower than the reference potential, and Including a first controllable current limiting device connected to limit current flow through the second terminal, a second controllable current limiting device connected to limit current flow through the third terminal and differential control means for producing control signals for differentially controlling said current limiting devices, the improvement which comprises: a center tapped energy storage inductor including first and second portions on opposite sides of the center tap; first connecting means for respectively connecting one end of each of the first and second portions of said energy storage inductor to a different one of said first and second controllabe current limiting devices; and second connecting means for connecting said inductive element between the center tap of said energy storage inductor and the first terminal of said power supply means.
Claim 9
Dependent Claim
179 words
In amplifier apparatus for rapidly varying the magnitude and direction of current through an inductive element, including power supply means for supplying current to circuitry connected between a first terminal at a reference potential and second and third terminals at voltages respectively higher and lower than the reference potential, and Including a first controllable current limiting device connected to limit current flow through the second terminal, a second controllable current limiting device connected to limit current flow through the third terminal and differential control means for producing control signals for differentially controlling said current limiting devices, the improvement which comprises: a center tapped energy storage inductor including first and second portions on opposite sides of the center tap; first connecting means for respectively connecting one end of each of the first and second portions of said energy storage inductor to a different one of said first and second controllabe current limiting devices; and second connecting means for connecting said inductive element between the center tap of said energy storage inductor and the first terminal of said power supply means.
Claim 10
Dependent Claim
42 words
The apparatus of claim 7 wherein the first and second portions of said energy storage inductor are inductively coupled and currents flowing through the first and second portions of said energy storage inductor produce like directed magnetic fluxes along common flux paths.
Claim 11
Dependent Claim
18 words
The apparatus of claim 8 wherein said inductive element comprises a deflection coil for a cathode ray tube.
Claim 12
Dependent Claim
42 words
The apparatus of claim 9 further including feedback signal means for producing a feedback signal indicative of the magnitude and direction of current flow through said inductive element; and third connecting means for supplying the feedback signal to said differential control means.
Claim 13
Dependent Claim
40 words
The apparatus of claim 10 wherein said feedback signal means comprises a first resistive element which forms a portion of said second connecting means and a second resistive element connected between the first resistive element and said differential control means.
References Cited (Backward Citations)
US2786903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |