US3914654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection amplifier
Assignee: CAE Link Corp
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Filing: 1973-04-06
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Granted: 1975-10-21
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Expires: 1993-04-06
Abstract
Abstract A high speed electromagnetic deflection amplifier having switching means for reducing the power requirement of the amplifier by connecting an energy storage capacitor in series with the deflection coil and the amplifier during retrace time.
Inventors
- 👤 John Andrew Cooksey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:51
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/69; H03K4/696
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
In combination with an electronic system wherein an amplifier with an input voltage having a variable but generally rising waveform causes a current having the same wave shape to flow through an inductor coil thereby generating a magnetic field to deflect the beam of a CRT, said system having a retrace capacitor to conserve the energy stored in the inductor and a non-reactive feedback path by which a sample of the output signal developed across a resistor is returned to the input circuitry comprising: switching means operable to connect said retrace capacitor in series with said amplifier and said inductor during retrace time, the current conduction path for the transfer and retransfer of energy between said inductor and capacitor thereby being through said amplifier; and further operable to disconnect said retrace capacitor such that the said amplifier output is connected directly to said inductor during trace time; and synchronizing means operable to control the time of start of said input voltage waveform and the operation of said switching means.
Claim 2
Dependent Claim
169 words
In combination with an electronic system wherein an amplifier with an input voltage having a variable but generally rising waveform causes a current having the same wave shape to flow through an inductor coil thereby generating a magnetic field to deflect the beam of a CRT, said system having a retrace capacitor to conserve the energy stored in the inductor and a non-reactive feedback path by which a sample of the output signal developed across a resistor is returned to the input circuitry comprising: switching means operable to connect said retrace capacitor in series with said amplifier and said inductor during retrace time, the current conduction path for the transfer and retransfer of energy between said inductor and capacitor thereby being through said amplifier; and further operable to disconnect said retrace capacitor such that the said amplifier output is connected directly to said inductor during trace time; and synchronizing means operable to control the time of start of said input voltage waveform and the operation of said switching means.
Claim 3
Dependent Claim
35 words
An electronic system accordinG to claim 1, said switching means comprising: a bipolar switch operable upon sync command; and a unipolar switch self operable according to the sense of the polarity of the load current.
Claim 4
Dependent Claim
14 words
A deflection amplifier according to claim 2 wherein said unipolar switch comprises a diode.
Claim 5
Dependent Claim
14 words
A deflection amplifier according to claim 2 wherein said bipolar switch comprises a transistor.
Claim 6
Dependent Claim
14 words
A deflection amplifier according to claim 1 wherein said storage means comprises a capacitor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |