Patent US3752903A successfully refreshed from Google Patents.
US3752903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot voltage supply & voltage regulation means
Assignee: RCA Licensing Corp
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Filing: 1971-11-08
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Granted: 1973-08-14
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Expires: 1991-11-08
Abstract
Abstract Means for energizing an oscillator, and for regulating a voltage derived from the oscillator output. A pilot voltage is developed across a zener diode and applied to an oscillator, and to the base of a regulating transistor by means of a reverse-poled diode. Unregulated voltages are applied to the cathode of the zener diode and to the base of the regulating transistor. The pilot voltage arising across the zener diode energizes the oscillator which drives circuitry for producing scansion signals to deflect an electron beam within a cathode ray tube. The scansion signals are also applied to the collector of the regulating transistor after being rectified and smoothed. The regulating transistor is controlled by a base voltage derived across the zener diode and uses the rectified scansion signal voltage to produce a relatively low-impedance, regulated DC voltage at the emitter terminal thereof.
Inventors
- 👤 R Newman
- 👤 M Pluck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:40
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/18; H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
In a television receiver including oscillator means and deflection drive means for producing scan voltages to effect scansion of an electron beam across the face of a cathode ray tube, means for applying a regulated operating voltage to the oscillator means and for providing a regulated DC voltage derived from said scan voltages, comprising: fixed voltage developing means, regulator amplifying means having first, second and control terminals, coupling means coupling the fixed voltage developed by said fixed voltage developing means to said oscillator means and to said control terminal, means for supplying an unregulated voltage to said deflection drive means, means for supplying an unregulated voltage to said control terminal, said coupling means holding the voltage at said control terminal substantially at said fixed voltage and limiting the current available to said control terminal, means to derive a DC voltage proportional to said scan voltages and to apply said DC voltage to said first terminal, whereby a regulated voltage controlled by said fixed voltage is provided at said second terminal.
Claim 2
Dependent Claim
170 words
In a television receiver including oscillator means and deflection drive means for producing scan voltages to effect scansion of an electron beam across the face of a cathode ray tube, means for applying a regulated operating voltage to the oscillator means and for providing a regulated DC voltage derived from said scan voltages, comprising: fixed voltage developing means, regulator amplifying means having first, second and control terminals, coupling means coupling the fixed voltage developed by said fixed voltage developing means to said oscillator means and to said control terminal, means for supplying an unregulated voltage to said deflection drive means, means for supplying an unregulated voltage to said control terminal, said coupling means holding the voltage at said control terminal substantially at said fixed voltage and limiting the current available to said control terminal, means to derive a DC voltage proportional to said scan voltages and to apply said DC voltage to said first terminal, whereby a regulated voltage controlled by said fixed voltage is provided at said second terminal.
Claim 3
Dependent Claim
46 words
The invention defined in claim 1, wherein said coupling means includes a diode connected to said fixed voltage developing means, said diode permitting said control terminal to be energized by said unregulated voltage and holding the voltage at said control terminal substantially at said fixed voltage.
Claim 4
Dependent Claim
85 words
The invention defined in claim 2, wherein said regulator amplifying means is a transistor, the control terminal thereof being the base electrode of said transistor, and said fixed voltage developing means is a zener diode, said diode being connected between said zener diode and the base electrode of said transistor to permit said transistor to be energized by the unregulated voltage applied to this control terminal and holding the voltage level at the base electrode substantially at the fixed voltage established by said zener diode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |