US3824338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver power supply
Assignee: Aerojet Rocketdyne Holdings Inc
•
Filing: 1973-06-06
•
Granted: 1974-07-16
•
Expires: 1993-06-06
Abstract
Abstract A television receiver of transformerless type having primary and secondary voltage supply circuits which respectively supply ungrounded and grounded supply voltages to horizontal and vertical deflection circuits on the one hand and other remaining circuit components on the other hand. D.c. isolation is provided between the grounded and ungrounded components by an isolating transformer connected between sync signal amplifier means and the deflection circuits, the transformer however permitting a.c. signal transmission between the sync signal amplifier means and the deflection circuits.
Inventors
- 👤 T Suzuki
- 👤 N Imao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:41
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/63
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
211 words
A television receiver comprising grounded tuner, amplifier and detector circuit means for respectively supplying predetermined signal voltages to grounded audio, video, amplifier and sync signal amplifier stages, electrically ungrounded horizontal and vertical deflection circuit means operatively connected to the output of said grounded sync signal amplifier stage for respectively providing as a function of said sync signal a horizontal and a vertical sweep signal each of predetermined frequency, a source of line voltage, an ungrounded transformerless power source connected to said line voltage for supplying ungrounded B power to both said electrically ungrounded horizontal and vertical deflection circuit means, a second grounded power source having a primary winding connected to said line voltage and ground connected secondary windings electrically isolating said second grounded power source from said ungrounded power source, said grounded power source providing at its secondary winding a plurality of grounded B voltage supplies for supplying grounded voltages to said grounded tuner, amplifier and detector circuit means and to said grounded stages, and signal transferring, insulating transformer means operatively connected between said grounded sync signal amplifier and said electrically ungrounded horizontal and vertical deflection circuit means for both transferring the output Of said sync signal amplifier to said oscillator deflection circuit means and for blocking d.c. current flow therebetween.
Claim 2
Dependent Claim
211 words
A television receiver comprising grounded tuner, amplifier and detector circuit means for respectively supplying predetermined signal voltages to grounded audio, video, amplifier and sync signal amplifier stages, electrically ungrounded horizontal and vertical deflection circuit means operatively connected to the output of said grounded sync signal amplifier stage for respectively providing as a function of said sync signal a horizontal and a vertical sweep signal each of predetermined frequency, a source of line voltage, an ungrounded transformerless power source connected to said line voltage for supplying ungrounded B power to both said electrically ungrounded horizontal and vertical deflection circuit means, a second grounded power source having a primary winding connected to said line voltage and ground connected secondary windings electrically isolating said second grounded power source from said ungrounded power source, said grounded power source providing at its secondary winding a plurality of grounded B voltage supplies for supplying grounded voltages to said grounded tuner, amplifier and detector circuit means and to said grounded stages, and signal transferring, insulating transformer means operatively connected between said grounded sync signal amplifier and said electrically ungrounded horizontal and vertical deflection circuit means for both transferring the output Of said sync signal amplifier to said oscillator deflection circuit means and for blocking d.c. current flow therebetween.
Claim 3
Dependent Claim
54 words
A television receiver according to claim 1, wherein separate insulating transformer means are provided for separately connecting said horizontal and vertical deflection circuit means to associated horizontal and vertical sync signal amplifiers supplied with the output of a sync signal separator whose input is connected to the output of said sync signal amplifier stage.
Claim 4
Dependent Claim
34 words
A television receiver according to claim 1, wherein said insulating transformer means comprises a step-up transformer having a turns ratio of 1 to 1 between the primary and secondary windings of said transformer means.
References Cited (Backward Citations)
US2987649A
Cited
US3461232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |