US4024434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement in a television receiver provided with a line deflection circuit and a switched supply voltage circuit
Assignee: US Philips Corp
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Filing: 1975-04-11
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Granted: 1977-05-17
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Expires: 1995-04-11
Abstract
Abstract A supply voltage arrangement in a television receiver, which arrangement is switched at line frequency. The diode of the arrangement is shunted by the series combination of a capacitor and a primary winding of a transformer, a secondary of which controls the switch in the line deflection circuit.
Inventors
- 👤 Louis Gerardus Josephus Joosten
- 👤 Wim Bosboom
- 👤 Wilhelmus Theodorus Hendrikus Hetterscheid
- 👤 Gerrit Pieter Johannes Van Schaik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:45
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
142 words
Circuit arrangement for a television receiver provided with a line deflection circuit means for generating a line-frequency deflection current with a trace and a retrace through a deflection coil, which circuit means includes a first switch controllable at the line frequency, and with a supply voltage circuit which is switched also at the line frequency and includes a second switch controllable at the line frequency, a diode and an inductance, across which inductance a retrace pulse is produced originating from the line deflection circuit, means for applying to the first switch a control signal originating from the supply voltage circuit, wherein the improvement comprises a series combination of a capacitor and a primary winding of a transformer connected in parallel with the diode, an end of a secondary winding of the transformer being connected to a control electrode of the first switch.
Claim 2
Dependent Claim
142 words
Circuit arrangement for a television receiver provided with a line deflection circuit means for generating a line-frequency deflection current with a trace and a retrace through a deflection coil, which circuit means includes a first switch controllable at the line frequency, and with a supply voltage circuit which is switched also at the line frequency and includes a second switch controllable at the line frequency, a diode and an inductance, across which inductance a retrace pulse is produced originating from the line deflection circuit, means for applying to the first switch a control signal originating from the supply voltage circuit, wherein the improvement comprises a series combination of a capacitor and a primary winding of a transformer connected in parallel with the diode, an end of a secondary winding of the transformer being connected to a control electrode of the first switch.
Claim 3
Dependent Claim
22 words
Circuit arrangement as claimed in claim 1, wherein the first switch conducts during the time interval in which the diode is non-conductive.
Claim 4
Dependent Claim
45 words
Circuit arrangement as claimed in claim 1, in which the second switch and the inductance are connected in series, and wherein the parallel connection of the diode and the said series combination of the a capacitor and the inductance is connected to the primary winding.
References Cited (Backward Citations)
US3912971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |