US3786299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eht supply particularly for television receivers
Assignee: US Philips Corp
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Filing: 1972-03-03
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Granted: 1974-01-15
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Expires: 1992-03-03
Abstract
Abstract A circuit for supplying the final anode voltage to a CRT from a horizontal output transformer has a voltage tripler circuit. A circuit comprising a diode coupled in series with the parallel combination of a resistor and capacitor is coupled across the transformer. This prevents ringing during the scanning time, and hence, improves the regulation of the output voltage.
Inventors
- 👤 K Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:56
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/062; H02M7/10; H02M7/103
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A circuit for supplying ultor electrode voltage to a display tube from a horizontal output transformer output winding comprising means having an input coupled to said output winding and an output coupled to said electrode for multiplying and rectifying the winding flyback pulses; and means coupled to said output winding for eliminating ringing pulses occuring at said output winding and having a polarity opposite to that of said flyback pulses, said eliminating means comprising a diode, a resistor, and a capacitor coupled in parallel with said resistor, said resistor and capacitor being coupled in series with said diode, whereby a junction is formed and the ultor voltage is substantially a constant regardless of the ultor current.
Claim 2
Dependent Claim
116 words
A circuit for supplying ultor electrode voltage to a display tube from a horizontal output transformer output winding comprising means having an input coupled to said output winding and an output coupled to said electrode for multiplying and rectifying the winding flyback pulses; and means coupled to said output winding for eliminating ringing pulses occuring at said output winding and having a polarity opposite to that of said flyback pulses, said eliminating means comprising a diode, a resistor, and a capacitor coupled in parallel with said resistor, said resistor and capacitor being coupled in series with said diode, whereby a junction is formed and the ultor voltage is substantially a constant regardless of the ultor current.
Claim 3
Dependent Claim
19 words
A circuit as claimed in claim 1 further comprising means for obtaining an anode supply voltage from said junction.
Claim 4
Dependent Claim
28 words
A circuit as claimed in claim 2 wherein said obtaining means comprises a second resistor coupled to said junction, and a second capacitor coupled to said second resistor.
Claim 5
Dependent Claim
55 words
A circuit as claimed in claim 1 wherein said multiplying and rectifying means comprises a plurality of diodes and capacitors arranged in a voltage multiplier configuration, one of said capacitors being coupled to said eliminating means capacitor, another one of said capacitors and one of said diodes being coupled in series and to said winding.
Claim 6
Dependent Claim
26 words
A circuit as claimed in claim 4 wherein the capacitance of said eliminating means capacitor is substantially larger than the capacitance of said capacitor coupled thereto.
Claim 7
Dependent Claim
25 words
A circuit as claimed in claim 4 further comprising a resistor coupled in series with said diode and capacitor that are coupled to said winding.
Claim 8
Dependent Claim
16 words
A circuit as claimed in claim 1 wherein said display tube comprises a color picture tube.
Claim 9
Dependent Claim
23 words
A circuit as claimed in claim 1 wherein said multiplying and rectifying means multiplies said winding voltage approximately by a factor of three.
Claim 10
Dependent Claim
85 words
A circuit for supplying ultor electrode voltage to a display tube from a horizontal output transformer output ultor tap comprising means having an input coupled to said output and an output coupled to said electrode for multiplying and rectifying the winding flyback pulses; and means coupled to said output ultor tap for eliminating ringing pulses occurring at said output ultor tap and having a polarity opposite to that of said flyback pulses; whereby the ultor voltage is substantially a constant regardless of the ultor current.
Claim 11
Dependent Claim
85 words
A circuit for supplying ultor electrode voltage to a display tube from a horizontal output transformer output ultor tap comprising means having an input coupled to said output and an output coupled to said electrode for multiplying and rectifying the winding flyback pulses; and means coupled to said output ultor tap for eliminating ringing pulses occurring at said output ultor tap and having a polarity opposite to that of said flyback pulses; whereby the ultor voltage is substantially a constant regardless of the ultor current.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |