US3735236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tv horizontal oscillator having a stabilized auxiliary dc output
Assignee: Loewe Opta GmbH
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Filing: 1972-01-14
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Granted: 1973-05-22
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Expires: 1992-01-14
Abstract
Abstract A TV horizontal oscillator having an output transformer is arranged to supply a principal AC output to the horizontal deflection yoke of a picture tube. In order to provide stabilized DC voltage to other transistor stages in the TV receiver, an auxiliary winding of the transformer is connected in series with the parallel combination of a resistance and a capacitance. A voltage proportional to the difference between the voltage across at least a portion of the auxiliary winding and that across the resistance-capacitance combination is rectified and filtered. The resulting DC output is substantially insulated from changes in current through the output transformer caused, e.g., by beamcurrent induced changes in the width of the TV picture.
Inventors
- 👤 H Richter
- 👤 W Thiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:40
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
In a TV horizontal oscillator, an arrangement for generating a reference DC voltage that is stabilized against current changes through the transconductive path of the oscillator, which comprises: a transformer having at least a first primary winding serially connected in the transconductive path of the oscillator, and an auxiliary winding coupled to the transconductive path and responsive to such current changes for generating a first voltage that varies in proportion to such current changes; a first resistance connected in series with the auxiliary winding and responsive to such current changes for generating a second voltage that varies in proportion to such current changes, whereby each incremental change in the second voltage is opposite to the corresponding incremental change in the first voltage; a first capacitance connected in parallel with the first resistance; and means combining the voltages across the auxiliary winding and across the first resistance for deriving a DC voltage proportional to the algebraic sum of the combined voltages such DC voltages constituting the reference DC voltage.
Claim 2
Dependent Claim
168 words
In a TV horizontal oscillator, an arrangement for generating a reference DC voltage that is stabilized against current changes through the transconductive path of the oscillator, which comprises: a transformer having at least a first primary winding serially connected in the transconductive path of the oscillator, and an auxiliary winding coupled to the transconductive path and responsive to such current changes for generating a first voltage that varies in proportion to such current changes; a first resistance connected in series with the auxiliary winding and responsive to such current changes for generating a second voltage that varies in proportion to such current changes, whereby each incremental change in the second voltage is opposite to the corresponding incremental change in the first voltage; a first capacitance connected in parallel with the first resistance; and means combining the voltages across the auxiliary winding and across the first resistance for deriving a DC voltage proportional to the algebraic sum of the combined voltages such DC voltages constituting the reference DC voltage.
Claim 3
Dependent Claim
83 words
An arrangement as defined in claim 1, in which the auxiliary winding is a tapped second primary winding of the transformer serially connected in the transconductive path, and in which the deriving means comprises, in combination, a rectifier and a second resistance serially connected between the tap of the second primary winding and the terminal of the first resistance most remote from the second primary winding, the voltage at the junction of the rectifier and the second capacitance constituting the reference DC voltage.
Claim 4
Dependent Claim
88 words
An arrangement as defined in claim 1, in which the auxiliary winding is a secondary winding of the transformer, in which the junction between the secondary winding and the first resistance is connected to a point in the transconductive path of the oscillator, and in which the deriving means comprises, in combination, a rectifier and a second capacitance connected across the serial combination of the secondary winding and the first resistance, the voltage at the junction of the rectifier and the second capacitance constituting the reference DC voltage.
Claim 5
Dependent Claim
107 words
In a TV horizontal oscillator, an arrangement for generating a reference DC voltage that is stabilized against current changes through the transconductive path of the oscillator, which comprises: a transformer having first and second primary windings serially connected in the transconductive path of the oscillator, and a secondary winding; a resistance connected in series with the second primary winding; a capacitance connected in parallel with the resistance; means for rectifying and filtering the output of the secondary winding; and means for adding the voltage across the resistance to the output of the rectifying and filtering means, the output of the adding means constituting the reference DC voltage.
Claim 6
Dependent Claim
107 words
In a TV horizontal oscillator, an arrangement for generating a reference DC voltage that is stabilized against current changes through the transconductive path of the oscillator, which comprises: a transformer having first and second primary windings serially connected in the transconductive path of the oscillator, and a secondary winding; a resistance connected in series with the second primary winding; a capacitance connected in parallel with the resistance; means for rectifying and filtering the output of the secondary winding; and means for adding the voltage across the resistance to the output of the rectifying and filtering means, the output of the adding means constituting the reference DC voltage.
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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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |