US3751707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweep deflection linearization circuit
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1971-11-01
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Granted: 1973-08-07
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Expires: 1991-11-01
Abstract
Abstract A transistor is switched on and off by pulses, successively completing a circuit through an autotransformer, and completing a series deflection circuit through a tapping of the autotransformer, a capacitance and an inductance. The capacitance is divided in two series-connected capacitors. A resonent oscillator circuit employs the transformer tapping, the adjacent capacitor, and a variable resistor and choke connected between a junction of the capacitors and a junction of the transformer and the transistor.
Inventors
- 👤 H Greiner
- 👤 W Lerch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:44
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/237
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
Circuit apparatus for linearization of a deflection current of a transformer sweep circuit for television scanning in the line direction, comprising a source of sweep signals, a transformer connected to the signal source, a low-resistance switch connected to the transformer, a source of switching pulses connected to the switch for controlling the switch, a deflection circuit having a capacitance connected to a tap on the transformer, the capacitance being connected in series with a deflection coil, the capacitance having two capacitors (C1 and C2), and an oscillator circuit closed by a series circuit comprising a choke and a variable resistor, the series circuit being connected to a tap between both capacitors and to the transformer tapping.
Claim 2
Dependent Claim
116 words
Circuit apparatus for linearization of a deflection current of a transformer sweep circuit for television scanning in the line direction, comprising a source of sweep signals, a transformer connected to the signal source, a low-resistance switch connected to the transformer, a source of switching pulses connected to the switch for controlling the switch, a deflection circuit having a capacitance connected to a tap on the transformer, the capacitance being connected in series with a deflection coil, the capacitance having two capacitors (C1 and C2), and an oscillator circuit closed by a series circuit comprising a choke and a variable resistor, the series circuit being connected to a tap between both capacitors and to the transformer tapping.
Claim 3
Dependent Claim
27 words
A circuit according to claim 1, characterized in that the frequency of oscillation of said circuit is adjusted to approximately the third harmonic of the deflection frequency.
Claim 4
Dependent Claim
116 words
Line deflection circuit comprising an autotransformer in series with a controlled switching element and a voltage source, a branch having a capacitance, deflection coils connected to a tap of the autotransformer in series with the capacitance, and linearizing means comprising a resonant circuit coupled to the branch comprising the deflection coils, characterized in that said capacitance in series with the deflection coils comprises two capacitors, and an oscillator circuit having a resistor and an inductor connected in series between the end of an autotransformer-switch junction and a junction of said capacitors thereby forming a resonance circuit with the inductor, the resistor, a capacitor and a portion of the autotransformer between the tap and the autotransformer-switch junction.
Claim 5
Dependent Claim
116 words
Line deflection circuit comprising an autotransformer in series with a controlled switching element and a voltage source, a branch having a capacitance, deflection coils connected to a tap of the autotransformer in series with the capacitance, and linearizing means comprising a resonant circuit coupled to the branch comprising the deflection coils, characterized in that said capacitance in series with the deflection coils comprises two capacitors, and an oscillator circuit having a resistor and an inductor connected in series between the end of an autotransformer-switch junction and a junction of said capacitors thereby forming a resonance circuit with the inductor, the resistor, a capacitor and a portion of the autotransformer between the tap and the autotransformer-switch junction.
Claim 6
Dependent Claim
96 words
A line deflection sweep circuit comprising a controlled switch having first and second electrodes, an autotransformer connected to the first electrode in series with the switch, a tap connected to the autotransformer, first and second capacitors and a deflection coil respectively connected in series between the tap and the second electrode, and an inductor and variable resistor connected between the first electrode and a point between the first and second capacitors, thereby forming a resonant circuit with the inductor variable resistor, first capacitor and a portion of the autotransformer between the tap and the first electrode.
Claim 7
Dependent Claim
96 words
A line deflection sweep circuit comprising a controlled switch having first and second electrodes, an autotransformer connected to the first electrode in series with the switch, a tap connected to the autotransformer, first and second capacitors and a deflection coil respectively connected in series between the tap and the second electrode, and an inductor and variable resistor connected between the first electrode and a point between the first and second capacitors, thereby forming a resonant circuit with the inductor variable resistor, first capacitor and a portion of the autotransformer between the tap and the first electrode.
Claim 8
Dependent Claim
12 words
The apparatus of claim 4 wherein the resistor is a variable resistor.
Claim 9
Dependent Claim
24 words
The apparatus of claim 4 further comprising a source of control pulses connected to the switch for periodically completing a circuit between the electrodes.
Claim 10
Dependent Claim
20 words
The apparatus of claim 4 further comprising a third capacitor and a directional element connected in parallel to the electrodes.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |