US3678332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for adjusting the linearity of the deflection signal generated for a deflection system
Assignee: US Philips Corp
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Filing: 1970-03-10
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Granted: 1972-07-18
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Expires: 1990-03-10
Abstract
Abstract A circuit arrangement for adjusting the linearity of the deflection signal generated for a deflection system, particularly for a field deflection signal in a television receiver. Two RCnetworks which are connected through a third RC-network during the sweep are arranged after the field oscillator between supply voltage and earth. The variation of the resistor in this third RC-network renders it possible to vary the curvature of the voltage waveform at the output. During the flyback the two charge capacitors are discharged by means of a diode which is connected parallel to the third network. The frequency amplitude and linearity adjusting members are separated from one another.
Inventors
- 👤 Antonius Boekhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:15
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/50; H03K4/501; H03K4/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A circuit arrangement for adjusting the linearity of the deflection signal generated for a deflection system and having a sweep and a flyback period, wherein two networks each comprising the series arrangement of a resistor and a capacitor are arranged between the two terminals of a voltage supply source and which are separated from each other by a diode which is blocked during the sweep period, and comprising means for causing said diode to conduct during the flyback period, the capacitors of said networks being discharged through said diode and said means, characterized in that a network comprising the series arrangement of a capacitor, a fixed resistor and a variable resistor is arranged parallel to said diode, so that due to the adjustment of said resistor the output voltage of the circuit arrangement is a voltage increasing with time, whose differential coefficient with respect to time may either increase or decrease, or remain constant.
Claim 2
Dependent Claim
154 words
A circuit arrangement for adjusting the linearity of the deflection signal generated for a deflection system and having a sweep and a flyback period, wherein two networks each comprising the series arrangement of a resistor and a capacitor are arranged between the two terminals of a voltage supply source and which are separated from each other by a diode which is blocked during the sweep period, and comprising means for causing said diode to conduct during the flyback period, the capacitors of said networks being discharged through said diode and said means, characterized in that a network comprising the series arrangement of a capacitor, a fixed resistor and a variable resistor is arranged parallel to said diode, so that due to the adjustment of said resistor the output voltage of the circuit arrangement is a voltage increasing with time, whose differential coefficient with respect to time may either increase or decrease, or remain constant.
Claim 3
Dependent Claim
121 words
A circuit for operating from a power supply comprising a first resistor-capacitor circuit coupled to said supply and having a first time constant; a second resistor-capacitor circuit coupled to said supply and having a second time constant greater than said first time constant, whereby said second circuit capacitor charges slower than said first circuit capacitor, a third resistor-capacitor circuit coupled between said capacitors and having an adjustable time constant substantially larger than said first and second circuits time constants whereby a current flows through said third circuit to additionally charge said second circuit capacitor and said third circuit resistor can be adjusted to result in linear charging of said second circuit capacitor; and means for periodically discharging all of said circuits.
Claim 4
Dependent Claim
121 words
A circuit for operating from a power supply comprising a first resistor-capacitor circuit coupled to said supply and having a first time constant; a second resistor-capacitor circuit coupled to said supply and having a second time constant greater than said first time constant, whereby said second circuit capacitor charges slower than said first circuit capacitor, a third resistor-capacitor circuit coupled between said capacitors and having an adjustable time constant substantially larger than said first and second circuits time constants whereby a current flows through said third circuit to additionally charge said second circuit capacitor and said third circuit resistor can be adjusted to result in linear charging of said second circuit capacitor; and means for periodically discharging all of said circuits.
Claim 5
Dependent Claim
38 words
A circuit as claimed in claim 2 wherein said discharging means comprises a diode having an anode coupled to said second circuit and a cathode coupled to said first circuit; and a switch coupled to said first circuit.
Claim 6
Dependent Claim
14 words
A circuit as claimed in claim 3 wherein said switch comprises a vertical oscillator.
Claim 7
Dependent Claim
18 words
A circuit as claimed in claim 2 further comprising means for amplifying coupled to said second circuit capacitor.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |