US3766314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized low voltage supply circuit in solid-state t.v. receivers
Assignee: Blaupunkt Werke GmbH
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Filing: 1972-04-03
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Granted: 1973-10-16
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Expires: 1992-04-03
Abstract
Abstract To obtain stabilized low voltage from the horizontal deflection circuit of a T.V. receiver, an additional winding is inductively coupled to the charging inductance in the horizontal deflection circuit, and a rectifier circuit is connected to the additional winding to be responsive to peak voltage value across the additional winding and supply the low voltage. The inductivity of the inductance is of such value that a voltage maximum appears at the inductance during the energy supply interval which is independent of changes in loading on the horizontal deflection circuit, for example by adjusting the inductivity that the peak value thereacross is reached within the first two thirds of the energy supply interval, that is, during line trace; a parallel RC network can be connected into the horizontal deflection circuit so that, when the voltage thereacross exceeds a predetermined level, the excess voltage can be sensed to disconnect the controllable rectifier of the deflection circuit and inhibit further application of power to the inductance upon sensing of an excess voltage level.
Inventors
- 👤 W Riechmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:28
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/085; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185; H04N3/1856
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
206 words
Stabilized low-voltage supply circuit for solid state T.V. receivers having a horizontal deflection circuit including a controllable rectifier (10) connected to the horizontal deflection circuit of the receiver; an inductance (11); and a storage condenser means (13, 14) connected to the inductance (11), charging energy for the storage condenser means (13, 14) being applied over the controllable rectifier (10) through the inductance (11) to the storage condenser means during line tracing intervals and being stored in the storage condenser means, said circuit comprising means (15, 16) connected to and controlling application of energy during the line tracing interval to the charging condenser means (13, 14) to persist for a predetermined supply interval (tL); an additional winding (26) inductively coupled to the inductance (11); and a peak rectifier circuit (27, 28) connected to the additional winding to be responsive to peak values of voltage induced in the additional winding and to supply the low voltage (29) from said rectifier, the inductivity of the inductance being of such value with respect to the duration of the energy supply interval (tL) that a voltage maximum appears at said inductance intermediate of the energy supply interval (tL) and which is independent of changes of loading on the horizontal deflection circuit.
Claim 2
Dependent Claim
206 words
Stabilized low-voltage supply circuit for solid state T.V. receivers having a horizontal deflection circuit including a controllable rectifier (10) connected to the horizontal deflection circuit of the receiver; an inductance (11); and a storage condenser means (13, 14) connected to the inductance (11), charging energy for the storage condenser means (13, 14) being applied over the controllable rectifier (10) through the inductance (11) to the storage condenser means during line tracing intervals and being stored in the storage condenser means, said circuit comprising means (15, 16) connected to and controlling application of energy during the line tracing interval to the charging condenser means (13, 14) to persist for a predetermined supply interval (tL); an additional winding (26) inductively coupled to the inductance (11); and a peak rectifier circuit (27, 28) connected to the additional winding to be responsive to peak values of voltage induced in the additional winding and to supply the low voltage (29) from said rectifier, the inductivity of the inductance being of such value with respect to the duration of the energy supply interval (tL) that a voltage maximum appears at said inductance intermediate of the energy supply interval (tL) and which is independent of changes of loading on the horizontal deflection circuit.
Claim 3
Dependent Claim
32 words
Circuit according to claim 1, wherein the value of the inductance is dimensioned such that the peak voltage thereacross is reached within the first two thirds of the energy supply interval (tL).
Claim 4
Dependent Claim
75 words
Circuit according to claim 1, wherein the value of the inductance is so dimensioned that the voltage thereacross reaches a maximum in advance of termination of the energy supply interval (tL) to provide, in the additional winding (26) a low voltage responsive only to the maximum voltage across the inductance and which is unvarying and essentially independent of loading on the deflection circuit which may occur during the terminal portion of the energy supply interval.
Claim 5
Dependent Claim
91 words
Circuit according to claim 1, further comprising a parallel R-C network (30, 31) connected in the horizontal deflection circuit, said R-C network having a voltage appearing thereacross which, when the potential induced in the inductance (11) exceeds a predetermined level, increases beyond a threshold level; and means (32) transferring this voltage to the controllable rectifier (10) to provide a disabling control voltage to disable the rectifier and interrupt further application of power to the inductance and hence the low-voltage supply and the deflection circuit upon sensing of said increased voltage level.
Claim 6
Dependent Claim
97 words
Circuit according to claim 1, wherein the value of inductance is so dimensioned with respect to the energy supply interval (tL) that the rate of change of flux (d phi /dt) in the inductance reaches a maximum in advance of termination of current flow through the inductance to provide an induced voltage in the additional winding (26) which is responsive to peak induced voltage and essentially independent of loading on the deflection circuit caused by changes in current having a lesser rate of change (d phi /dt) occurring during the terminal portion of the energy supply interval.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |