Transistor deflection circuits utilizing a class b, push-pull output stage
阅读：421发布：2021-12-18
专利汇可以提供Transistor deflection circuits utilizing a class b, push-pull output stage专利检索，专利查询，专利分析的服务。并且Transistorized vertical deflection circuit employs a multi-stage deflection wave amplifier including an output stage of a Class B, push-pull, complementary-symmetry type, with vertical yoke windings driven by output stage emitters. Ground return for vertical yoke windings is effected via path including electrolytic capacitor and current sampling resistor, with the capacitor blocking the flow through the yoke windings of direct current from the output stage. Deflection circuit employs Miller Integrator approach to sawtooth wave generation, developing sawtooth wave across a second capacitor included in a negative feedback path looped about the multi-stage deflection amplifier, the feedback voltage being derived from the current sampling resistor. Feedback use enables employment of relatively lowvalued electrolytic capacitor for the D.C. blocking function without introducing undesired distortion of deflection current waveform. Vertical rate parabolic voltage developed across lowvalued electrolytic capacitor is of adequate magnitude to serve as input waveform for vertical dynamic convergence circuits. In one embodiment, electrolytic capacitor serves as parabola source for additional feedback to Miller Integrator input in order to effect S-shaping of deflection wave.，下面是Transistor deflection circuits utilizing a class b, push-pull output stage专利的具体信息内容。
1. A transistor vertical deflection circuit for use in a television receiver comprising, in combination: a deflection wave amplifier having an input terminal; a deflection wave output stage having an output terminal, said deflection wave amplifier and output stage being connected in cascade to provide at said output terminal an output deflection waveform which is inverted in phase relative to an input deflection waveform appearing at said input terminal; a deflection coil; a first capacitor; a deflection current sampling resistor; means coupling said deflection coil, said first capacitor and said current sampling resistor in series, in the order named, between said output terminal and a point of reference potential; means coupled to the junction of said first capacitor and said resistor for establishing a negative feedback path between said junction and said input terminal, said negative feedback path including a second capacitor; means, including a discharge stage coupled to said input terminal, for alternately charging and discharging said second capacitor at a vertical deflection rate to develop at said input terminal a sawtooth voltage wave as said input deflection waveform; and wave shaping means having an input coupled to said first capacitor and responsive to a parabolic voltage component developed across said first capacitor.
1. A transistor vertical deflection circuit for use in a television receiver comprising, in combination: a deflection wave amplifier having an input terminal; a deflection wave output stage having an output terminal, said deflection wave amplifier and output stage being connected in cascade to provide at said output terminal an output deflection waveform which is inverted in phase relative to an input deflection waveform appearing at said input terminal; a deflection coil; a first capacitor; a deflection current sampling resistor; means coupling said deflection coil, said first capacitor and said current sampling resistor in series, in the order named, between said output terminal and a point of reference potential; means coupled to the junction of said first capacitor and said resistor for establishing a negative feedback path between said junction and said input terminal, said negative feedback path including a second capacitor; means, including a discharge stage coupled to said input terminal, for alternately charging and discharging said second capacitor at a vertical deflection rate to develop at said input terminal a sawtooth voltage wave as said input deflection waveform; and wave shaping means having an input coupled to said first capacitor and responsive to a parabolic voltage component developed across said first capacitor.
2. Apparatus in accordance with claim 1 wherein said output stage includes a pair of transistors of opposite conductivity types disposed in a push-pull, complementary-symmetry configuration, direct current conductive connections being provided between the emitter electrodes of said transistors and said output terminal.
3. A transistor vertical deflection circuit for use in a television receiver with a color image reproducer employing dynamic beam convergence apparatus comprising, in combination: a deflection wave amplifier having an input terminal; a deflection wave output stage having an output terminal, said deflection wave amplifier and output stage being connected in cascade to provide at said output terminal an output deflection waveform which is inverted in phase relative to an input deflection waveform appearing at said input terminal, and said output stage including a pair of transistors of opposite conductivity types disposed in a push-pull complementary-symmetry configuration, direct current conductive connections being provided between the emitter electrodes of said transistors and said output terminal; a deflection coil; a first capacitor; a deflection current sampling resistor; means coupling said deflection coil, said first capacitor and said current sampling resistor, in the order named, between said output terminal and a point of reference potential; means coupled to the juncTion of said first capacitor and said resistor for establishing a negative feedback path between said junction and said input terminal, said negative feedback path including a second capacitor; means, including a discharge stage coupled to said input terminal, for alternately charging and discharging said second capacitor at a vertical deflection rate to develop at said input terminal a sawtooth voltage wave as said input deflection waveform; and wave shaping means having an input coupled to said first capacitor and responsive to a parabolic voltage component developed across said first capacitor, wherein said wave shaping means comprises means for deriving from said parabolic voltage component convergence current waveforms for energizing said beam convergence apparatus.
4. A transistor vertical deflection circuit for use in a television receiver comprising, in combination: a deflection wave amplifier having an input terminal; a deflection wave output stage having an output terminal, said deflection wave amplifier and output stage being connected in cascade to provide at said output terminal an output deflection waveform which is inverted in phase relative to an input deflection waveform appearing at said input terminal, and said output stage including a pair of transistors of opposite conductivity types disposed in a push-pull complementary-symmetry configuration, direct current conductive connections being provided between the emitter electrodes of said transistors and said output terminal; a deflection coil; a first capacitor; a deflection current sampling resistor; means coupling said deflection coil, said first capacitor and said current sampling resistor; in the order named, between said output terminal and a point of reference potential; means coupled to the junction of said first capacitor and said resistor for establishing a negative feedback path between said junction and said input terminal, said negative feedback path including a second capacitor; means, including a discharge stage coupled to said input terminal, for alternately charging and discharging said second capacitor at a vertical deflection rate to develop at said input terminal a sawtooth voltage wave as said input deflection waveform; and wave shaping means having an input coupled to said first capacitor and responsive to a parabolic voltage component developed across said first capacitor, wherein said wave shaping means comprises means responsive to said parabolic voltage component for causing S-shaping of said output waveform.
5. In a color television receiver including dynamic beam convergence apparatus, a vertical deflection circuit comprising, in combination: a vertical deflection output stage including a pair of transistors of opposite conductivity types, direct current conductive connections between the emitter electrodes of said transistors and a common output terminal, direct current conductive connections between the base electrodes of said transistors and an input terminal, a direct current conductive connection between the collector electrode of one of said transistors and a unidirectional voltage supply terminal, and a direct current conductive connection between the collector electrode of the other of said transistors and a point of reference potential; a vertical deflection yoke winding; an electrolytic capacitor; a deflection current sampling resistor; a load circuit for said output stage including said yoke winding, said capacitor and said sampling resistor connected in series, in the order named, between said output terminal and said point of reference potential, whereby the flow of vertical rate deflection current in said load circuit develops a vertical rate parabolic voltage component across said capacitor and a vertical rate sawtooth voltage component across said resistor; a phase inverting deflection wave amplifier having an input circuit and an output circuit, said output circuit being dIrect current conductively connected to said input terminal of said output stage; means providing feedback of said sawtooth voltage component to said amplifier input circuit; and means coupled to said capacitor and responsive to said parabolic voltage component for deriving vertical rate convergence current waveforms for said beam convergence apparatus.
6. Apparatus in accordance with claim 5 including additional means providing feedback to said amplifier input circuit of a D.C. component derived from said output terminal in order to effect output stage operating point stabilization.
7. Apparatus in accordance with claim 6 wherein said sawtooth voltage component feedback providing means comprises a second capacitor, and wherein said D.C. component feedback providing means additionally serves to integrate the A.C. voltage waveform appearing at said output terminal and to apply the resultant parabolic waveform via a second resistor to said amplifier input circuit so as to S-shape the current flowing in said yoke winding.
8. Apparatus in accordance with claim 6 wherein said sawtooth voltage component feedback providing means comprises a second capacitor, said apparatus also including resistive means coupled to said first capacitor and responsive to said parabolic voltage component for providing additional feedback to said amplifier input circuit so as to S-shape the current flowing in said yoke winding.
9. Apparatus in accordance with claim 8 wherein said D.C. component feedback providing means includes means for substantially precluding feedback therethrough of A.C. components.
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