Wide angle deflection system专利检索-电容反馈互阻抗放大器跨阻放大器电子零件及设备专利检索查询-专利查询网

Wide angle deflection system

阅读：117发布：2020-11-05

专利汇可以提供Wide angle deflection system专利检索，专利查询，专利分析的服务。并且Wide angle (e.g., 110*), large screen (e.g., 25 inch diagonal) color television display system employs a narrow-neck (e.g., 29 centimeter diameter) color kinescope with a deflection yoke having toroidal horizontal and vertical deflection windings. While power requirements of toroidal horizontal windings are met by a thyristor horizontal deflection circuit, toroidal vertical windings are driven by a transistor vertical output amplifier in a quasi-complementary symmetry, Class B, push-pull configuration. Capacitor is provided in negative feedback path between amplifier output and driver input, establishing Miller integrator action for linear sawtooth wave generation. Diode in series with capacitor provides voltage rise aiding rapid turn-on of driver at end of retrace interval. Oppositely poled diode shunting first diode completes low impedance capacitor discharge path during retrace interval.，下面是Wide angle deflection system专利的具体信息内容。

权利要求

1. In combination with a narrow-neck, large screen shadow-mask color kinescope; a wide-angle toroidal deflection yoke mounted on said kinescope neck and having respective vertical deflection winding halves and respective horizontal deflection winding halves; and a thyristor horizontal deflection circuit driving said horizontal deflection winding halves in parallel; apparatus comprising: a vertical deflection circuit including a quasi-complementary symmetry, Class B, push-pull output, transistor deflection wave amplifier; and means providing a transformerless coupling of the output of said quasi-complementary symmetry amplifier across the series combination of said vertical deflection winding halves of said toroidal yoke; said vertical deflection circuit also including: a pre-driVer transistor stage having an input terminal, and having an output terminal for supplying input signals to said quasi-complementary symmetry amplifier; resistive means in series with said vertical winding halves for developing a voltage wave at a feedback terminal in response to deflection current traversing said winding halves; a feedback path for said voltage wave comprising a capacitor coupled between said feedback terminal and said predriver transistor input terminal; and means for periodically charging and discharging said capacitor; said feedback path also including a diode in series with said capacitor, said diode being poled for forward conduction upon charging of said capacitor.

2. Apparatus in accordance with claim 1 wherein said feedback path also includes an additional diode connected in shunt with said first-named diode but with opposite poling for forward conduction upon discharging of said capacitor.

3. A transistor deflection circuit including: a phase-inverting deflection wave amplifier having an input terminal and an output terminal; a deflection yoke winding; a current sampling resistor; means for connecting said winding and said resistor in series between said output terminal and a point of reference potential a feedback path including a capacitor coupled between the junction of said winding and resistor and said input terminal; a charging potential source; a charging resistor coupled between said source and said input terminal; a discharge transistor coupled between said input terminal and a point of reference potential, and subject to periodic conduction and non-conduction; and a pair of paralleled oppositely poled diodes disposed in said feedback path in series with said capacitor.

4. A transistor deflection circuit including: a multistage phase-inverting deflection wave amplifier having an input terminal and an output terminal, and including an input stage transistor coupled to said input terminal; a deflection yoke winding; a current sampling resistor; means for connecting said winding and said resistor in series between said output terminal and a point of reference potential; a feedback path including a capacitor coupled between the junction of said winding and resistor and said input terminal; a charging potential source; charging resistance means coupled between said source and said input terminal and including a variable resistor for controlling the rate of charging of said capacitor; means including a discharge transistor, coupled between said input terminal, and a point of reference potential, and subject to periodic conduction and non-conduction, for periodically discharging said capacitor, the conduction of said discharge transistor effecting the discharging of said capacitor and cutting off said input stage transistor; means for effecting a step rise in the potential at said input terminal, upon each periodic cessation of conduction by said discharge transistor, at a rate substantially higher than said charging rate, the magnitude of said step rise in potential being substantially independent of the setting of said variable resistor, said effecting means comprising a first diode, in series with said capacitor in said feedback path, and poled for forward conduction upon charging of said capacitor; and means for bypassing said first diode during the discharging of said capacitor, said bypassing means comprising a second diode in shunt with said first diode and poled for forward conduction upon discharging of said capacitor.

5. Apparatus in accordance with claim 4 wherein said multistage amplifier includes a quasi-complementary symmetry push-pull output circuit responsive to the output of said input stage transistor and capacitively coupled to the series combination of said deflection yoke winding and current sampling resistor.

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Wide angle deflection system

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