Transistorized vertical deflection circuit专利检索-推挽输出级电子零件及设备专利检索查询-专利查询网

Transistorized vertical deflection circuit

阅读：762发布：2021-12-21

专利汇可以提供Transistorized vertical deflection circuit专利检索，专利查询，专利分析的服务。并且Transistorized vertical deflection circuit employs output stage of class B, push-pull, complementary symmetry configuration. Miller integration approach is used for sawtooth wave generation, with feedback waveform derived from yoke current sampling resistor. Diode, coupled between ground and base of the (NPN) output transistor which conducts during retrace and first half of scan, operates in Zener region during retrace to hold voltage at joined emitters of output pair at s substantially constant voltage during retrace; output waveform is thereby stabilized against effects of B+ changes due to line voltage variations or loading extremes, and remaining (PNP) output transistor dissipation is held substantially constant in the face of such changes. Diode in feedback path, forward biased when retrace ends, ensures rapid turn-on of driver stage when discharge transistor cuts off; oppositely poled diode in shunt with first feedback diode completes low impedance capacitor discharge path during retrace. One winding half of vertical deflection yoke is shunted by a capacitor of a value selected to introduce cancellation of horizontal frequency components across yoke/pincushion circuitry, in order to minimize feedback of interlace-disturbing horizontal components in deflection circuit.，下面是Transistorized vertical deflection circuit专利的具体信息内容。

权利要求

1. In a television receiver, a vertical deflection circuit comprising, in combination: a vertical deflection output stage including a pair of transistors of opposite conductivity type having their emitter electrodes connected to a common output terminal, their base electrodes connected to an input terminal, and their respective collector electrodes connected to a unidirectional voltage supply terminal and a point of reference potential, respectively, one of said pair of transistors conducting during the initial half of recurring trace intervals and the other conducting during the final half thereof; a vertical deflection yoke winding coupled to said output terminal, flyback pulses appearing across said winding during periodically recurring retrace intervals; a driver transistor having an output electrode; direct current conductive means for coupling said output electrode of said driver transistor to said input terminal of said output stage; means for alternately rendering said driver transistor conducting and nonconducting at a periodic rate, said trace intervals substantially coinciding in time with the periods of conduction by said driver transistor, and said retrace intervals substantially coinciding in time with the periods of nonconduction by said driver transistor; direct current conductive impedance means connected between said supply terminal and said input terminal; and stabilizing means coupled between the base electrode of said one transistor and said point of reference potential for clamping the peaks of said periodically recurring flyback pulses at a substantially constant voltage level.

2. Apparatus in accordance with claim 1 wherein the voltage at said unidirectional voltage supply terminal, during operation of said television receiver, is subject to variation over a given range of voltage levels, and wherein said stabilizing means comprises a diode subject to Zener operation at a voltage level below said given range of voltage levels, and means for connecting said diode between the base electrode of said one transistor and said point of reference potential with a poling relative to said unidirectional voltage supply terminal such that said diode is reverse biased; said driver transistor conducting throughout each trace interval to a sufficient degree to hold said diode out of Zener operation so that said diode is subject to Zener operation only during said periodic retrace intervals when said driver transistor is nonconducting.

3. Apparatus in accordance with claim 2 also including: an additional diode connected between said base electrode of said one transistor and said input terminal, said additional diode being poled for forward conduction during said trace intervals when said driver transistor is conducting; and a capacitor coupled between said output terminal and an intermediate point of said impedance means.

4. A television receiver vertical deflection circuit comprising, in combination: a class B, push-pull, complementary symmetry transistor output stage including an NPN output transistor conducting during periodic retrace intervals and during the initial half of each intervening trace interval, and a PNP output transiStor conducting during the final half of each of said intervening trace intervals, said output transistors having emitter electrodes connected to a common output terminal and base electrodes connected to a common signal source; a deflection winding coupled to said common output terminal; and means for regulating the voltage at said common output terminal during said periodic retrace intervals, said regulating means comprising a diode, connected between the base electrode of said NPN output transistor and a point of reference potential, and subject to reverse biasing to a first degree insufficent to cause Zener breakdown of said diode during said periodic trace intervals, and to a second degree sufficient to ensure Zener breakdown of said diode during said periodic retrace intervals.

5. Apparatus in accordance with claim 4 wherein said common signal source comprises a phase inverting deflection wave amplifier having an input terminal, said deflection circuit also including: resistive means in series with said deflection winding for developing a voltage wave at a feedback terminal in response to deflection current traversing said winding; a feedback path for said voltage wave comprising a capacitor coupled between said feedback terminal and said amplifier input terminal; and means for periodically charging and discharging said capacitor.

6. In a television receiver, a vertical deflection circuit comprising, in combination: a vertical deflection output stage including a pair of transistors of opposite conductivity type having their emitter electrodes connected to a common output terminal, their base electrodes connected to an input terminal, and their respective collector electrodes connected to a unidirectional voltage supply terminal and a point of reference potential, respectively, one of said pair of transistors conducting during the initial half of recurring trace intervals and the other conducting during the final half thereof; a vertical deflection yoke winding coupled to said output terminal, flyback pulses appearing across said winding during periodically recurring retrace intervals; a driver transistor having an output electrode; direct current conductive means for coupling said output electrode of said driver transistor to said input terminal of said output stage; means for alternately rendering said driver transistor conducting and nonconducting at a periodic rate, said trace intervals substantially coinciding in time with the periods of conduction by said driver transistor, and said retrace intervals substantially coinciding in time with the periods of nonconducting said driver transistor; direct current conductive impedance means connected between said supply terminal and said input terminal; and a diode coupled between the base electrode of said one transistor and said point of reference potential, and biased for Zener operation solely during said periodic retrace intervals.

说明书全文

标题	发布/更新时间	阅读量
一种智能型永磁开关控制器	2020-05-08	929
一种减小单相脉冲负载AC-DC电源中电容的方法	2020-05-11	920
一种具有输出管保护的驱动电路	2020-05-12	11
新型手工焊电焊机防触电保护装置	2020-05-11	266
电压变换器及其变压器内的磁通饱和的消除方法	2020-05-11	989
一种旋转变压器信号调理电路及方法	2020-05-08	651
一种车载两用逆变器	2020-05-13	37
一种数字驱动宽频选择超声软组织切割止血系统	2020-05-12	418
一种双向逆变器	2020-05-11	208
一种用于大功率车载双向DC的逆变电路	2020-05-11	107

Transistorized vertical deflection circuit

该功能需要专业版企业版VIP权限，您可以：