首页> 外国专利> Vertical deflection signal precorrection circuit for a display tube and television receiver comprising such a circuit

Vertical deflection signal precorrection circuit for a display tube and television receiver comprising such a circuit

机译:用于显示管的垂直偏转信号预校正电路和包括该电路的电视接收机

摘要

1. Precorrection circuit of the vertical sweeping signal of a visualization tube, the sweeping being piloted by an oscillator (1) supplying a saw-tooth signal (Vb ), this precorrection circuit being characterized in that it comprises : - a switch on polarity reversal circuit (6) that receives on its input terminal the saw-tooth signal (Vb ) and returns on its exit terminal a triangular signal (Ie ), obtained by polarity reversal of a fraction of the saw-tooth, with respect to a reference voltage (Vref ) comprised between the two peak voltages of the saw-tooth ; - an electronic circuit (5) that receives on its input terminal the saw-tooth signal (Vb ) issuing from the oscillator (1) and on its control terminal the triangular signal (Ie ) issuing from the polarity reversal circuit (6), this electronic circuit delivering on its output terminals two saw-tooth currents (I1 and I2 ), in the same direction and of the same period as the input saw-tooth signal (Vb ), one of the currents being affected by an S correction in one direction and the other current being affected by the same correction but in the opposite direction ; - a subtracting circuit (7) that receives on its two input terminals the two currents (I1 and I2 ) issuing from the electronic circuit (5) and returning on its input terminal the precorrection signal (VS ), by elimination of the saw-tooth component.
机译:1.显像管的垂直扫描信号的预校正电路,该扫描由提供锯齿信号(Vb)的振荡器(1)控制,该预校正电路的特征在于它包括:-极性反转开关电路(6)在其输入端接收锯齿信号(Vb),并在其出口端返回一个三角信号(Ie),该信号通过将一部分锯齿相对于参考电压极性反转而获得(Vref)介于锯齿的两个峰值电压之间; -电子电路(5),其输入端接收从振荡器(1)发出的锯齿信号(Vb),并在其控制端接收从极性反转电路(6)发出的三角信号(Ie),电子电路在其输出端子上以与输入锯齿信号(Vb)相同的方向和相同的周期在其输出端子上传递两个锯齿电流(I1和I2),其中一个电流受一个S校正的影响方向和其他电流受到相同的校正但方向相反; -减法电路(7),在其两个输入端子上接收从电子电路(5)发出的两个电流(I1和I2),并通过消除锯齿而在其输入端子上返回预校正信号(VS)。零件。

著录项

  • 公开/公告号EP0024223B1

    专利类型

  • 公开/公告日1984-02-01

    原文格式PDF

  • 申请/专利权人 THOMSON-CSF;

    申请/专利号EP19800401086

  • 发明设计人 VAN DEN DRIESSCHE MICHEL;

    申请日1980-07-22

  • 分类号H04N3/16;

  • 国家 EP

  • 入库时间 2022-08-22 09:00:35

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