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Compensated linearity regulator for TV line sweep - uses additional winding to modify inductance of regulator coil in dependence of display frequency current
Compensated linearity regulator for TV line sweep - uses additional winding to modify inductance of regulator coil in dependence of display frequency current
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机译:补偿线性度调节器,用于电视线扫描-使用附加绕组来根据显示频率电流修改调节器线圈的电感
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摘要
A linearity regulating stage for line sweep control in television receivers, compensates for the residual error at the top and bottom edges of the screen. The line stage (1) generates a saw tooth waveform signal to a line sweep stage (2) line sweep coil (3) and the coil (Sp) of a linearity regulator (4). The core is pre-magnetised with the aid of a permanent magnet (M). An additional winding (W) providing the necessary compensating effect is coupled to the output of two complementary transistors (T1, T2) in a vertical sweep stage (5). The coupling is effected over two chokes (Dr1, Dr2). The triangular sweep current to the vertical coil (7) exhibits a steep front for fast return and a slow linear sweep.
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