电视扫描偏转灵敏度的定义与公式辨析

On the Defenition and Formula for Deflection Sensitivity in Television Scanning System

本文在剖析原电视扫描偏转灵敏度的定义及其表达式后,发现它有严重缺陷,而从另一角度提出了新的定义与相应公式,并阐述了它在实际应用中的意义和作用,同时还证明了为获得线性扫描,偏转线圈电流应为正弦波形。

The change of the motion state of the charge is investigated with the motion law when the charge is under the influence of Lorentz force in a uniform magnetic field. The relationship between the beam deflecting angle and the scanning current is derived, and the definition and formula for the deflection sensitivity are obtained. The applicability of this formula is discussed. Some comments are made on the deflection sensitivity stated in the book 'Circuit Design of the Television Receiver'.To give linear scanning on the screen, it has been proved that the current wave in the winding of the deflection yoke should not be of the sawtooth form but should be of sinusoidal form.