| 摘要 |
PURPOSE:To improve the linearity by providing plural switch circuits and resonance circuits and turning on/off one switch circuit for a period being a half of one period of the resonance frequency of the resonance circuit or below. CONSTITUTION:A 1st switch circuit consists of a field effect transistor (TR) Q1, a diode D1 and a resonance capacitor C, a deflection coil L and a capacitor CS1 form a 1st resonance circuit. Moreover, a 2nd switch circuit consists of a field effect transistor(TR) Q2, a diode D2 and the resonance capacitor C, the deflection coil L and a capacitor CS2 form a 2nd resonance circuit. Then the 1st/2nd resonance circuit supplies a deflection current 1L in a forward/return direction to the coil L. The 1st and 2nd switch circuits repeat on/off operation complementarily and each is operated for a period being a half of one period of the resonance frequency of the resonance circuit or below. Thus, the deflection voltage is biased by the capacitors CS1, 2 to make a change in the deflection current for the forward and return paths equal and then the linearity is improved. |
