a horizontal s - shaped correction signal circuit having a correction condenser disposed in a cathode ray tube horizontal deflection circuit such as in a television receiver , a display monitor , etc . in particular , a horizontal s - shaped correction signal circuit which is capable of obtaining an accurate correction effect and a desired adjustment . the total capacitance of the correction condenser c s for a horizontal deflection circuit is variable by selectively connecting in parallel therewith correction condensers c s1 and c s2 by switches sw 1 and sw 2 during the scanning interval . therefore , the correction characteristic is improved . namely , it is possible to obtain a highly accurate s - shaped correction signal . in addition , it is possible to independently control the width of the front portion and rear portion of the horizontal scanning interval by controlling externally inputted direct control current signals da - c tl1 and da - c tl2 . furthermore , it is possible to vary the s - shaped correction signal width depending on the vertical scan position on the screen .