Top/bottom pincushion correction circuit

摘要: A pincushion correction circuit has a pair of circuits unit, respective unit having first and second differential comparator (2, 3) for sampling the upper portion lower vertical sawtooth wave signal, respectively, multiplier (4, 5) squaring outputs said 3), amplitude adjusting (6, 8), besides conventional voltage/current converter (11), (13) an amplifier (15), both two 8) are given through adder (10) to (15); whereby top bottom distortions individually adjustable.