| 摘要 |
<p>A convergence correction circuit, for a cathode ray tube (80, 81, 82) projecting images having keystone, differential sinusoidal and differential right-edge curl distortions, comprises generators (10; 120; R102, R103, R104, CR100, Q100) for horizontal-rate, generally sinusoidal, horizontal-rate sawtooth and horizontal-rate pulse waveforms (C, M, K). A summer (45) combines the horizontal-rate waveforms into a horizontal-rate composite waveform (L). A multiplier (60) and an amplifier (71) generate as an output signal (II) a product of the horizontal-rate composite waveform (L) and a vertical-rate sawtooth waveform (F). A convergence correction coil (88) is coupled for receiving the output signal (II) and generating a dynamic magnetic field correcting the keystone, differential sinusoidal and differential right-edge curl distortions. <IMAGE></p> |
