| 摘要 |
PURPOSE:To adjust the waveform of a parabolic wave signal to be supplied to a dynamic convergence yoke over a wide range by adjusting the amplitude of the parabolic wave signal independently at the former half and latter half parts of its one period by the dynamic convergence adjusting circuit of a television receiver which enlarges and projects a television image. CONSTITUTION:A variable resistance 13 is adjusted to mix only the former half part of a saw-tooth wave voltage inputted from an input terminal 9 with the latter half part of a parabolic voltage through the rectification of a diode 14, and thus a voltage adjusted with the composite waveform through a variable resistance 17 is composed to obtain a composite waveform shown by the broken line in a figure (d). Similarly, a variable resistance 16 is adjusted to mix only the latter half part of the saw-tooth wave voltage with the latter half part of the parabolic wave voltage, obtaining a composite waveform shown by the broken line in a figure (f). Then, a signal waveform shown in a figure (f) is inputted to a dynamic convergence output circuit 6, whose output is applied to the horizontal winding of a dynamic convergence yoke 4.
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