| 摘要 |
<p>In a horizontal output circuit having a east and west pincushion distortion correcting function modulating the amplitude of a horizontal deflecting current to be parabolic in a vertical period by using a pulse width variable pulse signal, a voltage produced in a capacitor C1 provided between a series circuit of a horizontal deflecting coil Dy and S correcting capacitor Cs connected in parallel to a horizontal output transistor Q3 and a reference potential point GND is modulated by using a pulse signal from a pulse width modulating IC 10 and is fed to a smooth circuit comprising a coil L2 and capacitor C2 provided in parallel with the capacitor C1. A negative power source is obtained by this smooth circuit and is fed to a power source terminal 13 of the pulse width modulating IC 10. That is to say, a negative voltage -V1ave produced in the capacitor C2 is integrated, the voltage is stored in said capacitor C2 and this average voltage -V1ave is fed as a negative power source to the power source terminal 13 of the pulse modulating IC 10 in the formation. Thereby, a power source which can discharge and has little power loss can be formed of a small number of component parts. <MATH></p> |
