| 摘要 |
PROBLEM TO BE SOLVED: To prevent propagation of pulse noise, generated from a PDP panel drive section, to the signal processing section side by a constitution comprising a first low-pass filter inserted into a first power supply line and a second low- pass filter inserted into a second power supply line. SOLUTION: A pulse current noise generated from a panel drive section propagates on the earth line of a first power supply line 6 and arrives at a noise filter 2. In the noise filter 2, capacitors connected in parallel short-circuit the noise and a common mode choke coil connected in series blocks propagation of noise to a DC power supply 1. Consequently, the level of noise propagating to a second power supply line 7 is reduced. Similarly, the noise is reduced again through a noise filter 3 thus preventing propagation of noise furthermore. |
