| 摘要 |
PROBLEM TO BE SOLVED: To provide a light and inexpensive power circuit driving the capacitive load of an electroluminescent panel and the like. SOLUTION: A phase inverter 12 has an input terminal connected to the output terminal of a differential amplifier 11 and outputs two output signals whose phases are opposite. A push pull driving circuit 13 has primary and secondary input terminals connected to the phase inverter, and has primary/ secondary output terminals connected to a switching element that is mutually turned on/off by driving it by the two output signals which are supplied from the output terminal of the phase inverter and whose phases are opposite. A single turn transformer 14 has taps 14a and 14b connected to a power terminal and a tap 14c connected to primary/secondary output terminals in the push pull driving circuit. Thus, the capacitive load of the electroluminescent panel 16 and the like can be connected to both sides of the single turn transformer. |
