半导体器件没有灯丝，因此也不需加热功率或加热时间。
Semiconductor devices have no filament or heaters and therefore require no heating power or warm-up time.
本发明提出了一种高效电子镇流器，由整流滤波电路、高频逆变电路、功率调节电路及灯丝预热电路组成。
The efficient electronic ballast is composed of rectifier-filter circuit, high-frequency inverse transforming circuit, power regulation circuit and filament preheating circuit.
介绍了一种采用自适应技术的开关型稳压电源，对电视发射机大功率发射管的冷态灯丝平滑上电压，有效提高了发射管的使用寿命。
The switch mode regulated power supply using self - adjusting technique is introduced. In TV transmitter, it is used to the large power transmit-ting tubes with variable voltage for cold filament.
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