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1. 发明授权

US6166922A Current oscillation control resonance circuit and power supply apparatus utilizing the same circuit 失效
标题翻译：电流振荡控制谐振电路和使用相同电路的电源装置
公开(公告)号：US6166922A
公开(公告)日：2000-12-26
申请号：US426342
申请日：1999-10-25
申请人： Makoto Kobori , Susumu Kaneko
发明人： Makoto Kobori , Susumu Kaneko
IPC分类号： H02M3/28 , H02M3/335 , H02M3/337 , H02M3/24 , H02M5/42
CPC分类号： H02M3/3376
摘要： A current detecting circuit detects amplitude of a current flowing toward the connecting point of a first transistor and a serial circuit through a second transistor and a comparing circuit compares amplitude of the current detected by the current detecting circuit with the reference value. An oscillation control circuit controls a control current supplied to an oscillating circuit in order to raise the oscillation frequency of the oscillating circuit when amplitude of the current detected by the current detecting circuit is smaller than the reference value as a result of comparison by the comparing circuit in view of preventing the oscillation frequency to be further lowered. Therefore, it is no longer required to design the apparatus by giving allowance to take into consideration the temperature characteristics and fluctuation of parts unlike the related art in which the minimum oscillation frequency of the oscillating circuit is set. Accordingly, variable range of the oscillation frequency can be expanded. As a result, it can be prevented that variable range of the oscillation frequency of the oscillating circuit becomes narrower.
摘要翻译：电流检测电路检测通过第二晶体管流向第一晶体管和串联电路的连接点的电流的振幅，并且比较电路将由电流检测电路检测的电流的幅度与基准值进行比较。作为比较电路的比较结果，振荡控制电路控制提供给振荡电路的控制电流，以便提高振荡电路的振荡频率，当电流检测电路检测到的电流的振幅小于参考值时考虑到防止振荡频率进一步降低。因此，与设定振荡电路的最小振荡频率的现有技术不同，不需要设计该装置来考虑部件的温度特性和波动。因此，可以扩大振荡频率的可变范围。结果，可以防止振荡电路的振荡频率的可变范围变窄。

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