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111. 发明授权

US5801934A Charge pump with reduced power consumption 失效
标题翻译：充电泵具有降低的功耗
公开(公告)号：US5801934A
公开(公告)日：1998-09-01
申请号：US762871
申请日：1996-12-12
申请人： Timothy M. Lacey , Aaron Yip
发明人： Timothy M. Lacey , Aaron Yip
IPC分类号： H02M3/07 , H03K19/00 , H02M3/18
CPC分类号： H03K19/0016 , H02M3/073
摘要： The present invention concerns an improved charge pump. The charge pump efficiently charges a voltage signal while reducing its power consumption. The charge pump includes at least one diode configured to receive a voltage signal. Coupled to the diode(s) is at least one capacitive device that is capable of coupling charge onto the diode(s). For one embodiment, the capacitive device provides a constant capacitance to more efficiently charge the voltage signal. The charge pump also includes an oscillating circuit that is capable of providing each capacitive device with an oscillating signal that alternates between a first voltage level and a second voltage level at a predetermined frequency. The oscillating circuit includes an odd number of N inverters coupled in a ring wherein an output of the Nth inverter is coupled to the input of the first inverter. For an alternative embodiment, each of the N inverters may anticipate a voltage switch on its inputs and therefore capable of powering "off" before the voltage switch occurs. As such, unnecessary power consumption resulting from the short circuit current in each of the N inverters is substantially reduced or eliminated.
摘要翻译：本发明涉及改进的电荷泵。电荷泵有效地对电压信号充电，同时降低其功耗。电荷泵包括被配置为接收电压信号的至少一个二极管。耦合到二极管的是至少一个能够将电荷耦合到二极管上的电容器件。对于一个实施例，电容器件提供恒定的电容以更有效地对电压信号进行充电。电荷泵还包括振荡电路，其能够为每个电容器件提供在预定频率下在第一电压电平和第二电压电平之间交替的振荡信号。振荡电路包括耦合在环中的奇数N个反相器，其中第N个反相器的输出耦合到第一反相器的输入。对于替代实施例，N个逆变器中的每一个可以预期在其输入端上的电压开关，因此能够在电压开关发生之前“断开”电源。因此，N个逆变器中的每一个中的短路电流导致的不必要的功率消耗被显着地减少或消除。

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