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    • 6. 发明公开
    • Power-supply circuit
    • STROMVERSORGUNGSSCHALTUNG
    • EP2405318A1
    • 2012-01-11
    • EP10168542.8
    • 2010-07-06
    • ST-Ericsson SA
    • Johnasson, Henrik
    • G05F1/577H02M3/335
    • G05F1/577H02M1/44H02M3/156H02M2001/0045H02M2001/0048Y02B70/1491
    • A power-supply circuit (10) for an electronic circuit (2) having a plurality of functional units (5-1,...,5- N ) is disclosed. The power-supply circuit (10) comprises a plurality of supply-voltage regulators (30-1,...,30- N ), each adapted to provide an output supply voltage to a corresponding one of the functional units (5-1,...,5- N ) and each having a disabled and an enabled state. Furthermore, the power-supply circuit (10) comprises a preregulator (20) adapted to provide a common intermediate supply voltage to all of the supply-voltage regulators (30-1,...,30- N ), wherein the preregulator (20) is adapted to generate the intermediate supply voltage such that it follows a reference level of the preregulator. Moreover, the power-supply circuit (10) comprises a control unit (40) adapted to control the reference level of the preregulator (20) at least based on which of the supply-voltage regulators (30-1,...,30- N ) are currently in the enabled state and which of the supply-voltage regulators (30-1,...,30- N ) are currently in the disabled state. A related method of operating the power-supply circuit (10), a related computer program product, and a related computer-readable medium are also disclosed.
    • 公开了一种具有多个功能单元(5-1,...,5- N)的电子电路(2)的电源电路(10)。 电源电路(10)包括多个电源电压调节器(30-1,...,30-N),每个电源电压调节器适于向相应的一个功能单元(5-1)提供输出电源电压 ,...,5- N),并且每个具有禁用和启用状态。 此外,电源电路(10)包括预调节器(20),其适于向所有电源电压调节器(30-1,...,30-N)提供公共的中间供电电压,其中预调节器 20)适于产生中间电源电压,使得其遵循预调节器的参考电平。 此外,电源电路(10)包括控制单元(40),其适于至少基于哪个电源电压调节器(30-1,...,30)来控制前置调节器(20)的参考电平 - N)当前处于使能状态,哪个电源电压调节器(30-1,...,30-N)当前处于禁用状态。 还公开了操作电源电路(10),相关的计算机程序产品和相关的计算机可读介质的相关方法。
    • 10. 发明公开
    • Switching regulator and control method
    • 开关稳压器和控制方法
    • EP0694826A2
    • 1996-01-31
    • EP95305186.9
    • 1995-07-25
    • International Business Machines Corporation
    • Narita, IzuruIwami, Tomoyuki
    • G05F1/577
    • G05F1/577H02M3/33561
    • The present invention relates to an information processing apparatus that comprises a plurality of electric circuits and that has power supply lines for the individual electric circuits. It provides a switching regulator that controls the power that is supplied by an external power source to such an information processing apparatus, while inhibiting power waste, and the information processing apparatus and a method for its control.
      The information processing apparatus, which is activated by power supplied from an external power source, comprises: a first power supply line for supplying power to a first electric circuitry; a second power supply line for supplying power to a second electric circuitry; a i-th power supply line for supplying power to a i-th electric circuitry (i is an integer of 1 ≦ i ≦ n, and n is an integer equal to 2 or greater); means for monitoring a first voltage of the first power supply line; means for monitoring a second voltage of the second power supply line; means for monitoring a i-th voltage of the i-th power supply line; means for selecting the minimum voltage among the first through the i-th voltages; means for comparing the minimum voltage with a previously given reference voltage; and connecting/disconnecting means for starting or halting the power supply from the external power source in response to the comparison result. As the lowest voltage can be used as a feedback target, the application of a high voltage is not required even if the safety of the system is taken into consideration and power will not be wasted.