公开(公告)号：EP2040378A1

公开(公告)日：2009-03-25

申请号：EP06780693.5

申请日：2006-06-30

Applicant: Renesas Technology Corp.

Inventor： TAKAI, Kazuyoshi ,  YASHITA, Takahiro ,  KATO, Kikuo ,  KUBO, Kazuaki

IPC: H03K17/06

CPC classification number: H03K17/6874 ,  H02M3/07 ,  H02M2003/072 ,  H03K17/063 ,  H03K17/102 ,  H03K17/693 ,  Y10T307/625 ,  Y10T307/76

Abstract: In a power phase period when in normal operation, switch portions SW2H and SW2L and switch portions SW3H and SW3L are turned ON, respectively, and switch portions SW1H and SW1L are turned OFF. And floating power supply is provided from an electrostatic capacitance element CS to buses A and B, a floating control circuit 4, a transmitter circuit 5, and a receiver circuit 6, respectively. In a data phase period, the switch portions SW1H and SW1L are turned ON, and the switch portions SW2H, SW2L, SW3H, and SW3L are turned OFF. By that manner, the electrostatic capacitance element CS is charged by the power supply of a battery B, and an electrostatic capacitance element CH provides the floating power supply to the floating control circuit 4, the transmitter circuit 5, and the receiver circuit 6, respectively. By this manner, a floating switch unit 7 in which the number of the switch portions is considerably reduced can be configured.

Abstract translation: 在通常动作的电力相位期间，开关部SW2H，SW2L和开关部SW3H，SW3L分别导通，开关部SW1H，SW1L分别断开。 并且浮动电源分别从静电电容元件CS提供给总线A和B，浮动控制电路4，发送器电路5和接收器电路6。 在数据相位期间，开关部分SW1H和SW1L导通，开关部分SW2H，SW2L，SW3H和SW3L截止。 通过这种方式，静电电容元件CS由电池B的电源充电，静电电容元件CH分别向浮动控制电路4，发送器电路5和接收器电路6提供浮动电源 。 通过这种方式，可以构成开关部分的数量明显减少的浮动开关单元7。