公开(公告)号：US20020005733A1

公开(公告)日：2002-01-17

申请号：US09949703

申请日：2001-09-10

Applicant: STMicroelectronics Limited

Inventor： William B. Barnes

IPC: H03K017/16

CPC classification number: H01L29/0634 ,  H03K3/356113 ,  H03K17/102

Abstract: A switching circuit is discussed that has an improved switching time in comparison with switching circuits of a known type. The circuit comprises three switches connected in series, the first switch being connected to an upper power supply and the third switch being connected to a lower power supply. The output of the circuit is connected to a circuit node located at the connection between the second and third switch. The input to the switching circuit is also connected to the third switch and additionally connected to a control circuit which provides a further output to control the first switch. The second switch is responsive to the voltage at the circuit node such that the second switch only conducts when the voltage at the output node falls below the upper supply voltage. This has the effect that the first switch is effectively isolated from the third switch during switching and allows a time delay during which the first switch is switched off under control of the control circuit and the second switch switches on. The provision of the voltage dependent second switch eliminates any nullcurrent battlesnull occurring between the first and third switch during switching.

Abstract translation: 讨论了与已知类型的开关电路相比具有改进的开关时间的开关电路。 电路包括串联连接的三个开关，第一开关连接到上电源，第三开关连接到较低电源。 电路的输出连接到位于第二和第三开关之间的连接处的电路节点。 开关电路的输入也连接到第三开关，并且还连接到控制电路，该控制电路提供另外的输出以控制第一开关。 第二开关响应于电路节点处的电压，使得第二开关仅在输出节点处的电压下降到低于上电源电压时才导通。 这具有在开关期间第一开关与第三开关有效隔离的作用，并且允许第一开关在控制电路的控制下被切断并且第二开关导通的时间延迟。 提供依赖于电压的第二开关消除了在切换期间在第一和第三开关之间发生的任何“当前的战斗”。