Patent ID: 6803800
Filing Date: 2004-10-12
Classification: H03K

Abstract:
A switch having a control end and a voltage output end comprising:a first inverting unit and a second inverting unit, each having an input end and an output end; wherein when the input end of said inverting unit receives a ground voltage, a positive voltage differing from the ground voltage is outputted from the output end of the inverting unit; a first driving unit and a second driving unit, each having an input end and an output end; wherein both the input ends of the first driving unit and the second driving unit are electrically connected to the output ends of the second inverting unit and the first inverting unit at a second node and a first node, respectively; the output ends of the first driving unit and the second driving unit are electrically connected to the first node and the second node; and when the positive voltage is inputted to the input end of a driving unit, a negative voltage differing from the ground voltage and the positive voltage is outputted from the output end of the driving unit; a negative voltage transferring unit electrically connected between the second node and the voltage output end; wherein when the positive voltage is inputted to the negative voltage transferring unit at the second node, the negative voltage transferring unit is turned on, and transmits the negative voltage to the voltage output end; and when the negative voltage is inputted to the negative voltage transferring unit at the second node, the negative voltage transferring unit is turned off, and stops transmitting the negative voltage to the voltage output end; a ground voltage transferring unit electrically connected between the first node and the voltage output end, wherein when the positive voltage is inputted at the first node, the ground voltage transferring unit outputs the ground voltage at the voltage output end, such that the when the input end of the first inverting unit inputs the ground voltage, leading to the negative voltage transferring unit turning off, the ground voltage transferring unit outputs the ground voltage at the voltage output end; and an inverter electrically connected between the input ends of the first inverting unit and the second inverting unit for ensuring a polarity phase of the voltage at the input end of the first inverting unit is opposite to the voltage at the input end of the second inverting unit; wherein the switch causes the input end of the first inverting unit to accept the positive voltage or the negative voltage based on the received signal with respect to the control end; when the positive voltage is inputted into the input end of the first inverting unit, the inverter makes the input end of the second inverting unit accept the ground voltage, and outputs the positive voltage at the second node, such that the negative voltage transferring unit turns on, and outputs the negative voltage at the voltage output end; when the ground voltage is inputted into the input end of the first inverting unit, the first inverting unit outputs the positive voltage at the first node, resulting in the second driving unit outputting the negative voltage at the second node, and the negative voltage transferring unit turning off, and thus stopping outputting the negative voltage at the voltage output and.