Patent ID: 7667521
Filing Date: 2010-02-23
Classification: G11C,H03K

Abstract:
1. A voltage switch circuit of a semiconductor device, the voltage switch circuit comprising: a first transistor and a second transistor coupled to a third terminal, wherein the third terminal receives an enable signal; a third transistor and a fourth transistor coupled to a second terminal, wherein the second terminal receives an operating voltage, wherein the first transistor is connected in series with the third transistor through a second node and the second transistor is connected in series with the fourth transistor through a first node, wherein the third transistor connects to the first node and the fourth transistor connects to the second node to provide a coupling circuit; a fifth transistor connected in series between the first node and a fourth terminal, wherein the fourth terminal provides an output voltage; and a capacitor connected at a first end to a first terminal and at a second end to the fourth terminal in parallel with the fifth transistor, wherein the first terminal receives a clock signal; wherein the fourth terminal outputs a VSS voltage when a VDD voltage is input to the third terminal, and outputs a boosted operating voltage when the VSS voltage is input to the third terminal.