Patent ID: 6900690
Filing Date: 2005-05-31
Classification: H03K

Abstract:
1. A circuit for use with a supply voltage and an effective ground voltage, comprising: a multi-state circuit that includes a first NMOS device and a first PMOS device, the multi-state circuit being operable to switch between a first state in which the first PMOS device is turned on and the first NMOS device is turned off and a second state in which the first PMOS device is turned off and the first NMOS device is turned on; mode control circuit transistors that serve as power and power ground source transistors when the multi-state circuit is in an active mode and that serves self-reverse biased cut-off transistors when the multi-state circuit is in the standby mode, including, a second NMOS device, with a drain connected to a supply voltage terminal and with a source connected to a source of the first PMOS device; and a second PMOS device, with a drain connected to an effective ground terminal and with a source connected to a source of the first PMOS device; wherein the multi-state circuit and the mode control circuit transistors are disposed in an integrated circuit; means for providing a turn on voltage signal to a gate of the second NMOS device that is higher than the supply voltage when the multi-state circuit is in an active mode; and means for providing a turn on voltage signal to a gate of the second PMOS device that is lower than the effective ground voltage when the multi-state circuit is in an active mode.