Patent ID: 7248080
Filing Date: 2007-07-24
Classification: H03K

Abstract:
1. An integrated circuit, comprising: an enable input terminal that is physically accessible externally of the integrated circuit; first and second power supply nodes; functional circuitry that can perform a desired operation, said functional circuitry coupled to said first and second power supply nodes and coupled to said enable input terminal; said enable input terminal receiving an enable signal that is activated when said functional circuitry is to be enabled to perform said desired operation and is deactivated when said functional circuitry is to be disabled from performing said desired operation; and a switch coupled between said functional circuitry and one of said power supply nodes, said switch having a control input coupled to said enable input terminal, said switch isolating said functional circuitry from said one power supply node in response to deactivation of said enable signal and coupling said functional circuitry to said one power supply node in response to activation of said enable signal, wherein said functional circuitry includes analog circuitry, the integrated circuit further including a further switch coupled between a node of said analog circuitry and one of said power supply nodes, said further switch having a control input coupled to said enable input terminal, and said further switch pulling said node of said analog circuit toward a voltage at said one power supply node in response to deactivation of said enable signal and floating said node of said analog circuit in response to activation of said enable signal.