Category:Software that uses Qt1. Field of the Invention
This invention relates to a semiconductor integrated circuit device comprising a plurality of externally accessible I/O terminals and a plurality of internal circuit elements which are connected to the I/O terminals, and more particularly to a semiconductor integrated circuit device whose internal circuit elements such as transistors are rendered inactive by a back bias voltage.
2. Description of the Prior Art
In general, the operation of a transistor which is used as an internal circuit element in an integrated circuit device is seriously influenced by a back bias voltage which is applied to the source of the transistor when it is rendered inactive. In an integrated circuit device which comprises a plurality of transistors, the state in which a back bias voltage is applied to all the transistors is called an inactive state, and the voltage or current in the transistors is generally kept at a level much lower than the power supply voltage by the application of the 0b46394aab