METHOD AND APPARTUS FOR ACCOUNTING FOR CHANGES IN TRANSISTOR CHARACTERISTICS

摘要

PURPOSE: A method and an apparatus for measuring the change of characteristics of a transistor by monitoring the current of the transistor are provided to control the threshold voltage of a transistor. CONSTITUTION: A comparator receives reference signals and feedback signals from a transistor and includes an output terminal. A bias voltage generator comprises an input terminal connected to the output terminal of the comparator and an output terminal connected to the transistor.