Drive circuit with a ring oscillator for a semiconductor device

摘要

A drive circuit for driving a semiconductor device includes a reference voltage level generator for outputting a reference voltage level which is associated with an input voltage level from an external power source. Supplied with the reference level, a ring oscillator oscillates a frequency signal having a predetermined frequency. A drive voltage level generator responds to the reference level and the frequency signal for producing a drive voltage level which is constantly substantially equal to the reference level in synchronism with the frequency signal. The drive voltage level generator feeds power from the external power source to the semiconductor device at the drive level, thereby driving the semiconductor load circuit.