Patent ID: 6157231
Filing Date: 2000-12-05
Classification: H03K,H03L

Abstract:
A system for stabilizing a delay through a signal path of an integrated circuit (IC), wherein said signal path is formed by first transistors, wherein said delay depends on signal propagation speed of said first transistors which is in turn influenced by a temperature of said IC and by a magnitude of a power supply signal applied to said IC, the system comprising:an oscillator for producing a periodic first reference signal, said oscillator comprising gate means internal to said IC having an input and an output and delay means external to said IC for connecting said input to said output,a delay circuit for delaying said first reference signal to produce a periodic second reference signal, andcontroller means for receiving said first and second reference signals and for controlling said magnitude of said power supply signal so as to maintain a constant phase difference between said first and second reference signals.