Patent ID: 6389315
Filing Date: 2002-05-14
Classification: A61N

Abstract:
An implantable medical device for at least one of delivering a therapy to a patient's body and monitoring a physiologic condition of a patient comprising:a battery to provide battery energy; and at least one integrated circuit powered by the battery and providing control and timing functions, said integrated circuit including: (a) a system clock providing clock signals; (b) clocked logic circuits responsive to said clock signals to perform defined circuit functions in timed synchrony with said clock signals; (c) a clock tree that couples said clock signals from said system clock to the clocked logic circuits; (d) means for sensing a physiologic condition of the patient and providing a physiologic signal; and (e) at least one self-timed logic circuit operating independent of said system clock to process the physiologic signal, whereby the clock tree is minimized and clock energy is conserved; said self-timed logic circuit comprising a signal processor having a plurality of self-timed logic elements formed into a chain, the signal processor receiving the physiologic signal at an input thereof, processing the physiologic signal, and providing the processed physiologic signal at an output after a self-timed logic propagation delay.