Abstract
We have studied the requirements and circuit architecture of bladder pressure measurement system. To realize low power operation, decreasing the operating frequency of the micro computer is necessary. We show ring oscillator is an appropriate clocking topology to control the operating frequency. We also propose a system for frequency synchronization between inside and outside of our body, using pulse injection locking and verify the applicability of it through simulations. The results of the simulation shows ±10% supply voltage variation can be absorbed by the system without induce deterministic jitter.
