Abstract: A chaotic random number generator (CRNG) is developed.It is realized by analog circuit,but could be fabricated in a standard digital CMOS process.Thus the CRNG could be used as the intelligent property for the design of an SOC.All capacitors are realized using MOS devices operated in the depletion region,and MOSCAPS are linearized by a series compensation technique.The CRNG has been tapped out in TSMC with a conventional 0.25μm digital n-well CMOS process.Testing of the CRNG chip has also been completed.The test results show that the numbers generated by the CRNG are in fact random.

Key words: random number generator, chaos, MOS capacitor, switched capacitor