  Tent map is a discrete-time piecewise-affine I/O characteristic curve, which
is used for chaos-based applications, such as true random number generation.
However, tent map suffers from the inability to maintain the output state
confined to the input range under noise and process variations. In this paper,
we propose a modified tent map, which is interchangeable with the tent map for
practical applications. In the proposed modified tent map, the confinement
problem is solved while maintaining the functionality of the tent map. We also
demonstrate simulation results for the circuit implementation of the presented
modified tent map for true random number generation.
