Design of high performance Pseudorandom Clock Generator for compressive sampling applications

This paper presents a new design and implementation of a power-optimized Pseudorandom Clock Generator (PRCG) for compressive sampling applications. A Pseudorandom Number Generator (PRNG) is utilized to produce uniformly distributed random numbers which select pseudorandom clock frequencies provided by a matrix of non-uniform ring oscillators. The power fed to the ring oscillators is optimized via a proposed digital circuitry called Power Control Unit which is controlled by the pseudorandom sequences generated. All proposed implementations of the PRCG cells are targeted to the TSMCN65 standard library. Additionally, the characteristics of the generated PR frequencies and the performance of the applied design are analyzed. The simulation results show an average speed of 2.65ns with an average power of 89.73μW supporting frequencies from 1.24 to 7.81 GHz. Moreover, compared to previous references, the results prove up to 86.2%, 22.5% reduction in power and a decrease in die area by 79%.