Fig. 6: Performance and energy consumption comparison between the stochastic and conventional Roberts cross operators.

Circuit designs of a our stochastic and b the conventional Roberts cross operator. The 2ⁿ-bit inputs to our stochastic Roberts operator are stochastic numbers. c Circuit design of a n-bit subtractor and adder in (b). Relation of required d clock cycles and e energy consumption with respect to the bit length of the binary numbers and stochastic numbers. f Energy consumption ratio in (e). When the length of the stochastic numbers is within 2048 bits, the energy consumption of the stochastic Roberts cross operator is lower. All comparisons are conducted at an input encoding frequency of 100 kHz.