A 0.6 V, 3.3 nW, Adjustable Gaussian Circuit for Tunable Kernel Functions

This work introduces a compact, ultra-low power (3.3nW) Gaussian circuit architecture for Kernel function emulation. It has independent and electronically adjustable mean value, amplitude and deviation, operating with 0.6V power supply. It consists of a current correlator and a bulk-controlled differential block, with all transistors operating in sub-threshold. Proper operation, accuracy and sensitivity are confirmed via post-layout simulation results and theoretical analysis. It was implemented in TSMC 90nm CMOS process and simulated using the Cadence IC Suite.