A 1.05-V 62-MHz with 0.12-nW standby power SOTB-65 nm chip of 32-point DCT based on adaptive CORDIC

Abstract

In this paper, a Silicon On Thin Buried-oxide (SOTB) implementation of a 32-point Discrete Cosine Transform (DCT) is presented. The architecture is based on the fixed-rotation adaptive COordinate Rotation DIgital Computer (CORDIC) algorithm. The SOTB-65 nm process was chosen due to the profound advantages of low-power and high-performance. The core layout contained about 47.2 K gate-count and had the size of about 183 K-µm². The measurement results showed that the highest operating frequency of 62-MHz was achieved at the 1.05-V power supply and consumed about 737-µW and 11.89-pJ/cycle. In the standby mode, the least power consumption of 0.12-nW was achieved at the 0.4-V power supply when the clock-gating technique and −2.5-V reverse back-gate biassing were applied.