AR-CIM: A 460.22TOPS/W SRAM-based Analog Reconfigurable Computing-in-Memory Macro with 1/2/4/8-Bit Variable Precision

This work presents an SRAM-based analog reconfigurable computing-in-memory macro with 409.6-GOPS throughput and 460.22-TOPS/W energy efficiency. The proposed reconfigurable macro supports 1 / 2 / 4 / 8 ~b inputs and 1 / 2 / 4 / 8 ~b signed weights while maintaining 100% memory utilization. Furthermore, we propose (i) a dual-domain DAC to achieve high-precision input with low area overhead and (ii) an input-sense-and-skip SAR ADC, which reduces the average power overhead by 54% compared with conventional SAR ADC.