DCT-RAM: A Driver-Free Process-In-Memory 8T SRAM Macro with Multi-Bit Charge-Domain Computation and Time-Domain Quantization

Abstract

This paper presents DCT-RAM, a driver-free PIM macro that performs multi-bit charge-domain MAC and time-domain quantization with high computing accuracy and parallelism. It features: (1) a driver-free charge-domain computing (DCC) scheme that performs accurate multi-bit MAC without analog buffers; (2) a compact 8T SRAM cell complementing the DCC module, supporting parallel access of 576 rows; and (3) column-parallel compact 8-bit time-domain ADCs that are self-referenced, highly digital, and support resolution reconfiguration and input amplification.

Zhiyu Chen

PhD 2023, now at Apple

Zhanghao Yu

PhD 2023, now at Intel

Kaiyuan Yang

Associate Professor of ECE