Processing math: 100%
A 362-TOPS/W Mixed-Signal MAC Macro With Sampling-Weight-Nonlinearity Cancellation and Dynamic-Amplified Accumulation | IEEE Journals & Magazine | IEEE Xplore

A 362-TOPS/W Mixed-Signal MAC Macro With Sampling-Weight-Nonlinearity Cancellation and Dynamic-Amplified Accumulation


Abstract:

This work presents a high energy-efficiency mixed-signal multiply-and-accumulate (MAC) macro in charge-domain for machine learning (ML) systems. It involves crucial featu...Show More

Abstract:

This work presents a high energy-efficiency mixed-signal multiply-and-accumulate (MAC) macro in charge-domain for machine learning (ML) systems. It involves crucial features aimed at enhancing energy efficiency, throughput, and area efficiency, namely: 1) a parallel-serial (ParSer) scheme to augment the throughput by parallel input channels and reduce the power via serial analog accumulation rather than digital summation; 2) the weight-independent parallel digital-to-analog converter (DAC) sampling (WIPDS) to cancel weight nonlinearity during sampling and allow for resource-efficient DAC, significantly saving power and area; 3) a high energy-efficiency dynamic amplifier (DA) introduced to improve drivability and counteract attenuation of the serial accumulation, thereby attaining the desired accuracy with relaxed the afterward analog-to-digital converter (ADC) resolution and consequently reducing power consumption; 4) an optimized SAR ADC to reach higher energy efficiency. Fabricated in 28-nm CMOS technology, the prototype exhibits a peak energy and area efficiency of 362 TOPS/W and 3.23 TOPS/mm ^{2} , respectively.
Page(s): 1 - 13
Date of Publication: 06 January 2025

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Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
UM Hetao IC Research Institute, Shenzhen, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
UM Hetao IC Research Institute, Shenzhen, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China

Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
UM Hetao IC Research Institute, Shenzhen, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
UM Hetao IC Research Institute, Shenzhen, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, China
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
Department of ECE, State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, and the Faculty of Science and Technology, University of Macau, Macau, China
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