In-memory multiply and accumulate with global charge-sharing

US10748603B2 · kind B2 · utility

Assignee

• Intel Corporation · US

Inventors

• Huseyin Ekin Sumbul · Portland, US
• Gregory K. Chen · Ann Arbor, US
• Raghavan Kumar · Hillsboro, US
• Phil Knag · Portland, US
• Abhishek A. Sharma · Hillsboro, US
• Sasikanth Manipatruni · Ithaca, US
• Amrita Mathuriya · Portland, US
• Ram Krishnamurthy · Portland, US
• Ian A. Young · Portland, US

Key dates

• Filing date: Sep 28, 2018
• Grant date: Aug 18, 2020
• Expiry date: Oct 30, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G11C2207/005
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A memory circuit has compute-in-memory circuitry that enables a multiply-accumulate (MAC) operation based on shared charge. Row access circuitry drives multiple rows of a memory array to multiply a first data word with a second data word stored in the memory array. The row access circuitry drives the multiple rows based on the bit pattern of the first data word. Column access circuitry drives a column of the memory array when the rows are driven. Accessed rows discharge the column line in an accumulative fashion. Sensing circuitry can sense voltage on the column line. A processor in the memory circuit computes a MAC value based on the voltage sensed on the column.