Invention Grant
- Patent Title: Differential analog multiplier-accumulator
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Application No.: US17139945Application Date: 2020-12-31
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Publication No.: US11977936B2Publication Date: 2024-05-07
- Inventor: Martin Kraemer , Ryan Boesch , Wei Xiong
- Applicant: Ceremorphic, Inc.
- Applicant Address: US CA San Jose
- Assignee: Ceremorphic, Inc.
- Current Assignee: Ceremorphic, Inc.
- Current Assignee Address: US CA San Jose
- Agency: File-EE-Patents.com
- Agent Jay A. Chesavage
- Main IPC: G06F7/544
- IPC: G06F7/544 ; G06G7/16

Abstract:
A differential multiplier-accumulator accepts A and B digital inputs and generates a dot product P by applying the bits of the A input and the bits of the B inputs to respective positive and negative unit elements comprised of groups of AND gates coupled to charge transfer lines through a capacitor Cu. Each positive and negative unit element receives one bit of the B input applied to all of the AND gates of the unit element, and each positive and negative unit element having the bits of A applied to each associated AND gate input of each unit element. The AND gates are coupled to charge transfer lines through a capacitor Cu, and the charge transfer lines couple to binary weighted charge summing capacitors and to an analog to digital converter to generate a digital output product. The charge transfer lines may span multiple unit elements.
Public/Granted literature
- US20220209788A1 Differential Analog Multiplier-Accumulator Public/Granted day:2022-06-30
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