Invention Grant
- Patent Title: Charge-scaling multiplier circuit with dual scaled capacitor sets
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Application No.: US16162437Application Date: 2018-10-17
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Publication No.: US10671348B2Publication Date: 2020-06-02
- Inventor: David Paulsen , Phil Paone , George Paulik , John E. Sheets, II , Karl Erickson
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Nathan M. Rau
- Main IPC: G06F7/487
- IPC: G06F7/487 ; H03M1/46

Abstract:
A multiplier circuit can be fabricated within an integrated circuit and can draw a product output node to a voltage proportional to a product of first and second binary numbers received at two sets of inputs. The multiplier circuit includes a first set of scaled capacitors connected to an output of a multiplexor and to a local product output node. Each multiplexor is connected to a second set of scaled capacitors configured to generate an analog voltage in proportion to the value of the first binary number. Each scaled capacitor of first set of scaled capacitors has a capacitance proportional to a significance of a respective bit of the second binary number. The multiplier circuit includes a reference capacitor connected to ground and the product output node, and a reset circuit configured to draw, in response to a RESET signal, the product output node to ground.
Public/Granted literature
- US20200125328A1 CHARGE-SCALING MULTIPLIER CIRCUIT WITH DUAL SCALED CAPACITOR SETS Public/Granted day:2020-04-23
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