Current-mode analog multiply-accumulate circuits for artificial intelligence
OwnerAli Tasdighi Farinventor
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Abstract
Analog multipliers can perform signal processing with approximate precision asynchronously (clock free) and with low power consumptions, which can be advantageous including in emerging mobile and portable artificial intelligence (AI) and machine learning (ML) applications near or at the edge and or near sensors. Based on low cost, mainstream, and purely digital Complementary-Metal-Oxide-Semiconductor (CMOS) manufacturing process, the present invention discloses embodiments of current-mode analog multipliers that can be utilized in multiply-accumulate (MAC) signal processing in end-application that require low cost, low power consumption, (clock free) and asynchronous operations.
Claims7
A scalar multiplication (siMULT) method in an integrated circuit, the siMULT method comprising:
- arranging a logarithmic relationship between two voltage ports and two current ports of a first block (B);
- supplying a reference current (Ir) to a first current port and a y-current (Iy) to a second current port of the first B;
- supplying a plurality of x-currents (Ix) respectively to a first current port of each of a plurality of successive Bs;
- coupling a first voltage port of each of a plurality of Bs to a first voltage port of the first B;
- coupling a second voltage port of each of the plurality of successive Bs to a second voltage port of the first B;
- and
- generating a plurality of z-currents (Iz) respectively from a second current port of each B of the plurality of successive Bs, each z-current substantially equal to the product of each respective x-current multiplied by the Iy and divided by the Ir.
Dependencies are inferred from the claim text.