Four-quadrant three-input multiplier

Details Four-quadrant three-input multiplier Four-quadrant three-input multiplier

1995-09-15

1997-02-11

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327100, 327355, 327359, 327113, 327119, 327361, 455326, 455333, G06G 716

Patent

active

056025041

ABSTRACT:
A four-quadrant three-input multiplier is disclosed. The three-input multiplier, which finds the product of a first input signal, a second input signal, and a third input signal, includes four differential transconductance amplifiers and two loads. Transistors in the differential pair of each differential transconductance amplifier are operated in the subthreshold region. Four linear-combination signals are individually fed into one input terminal of the four differential transconductance amplifiers. A linear-combination circuit configuration is also disclosed and can be used to generate the required linear-combination signals.

REFERENCES:
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4586155 (1986-04-01), Gilbert
patent: 5151624 (1992-09-01), Stegherr et al.
"Modular Multiplication Without Trial Division" by P. L. Montgomery plublished in the journal Mathematics of Computation, vol. 44, No. 170 Apr. 1985, pp. 519 to 521.

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