Multiplier and arithmetic unit

Details Multiplier and arithmetic unit Multiplier and arithmetic unit

2007-02-23

2011-10-18

Ngo, Chuong D (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S625000, C713S324000

Reexamination Certificate

active

08041758

ABSTRACT:
A multiplier has a multiplication array in which partial products are generated by performing multiplication between a multiplier and a multiplicand, and a partial product control circuit which generates an enable signal for activating an effective region in the multiplication array corresponding to effective figures of the multiplier and the multiplicand. The effective figures depend on the format of the multiplier and the multiplicand. The partial product control circuit controls the status of the enable signal according to a multiplication command designating the format. The multiplication array is constituted by a dynamic circuit. The dynamic circuit in an initial stage of the multiplication array has a switch which is turned on/off by the enable signal. When the enable signal is ineffective, the switch is turned off and a discharging operation in the dynamic circuit is stopped.

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