DESIGN AND IMPLEMENTATION OF A LOW-POWER MULTIPLE-VALUED CURRENT-MODEINTEGRATED-CIRCUIT WITH CURRENT-SOURCE CONTROL

A new multiple-valued current-mode (MVCM) integrated circuit using a s witched current-source control technique is proposed for a 1.5 V-suppl y high-speed arithmetic circuit with low-power dissipation. The use of a differential logic circuit (DLC) with a pair of dual-rail inputs ma kes the input voltage swing small, which results in a high driving cap ability at a lower supply voltage, while having large static power dis sipation. In the proposed DLC using a switched current control techniq ue, the static power dissipation can be greatly reduced because curren t sources in non-active circuit blocks are turned off. Since the gate of each current source is directly controlled by using a multiphase cl ock whose technique has been already used in dynamic circuit design, n o additional transistors are required for current-source control. As a typical example of arithmetic circuits, a new 1.5 V-supply 54 x 54-bi t multiplier based on a 0.8 mu m standard CMOS technology is also desi gned. Its performance is about 1.3 times faster than that of a binary Fastest multiplier under the normalized power dissipation. A prototype chip is also fabricated to confirm the basic operation of the propose d MVCM integrated circuit.