Designing Bi-directional Counters Using Quantum-dot Cellular Automata Nanotechnology

One of the major problems in designing highly compact integrated circuits is power consumption circuits. Therefore, several technologies have been introduced to overcome facing MOSFET technology. these Quantum-Dot Cellular Atomata (QCA), which has advantages. In this paper, we focus on computational logic gates based T-Latch circuit. T-latch basis many circuit arithmetic unit (ALU). The proposed structure for a lower number cells, occupied area and than existing methods. T-Latch, compared previous best designs, 6.45% cross section 44.49% were reduced. Also first time with reset terminal both set terminals designed. addition, using T-latch, 3-bit bidirectional up-down counter consists 204 quantum 0.26 µm2 cross-sectional area, delay 5.25 clock cycles, three-bit pin made. are designed QCA All design simulation results done QCADesigner software.