Presentation on theme: "A NEW 5-TRANSISTOR XOR-XNOR CIRCUIT BASED ON THE PASS TRANSISTOR LOGIC"— Presentation transcript:
1A NEW 5-TRANSISTOR XOR-XNOR CIRCUIT BASED ON THE PASS TRANSISTOR LOGIC Vimal Kant Pandey
2IntroductionXOR-XNOR circuits are the basic building block of many arithmetic and encryption circuits e.g. adders, multipliers, Comparators, Parity Checkers etc.Careful design and analysis is required for XOR-XNOR circuits to obtained –full output voltage swing, lesser power consumption and delay in the critical path.We proposed a new XOR-XNOR circuit and compare it’s performance with different designs.The designs are simulated using TSPICE in the voltage range of 0.6V to 1.2V using 90nm CMOS technology.
3Previous WorkIn the past two decades, a number of circuit techniques have been reported with a view to improve the circuit performance of XOR-XNOR gates -.Shiv et al. , the XOR–XNOR circuit is design based on pass-transistor logic (PTL) and CMOS inverter (Fig1 ) haslower PDP,less power dissipation andfaster compared to design in with a low supply voltage.However both of the circuits give a poor signal output voltage in certain input combination.Figure1: XOR-XNOR gate using transistors in 
4a full output voltage swing better driving capability D. Radhakrishnan et al. , the XOR and XNOR circuit based on Pass Transistor Logic (PTL) using 6 transistors is reported as shown in Figure 2. It hasa full output voltage swingbetter driving capabilityElgamel et al.  , has designed improved version of  in Fig. 3 hashas better power-delay product andhigher noise immunity .Figure 3: XOR-XNOR gate using 8 transistors in Figure 2: XOR-XNOR gate using 6 transistors in 
5Proposed DesignThe proposed design of XOR-XNOR gate and it’s operation is shown below:ABM1M2M3M4M5XORXNORONOFF1
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