High speed area efficient 5-bit hybrid Flash ADC using spin devices and CMOS

Abstract

This paper uses current induced domain wall motion in a magnetic stripe and pre-charge sense amplifiers (PCSA) to design a high speed comparator of a magnetic flash ADC. Current-induced domain-wall (DW) motion is a prominent switching mechanism promising, high-density and high-speed circuits. Domain-wall motion in a magnetic stripe based magnetic flash ADC (Analog to Digital Converter) is area efficient and faster compared to other ADCs. Our proposed 5-bit Flash ADC can operate at 500MS/s with power consumption of 10.5mW. The power consumption can be further reduced to 5.06mW by choosing a smaller step size of 10mV. By using MTJ and domain wall motion in a magnetic stripe with PCSA, SPICE compatible Verilog-A model and CMOS 45nm design kit, its performance such as power and delay have been simulated and compared with other ADCs.