Design of low–power 4-bit Flash ADC using Multiplexer based encoder in 90nm CMOS process

Shylu Sam, Sam Paul, Diana Jeba Jingle, Mano Paul, Judith Samuel, Reshma J, Sarah Sudeepa, G Evangeline


This work describes a 4-bit Flash ADC with low power consumption. The performance metrics of a Flash ADC depend on the kind of comparator and encoder used. Hence open-loop comparator and mux-based encoder are used to obtain improved performance. Simulation results shows that the simulated  design consumes 0.265mW of power in 90nm CMOS technology using cadence-virtuoso software. The circuit operates with an operating frequency of 100MHz  and  supply  voltage of 1V.

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