A reconfigurable 1:3 power divider is presented using quarter-wave long coupled lines and switches. The proposed power divider allows dual operating mode, or a 1:3 power divider and 1:0 power transmission mode, by turning the switches on and off. To make a high power-division ratio of three realisable and improve the bandwidth, a microstrip-slot structure is adopted on a thick substrate with high dielectric constant. The measurement of the proposed power divider shows good return and insertion loss performance in both modes.

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A novel FIR driver that can be applied to a low power mode in the (Low Power Double Data Rate 4) LPDDR4 standard has been developed. The prototype transmitter architecture is implemented in 45 nm CMOS process and occupies 0.009 mm 2 area. The preemphasis tap weighting improves the eye opening by 27.9% vertically and 27% horizontally, respectively, and the transmitter consumes only 2.25 mW at 3.2 Gb/s.