Imec and Vrije Universiteit Brussel (VUB) have demonstrated a 0.22mm2 CMOS resistive charge-based direct launch digital transmitter with -159dBc/Hz out-of-band noise. The achievement paves the way to small form-factor SAW-less transmitter implementations enabling advanced wireless communication systems including all the cellular standards 3G, 4G and future 5G.   Analog transmitters are less suitable for integration in advanced CMOS nodes. Digital transmitters are more compact and more robust t...