A 5Gb/s F-band ASK transmitter in 45nm LP CMOS

This paper presents an F-band direct digital ASK modulation transmitter. A high speed bias current modulator and a large bandwidth power amplifier are key building blocks in this system. The digital PRBS signal is generated by an on chip high speed 9-bit LFSR. A transmitted data rate of 5Gb/s is achieved and the measured peak output power is 6dBm at 110GHz. The peak LO to RF gain is 16dB. Total chip area is 0.5mm(2), the active RF area occupies 0.1 mm(2) and the digital baseband measures 0.01 mm(2).