A low power 20 GHz 1.5 Gb/s CMOS injection-pulling FSK modulator and frequency discriminator for 60GHz links

This paper presents a low power frequency shift keying (FSK) modulator and demodulator (MODEM) that can support over than 1 Gb/s data rate for high-speed multimedia data communications. Compared with open-loop direct modulation of a voltage-controlled oscillator (VCO), the direct injection-pulling of a VCO enables the high speed FSK modulation without suffering frequency drift problem. The FSK discriminator uses injection-locked technique to perform frequency-to-phase transformation with low power consumption. Due to the lack of delay-dependent term in this new transformation, the accurate delay control circuits can be removed. Realized in the 0.13-mum CMOS technology, the FSK MODEM can achieve maximum data rate of 1.5 Gb/s. The power consumption of core modulator and demodulator is 14.4 mW.