A 0.13µm CMOS 2.5Gb/s FSK demodulator using injection-locked technique

A low-power gigabits FSK demodulator using injection-locked technique is employed for 60 GHz wireless communication systems. Compared with the conventional LC tank discriminator, the injection-locked oscillator provides a stable frequency-to-phase transformation for analog non-coherent FSK demodulation. Fabricated in 0.13-mum CMOS technology, this FSK demodulation only occupies a chip area of 0.5times0.45 mm². The measured data rate and the detecting range of the injection-locked FSK demodulator are 2.5 Gbps and plusmn1 GHz respectively. The demodulation input sensitivity is -16 dBm at BER less than 10^-9 for uncoded 2.5 Gbps 2³¹-1 PRBS data with 1 GHz frequency deviation while consuming 6 mW from a 1.2 V supply.