A 150GHz injection-locked frequency divider with 19.8% locking range based on adjustable inductor tuning method in 65-nm CMOS
A newly structured 150GHz divider-by-2 injection-locked frequency (ILFD) is designed in a 65-nm CMOS technology. This ILFD uses a new adjustable inductor tuning technique and time-interleaved dual-injection method to improve the frequency division range. A 1-bit binary-weighted switch-capacitor is also used to widen the locking range. From the post-layout simulation result we can see that four self-resonance frequencies are 70.5GHz, 73.5GHz, 76.5GHz, and 79.5GHz, respectively. The locking range is from 135.2GHz to 165GHz with less than 0dBm input power, implying a locking range as wide as 19.8%. The ILFD consumes 4.7mW from a supply of 1.2V excluding output buffers.