Divide-by-2 Injection-Locked Frequency Divider Using Distributed Spiral Resonator 2:1 Distributed Spiral Resonator Injection-Locked Frequency Divider

This paper investigates the locking range property of a divide-by-2 RLC cross-coupled injection-locked frequency divider (ILFD). The ILFD uses a RLC resonator and it is originally targeting for having two overlapped locking ranges at 0 dBm injection power. At the power consumption 4.57 mW and at the incident power of 0 dBm, the locking range of this NFET ILFD is 7.94 GHz, from the injection frequency 2.2 GHz to 10.14 GHz. At low injection power, the ILFD can have two or three non-overlapped locking ranges, indicating that the on-chip spiral inductor shows the effect of distributed capacitance and the ILFD uses a distributed spiral resonator.