A new injector topology is adopted for the design of a 60-GHz CMOS divide-by-5 injection-locked frequency divider (ILFD). The topology is based on a distributed-element harmonic termination by an open-stub structure connected to the floating source end of the differential injection pair. With this topology together with an N-MOS cross-coupled oscillator core, the supply voltage and power consumption of the divider can be greatly reduced. A test circuit is implemented in a 90-nm CMOS process. With the added λ/4 open stub, the simulated frequency locking range of the designed ILFD with the distributed-element harmonic termination scheme has been greatly extended over 70%. The measured power consumption is 3.75 mW at a supply voltage of 0.6 V and the locking range is 4.1 GHz. A good figure of merit (FOM) of 69.4 is achieved.
|Title of host publication||2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Digest of Papers|
|Publication status||Published - 2011|
|Event||2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Baltimore, MD, United States|
Duration: 2011 Jun 5 → 2011 Jun 7
|Other||2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011|
|Period||11-06-05 → 11-06-07|
All Science Journal Classification (ASJC) codes