An injection-locked oscillator standard cell

The new injection-locked oscillator (ILO) standard cell consists of a differential comparator and even stages of an inverter chain. The ILO has a very simple design and is highly suitable for standard cell applications. The new ILO can be used as a stand alone voltage control oscillator (VCO) or as a building block of a digital phase lock loop. Applications of this circuit include VCO, clock recovery, and clock synthesizer. The characteristics as well as simulation and testing results of the new ILO are presented.