Low power injection locked oscillators for MICS standard

摘要

This paper presents two low power injection locked oscillators (ILOs): direct ILO and tail ILO, implemented in a standard 0.13-µm CMOS process. Both ILOs are based on current-reuse differential LC voltage controlled oscillator (VCO) with different injection locations: direct injection for direct ILO and current source injection for tail ILO. The current-reuse topology enables lower power dissipation of both ILOs. It is about 1.2mW (without output buffers) under supply voltage of 1.2-V. When the injected input signal power is 0dBm, direct ILO and tail ILO feature a wide locking range of 320MHz and 220MHz, respectively. The locking range covers the Medical Implantable Communications Service (MICS) band (402MHz–405MHz). Each of the proposed ILOs can be used as the driver stage of power amplifier in transmitter systems conforming to the MICS standard.