Even-Modulus Injection-Locked Frequency Divider Using Transformer based Resonator

Abstract

This article designs an even-modulus injection-locked frequency divider (ILFD) with transformer-coupled resonator, the ILFD was implemented in $a0.18 \mu m3 P6M$ BiCMOS process. Conventional transformer-based ILFDs have focused on the divide-by-2 mode. This article illustrates a wide locking range divide-by4 ILFD based on the transformer-based resonator. At the drain source bias of 0.95 V and at the incident power of 0 dBm, the locking range is 3.9 GHz (32.36%) from 10.1 to 14 GHz at the power consumption of 4.27 mW. The free-running oscillation frequency is 2.78 GHz. The die dimension is $1.006 \times0.925$ mm}2. The proposed ILFD can operate in the divideby-2 mode and has excellent Figure of merit.