A low-power dual-modulus injection-locked frequency divider for medical implants

In this paper, we propose a low-power dual-modulus injection-locked frequency divider (ILFD) based on a relaxation oscillator, which is shown to be suitable for injection-locked frequency divider design. By varying the center frequency based on the modulus control bit, the divider can achieve different division ratios. For validation, two dual-modulus ILFDs which can achieve different division ratios such 2/3, 3/4, 4/5 are simulated in a 90 nm CMOS process technology with two tuning methods. The divider covers the frequency range of the medical implant communications service (MICS) and the industrial, scientific and medical (ISM) frequency bands for low power applications.