Abstract
This brief presents a novel CMOS Gaussian frequency-shift keying (GFSK) receiver with an ultralow power consumption, which is based on the injection-locking technique for short-range wireless systems. Additionally, through reducing the oscillation current amplitude of the injection-locked oscillator, the GFSK receiver sensitivity is significantly improved. While comprising a submilliwatt low-noise amplifier, a trifilar transformer splitter, and an injection-locked self-oscillating mixer, the proposed receiver is fabricated using a 90-nm CMOS 1P9M technology. Measurement results indicate a sensitivity of -81 dBm, with a power consumption of 1.8 mW, when a Bluetooth GFSK signal with a data rate of 1 Mb/s is received.
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