A Low-Power CMOS Transceiver in 130nm for Wireless Sensor Network Applications

摘要

RF modules are responsible for major power consumptions in wireless sensor network nodes. A transceiver is the core of RF modules. A low-power RF transceiver in 130nm at 1 v is presented for WSN applications. Bias currents of the VCO and frequency multiplier are limited to 0.07 and 0.1mA, respectively. The LNA and mixers are designed with the current reused technique and an additional cascode transistor is also used in the LNA. Conversion gain of this transceiver is 25dB. The P1dB is -22.5dB. The noise figure (NF) at 50MHz as IF frequency is about 4.6dB with a 0.4 mW DC power. In order to have higher efficiency and lower power in a transmitter, the power oscillator class E is used with the combination of injection locked and current reused. The PAE of a transmitter is about 50% with 10 dBm output power. The transmitter VCO and preamplifier power consumption are 112 and 798 uW, respectively. A switch antenna is implemented on a single chip in this transceiver which has a better performance as compared to previous works.