A 380µW Rx, 2.6mW Tx 433MHz FSK transceiver with a 102dB link budget and bit-level duty cycling

Abstract

This paper presents a low-power, long-range 433MHz transceiver designed for 2-FSK modulation at 1kbps in 8 different physical channels capable of communicating with a Texas Instruments CC1101. Designed in a 130nm CMOS process with an area of 1.1mm2, the transmitter's output power is 0dBm and the receiver has a sensitivity of -102dBm producing a link budget >100dB and a theoretical range >5km assuming 1/d2 path loss. Low transmitter power is achieved using a 0.5V Class-E PA and low receiver power is achieved by implementing a digitally-assisted demodulator with further power reduction achieved through bit-level duty cycling with an off power of 110nW.