An ultra-low-power 868/915 MHz RF transceiver for wireless sensor network applications

Wake-up Receiver Based Ultra-Low-Power WBAN

“…It is clear that the reported FSK receivers in general consume more power than the reported OOK systems. This is mainly caused by the frequency reference, for example an on-chip Phase Locked Loop (PLL) [9], needed by the FSK receivers. However in general, the reported FSK receivers have a higher bit rate than the OOK receivers.…”

“…Other low-power receivers use FSK modulation [9,[12][13][14][15], which is slightly more interferer-robust than OOK modulation [27]. Because the frequency reference needs to be stable, most FSK receivers use power consuming PLLs [9].…”

“…Because the frequency reference needs to be stable, most FSK receivers use power consuming PLLs [9]. Receivers using injection-locking [14] have a lower power consumption, but are more sensitive to blockers.…”

“…The power consumption of the presented oscillator including LO buffers is only 77µW at 900MHz, which is much lower than the oscillators presented in literature. However, the linearity and noise figure of [9,13,18] are better, showing a trade-off between power consumption and linearity. Especially [9] has a much higher linearity at the cost of a high power consumption, which makes the receiver better suited for high performance applications.…”

“…However, the linearity and noise figure of [9,13,18] are better, showing a trade-off between power consumption and linearity. Especially [9] has a much higher linearity at the cost of a high power consumption, which makes the receiver better suited for high performance applications. Additionally, it is clear that the low supply voltage of 0.25V used in [16] leads to a low 1dB compression point and low IIP3.…”