PROJECT TITLE :

A Fully Integrated Wideband FM Transceiver for Low Data Rate Autonomous Systems

ABSTRACT:

A frequency-agile FM-UWB transceiver (Tx/Rx) with full on-chip calibration aimed toward low information rate autonomous wireless sensing applications is described. The subcarrier VCO, three-part CCO, and frequency-tripling PA within the transmit path turn out a wideband, double-FM output at 10.one dBm-pk (FCC compliant). A tunable LNA, envelope detector, limiter, and FSK demodulator comprise the receiver. Digitally programmable matching networks at the PA output and LNA input facilitate independent tuning of Tx and Rx across the 3–5 GHz band. An on-chip SAR-FLL controlling 5 DACs (3 I-DACs and a pair of C-DACs) performs a full Tx/Rx calibration in but two ms. Designed for continuous operation at a hundred kb/s, measured Rx sensitivity is eighty.5 dBm (10 BER), and average Tx/Rx energy efficiency is 6 nJ/bit. Total dissipation for the zero.nine mm IC implemented in 90 nm RF-CMOS is 630 µW in Tx and 580 µW in Rx mode from a one V offer.