Patent ID: 10732293

Abstract:
A quadrature fully integrated tri-band GPS receiver implemented in 65 nm CMOS. The analog front-end (AFE) is specifically designed for a miniaturized low-power GPS logger that leverages heavy duty-cycling. The main contribution of the RF front-end is comprised of two main signal paths which support the single-band only mode and the tri-band mode (L1, L2, L5). In the tri-band mode, the AFE is able to fold three GPS signals into a single low intermediate frequency channel in part due to the orthogonality of the pseudo-ransom codes. In active mode, the radio draws 12.1 mW in the single-band (L1) mode with a LNA and an active mixer, and 8.2 mW in the tri-band mode with a passive front-end, from a 1.2 V supply, and with a startup time of 20 us.