A 27mW 2.2dB NF GPS receiver using a capacitive cross-coupled structure in 65nm CMOS

A fully integrated low-IF GPS receiver with minimum external components is implemented in a 65nm CMOS process. It has an integrated LNA and an active complex bandpass filter with a switchable signal bandwidth of 2MHz or 6 MHz to achieve the SNR improvement. To reduce power consumption, the current reusing method and current mode interface technique using a capacitive cross-coupled common-gate structure are applied. The measured noise figure of whole receiver including an external inter-stage SAW filter is 2.2dB. Its current consumption is 15mA at 1.8V supply.