Self-tuned SAW-less GNSS receiver front end with blocker filtering and gain-irrelevant DC offset cancellation
- « Previous Article
- Table of contents
- Next Article »
A self-tuned surface acoustic wave (SAW)-less global navigation satellite system (GNSS) receiver is proposed. In the self-tuning mode, the radio-frequency amplifier (RFA) is configured as an oscillator and the receiver chain is reused to realise a simple self-calibration. In the normal operation, the RFA works as a Q-enhanced radio-frequency filter to remove the out-of-band blockers. A gain-irrelevant DC offset cancellation is also presented. This GNSS receiver achieves 4.8 dB noise figure and a rejection of 25.8 and 31.8 dB for DCS (1710 MHz) and PCS (1850 MHz) blockers, while consuming <5 mA current from a 1.7 V supply.
