A wideband auxiliary receiver embeds a band-reject N-path filter in the low-noise amplifier to improve the compression point. The receiver has high input impedance and it can be placed at the transmitter output without loading effects. Implemented in a 28nm CMOS technology it occupies 0.12mm2 active area and it can withstand up to +4 dBm QPSK modulated 20 MHz signal with less than 1-dB noise degradation at 50 MHz offset, achieving an equivalent -171 dBc/Hz noise-to-carrier ratio at 1 GHz. Operation was experimentally verified between 0.7 and 2 GHz. The signal path draws 9 mA from a 1.8 V supply and the clock generation circuits draw 16 mA from a 1.2V supply at 1 GHz.
A 0.7–2 GHz auxiliary receiver with enhanced compression for SAW-less FDD
D. Montanari;D. Manstretta;R. Castello
2017-01-01
Abstract
A wideband auxiliary receiver embeds a band-reject N-path filter in the low-noise amplifier to improve the compression point. The receiver has high input impedance and it can be placed at the transmitter output without loading effects. Implemented in a 28nm CMOS technology it occupies 0.12mm2 active area and it can withstand up to +4 dBm QPSK modulated 20 MHz signal with less than 1-dB noise degradation at 50 MHz offset, achieving an equivalent -171 dBc/Hz noise-to-carrier ratio at 1 GHz. Operation was experimentally verified between 0.7 and 2 GHz. The signal path draws 9 mA from a 1.8 V supply and the clock generation circuits draw 16 mA from a 1.2V supply at 1 GHz.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
