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A mixer-first receiver enhanced with capacitive positive feedback is proposed to obtain a steeper filter roll-off and enhanced linearity, while keeping low noise figure. It covers all sub-6GHz cellular bands and achieves a high IIP3 of +39dBm and blocker 1dB gain compression point of +12dBm for a blocker frequency-offset of 80MHz at fLO=2GHz. The NF ranges from 2.4dB at fLO=1GHz to 5.4dB at fLO=6GHz...
LTE-advanced wireless receivers require high-linearity up-front filtering to prevent corruption of the in-band signals by strong out-of-band (OOB) signals and self-interference from the transmitter. SAW duplexer filters are generally used for this purpose, but supporting the plethora of existing and new bands becomes troublesome with separate filters for each band. In this paper we explore the possibility...
The past decade has seen a tremendous growth in fabless design companies which have been able to offer new products in the communication and electronic application market without bearing the high costs associated with a manufacturing infrastructure. On the other hand, foundries have been able to meet that demand with a large range of Silicon processes — from low cost to high performance devices. This...
A 40nm CMOS transceiver supports 10 bands of HSPA+ and quad-band GSM/EDGE occupying 6.2mm2 of a Modem SoC. The TX supports up to 11Mb/s HSUPA with minimal analog filtering and <35mA battery current DG-09 weighted. Receive diversity with dual cell HSDPA supports up to 42Mb/s downlink. The RX path is inductorless and achieves −111dBm sensitivity using a low power synthesizer with <0.35deg-rms...
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