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This paper describes a WiFi/BT combo SoC with integrated dual-band PAs, LNAs and T/R switches, supporting concurrent receiving for improved throughput by 30% in dense networking environment of 2.4GHz ISM band and wide-range transmitting capability (>20dB) while keeping good output power accuracy and PA power efficiency. The measured 2.4GHz/5GHz WiFi 54Mbps RX sensitivity is −78.2/−78.1dBm and Pout...
This paper describes a dual-band 802.11abgn/ac compliant transceiver in a 4-in-l combo connectivity SoC. It integrates the PAs, LNAs, T/R switches, and the 5GHz Balun. Due to the transmitter architecture and adaptive biasing scheme both are tailored for wide bandwidth, the 5GHz transmitter achieves 18.2dBm average output power for 802.11ac VHT80 MCS9 (Modulation and Coding Scheme 9). Within the 80MHz...
A load-line adjusted 2.4GHz PA is designed to operate in full power (18dBm/150mA) & mid power (7dBm/19mA) in OFDM with ∼130mA saving. To improve network throughput in dense environment with per-packet TX power control, the phase-compensated power detector achieves ±0.6dB accuracy for the entire 5GHz band over 2∶1 VSWR and 16dBm±0.25dB over channel flatness in VHT80MCS9. The chip area is 0.21mm...
A subsampling filter is proposed for a discrete-time receiver (DTR). This filter achieves signal discretisation, filtering and downconversion simultaneously. With the proposed subsampling filtering technique, the subsampling mixer in a conventional DTR is eliminated, which can reduce power, cost and noise. The first 2.4 GHz DTR prototype for Zigbee application is fabricated in a 0.18 μm CMOS process...
This paper presents a dual-path noise-cancelling (DPNC) LNA, which is designed for low power wireless sensor network (WSN) applications and operates at 2.4GHz band. The proposed DPNC LNA can effectively cancel internal circuit noise while consuming less power by gm-boosted technique. The measured voltage gain and NF are 22dB and 3.7dB, respectively. IIP3 is +8dBm and consumes 1.2mW with a 1.0V single...
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