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A fully-integrated Sub-GHz low-power transceiver (TRX) for 802.11ah applications is presented. The receiver takes both advantages of Low-IF/Zero-IF architectures while supporting 1/2/8MHz reconfigurable signal bandwidth. A Σ-Δ fractional-N PLL with Class-C VCO is employed to provide the LOs. In order to enhance the power amplifier (PA) back-off efficiency, a Peak-to-Average-Power-Ratio (PAPR) tolerant...
This paper presents a frequency modulated ultra-wideband (FM-UWB) transceiver system with RF submodules gated by a data-driven control signal. With the control signal, intermittent operation of key building blocks such as a VCO in the transmitter and a wideband FM demodulator in the receiver is realized. To enable an effective dynamic power control, the transmitter generates higher subcarrier frequency...
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