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A fully integrated transmitter architecture operating in the charge-domain with incremental signaling is presented. The architecture provides improved out-of-band noise performance, thanks to an intrinsic low-pass noise filtering capability, reduced quantization noise scaled by capacitance ratios, and sinc 2 alias attenuation due to a quasi-linear reconstruction interpolation. With a respective unit...
This paper presents an ultra low power merged LNA and Mixer design for MICS (Medical Implant Communication Services) applications. A capacitor cross-coupled common gate LNA is implemented for an easy input matching and reasonable noise performance. The mixer operates in weak inversion, which significantly reduces power consumption and relaxes the voltage headroom without sacrificing the LNA performance...
This paper presents a low power wideband receiver front-end implemented in 0.18 um CMOS technology for LTE application. The front-end includes a low-noise amplifier and a quadrature passive current commutating mixer. The inductive peaking LNA is designed using common gate topology for wideband matching with low power consumption. A noise cancellation technique is adopted for the LNA to achieve NF...
Low-complexity, low power UWB radios are required for low data rate short-range applications. FM-UWB is a constant-envelope UWB communication system using double FM: digital FSK followed by high modulation index analog FM to create a constant-envelope signal. The system is intended for low data rate (<; 250 kbps), short-range (<; 10 m) personal area network (PAN) systems. Due to its simple architecture...
We have developed a low-power, fully integrated receiver for 24-GHz ISM band wireless communication using a Rich-Transformer Direct-Stacked/Coupled (RT-DSC) technique. This technique makes it possible to reduce supply voltage and current without any performance degradation. The 24-GHz receiver circuit was fabricated using 0.18-μm SiGe BiCMOS technology. Receiver gain of 30 dB and noise figure (NF)...
We have developed a wearable, battery-free tag that monitors heart sounds. The tag powers up by harvesting ambient RF energy, and contains a low-power integrated circuit, an antenna and up to four microphones. The chip, which consumes only 1.0 uW of power, generates digital events when the outputs of any of the microphones exceeds a programmable threshold voltage, combines such events together by...
This paper presents the designed and implemented RF front-end to reduce the flicker noise and power consumption in TSMC 0.18 mum process. The proposed RF front-end is composed of folded mixer and differential low noise amplifier (LNA). To minimize flicker noise, the proposed RF front-end is designed by using PMOS devices in switching stage of mixers with an resonating inductor. For low power consumption,...
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