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We describe a low-power voltage amplifier that is suitable for RF (radio frequency) receivers in a WSN (wireless sensor network). Since a sensor node has a strict energy budget in a WSN, it often enters itself into a standby mode when no communication is required, and hence a standby power have to be suppressed as well as an active power in order to maximize a lifetime of a WSN. For this sake, it...
Ultra wideband (UWB) radio technology has many advantages: i.e., ultra wide 7.5 GHz spectrum bandwidth, extremely high throughput, very low power, etc. This paper presents a single-chip low-power 3.1-10.6 GHz low-noise amplifier (LNA) designed for pulse-based full-band UWB transceivers, which features an improved shunt-series feedback topology to achieve desirable ultra broadband gain and noise performance...
A low-power switched gain low noise amplifier (LNA) is presented for ultrawideband (UWB) wireless applications. The proposed topology is co-designed with transmit/receive (T/R) switch for mode 1 OFDM applications and the integrated circuit is implemented in a 0.13 mum CMOS technology. The measurement results show a gain-switch of 10 dB where s21 in the frequency band of interest is 17.4-19.2 dB at...
A folded RF front-end with merged LNA and mixer is designed in 0.25 mum CMOS process for low power applications. The designed low power RF front-end uses the folded and current reuse techniques. It consumes 13.8 mW from 1.7 V supply voltage, while 5.2 dB NF and 25.7 dB conversion gain are achieved. By using PMOS in the switching stage of the folded mixer, low flicker noise of 7 dB at 10 kHz is also...
This paper describes the new switching technique for the better performance mixer by utilizing the body terminal. The same phase LO signal is delivered to both the gate and body terminal simultaneously, leading to a closer ideal switching operation. The theoretical study of this operation is presented. Thanks to the body effect, the final circuit provides a conversion gain of 18 dB with 0 dBm LO power...
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