This paper provides a low power low noise differential amplifier designed for Wireless sensornetwork (WSN) in TSMC 0.18 μm RF CMOS process. It should work well centered at 2.44 GHz frequency and the forward gain is ...
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ISBN:
(纸本)9781612843063
This paper provides a low power low noise differential amplifier designed for Wireless sensornetwork (WSN) in TSMC 0.18 μm RF CMOS process. It should work well centered at 2.44 GHz frequency and the forward gain is variable with highest gain at 12 dB to lowest gain at -2 dB by 2 dB steps. In this paper, a two-stage cascade common-gate (CG) topology and two external inductor choke coils are used to achieve input matching of LNA under low power consumption, and a differential inductor has been designed as the load to achieve reasonable gain and reduce chip area simultaneously. It has been simulated and verified by means of Cadence Spectre. The NF (Noise Figure) at high gain (12.5 dB) is 3.9 dB, the input referenced 1dB compression point (IP1dB) is about -1 dBm at lowest gain mode. The LNA consumes about 1.5 mA current from 1.8 V power supply.
A 4.8GHz LC voltage controlled oscillator (VCO) for WSN Applications is designed based on TSMC 0.18 μm RF CMOS process. The VCO adopts complementary differential negative resistance structure with switch resistor bia...
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ISBN:
(纸本)9781612843070
A 4.8GHz LC voltage controlled oscillator (VCO) for WSN Applications is designed based on TSMC 0.18 μm RF CMOS process. The VCO adopts complementary differential negative resistance structure with switch resistor biasing which achieves good phase noise performance and realizing low power consumption. The 3-bit switch capacitor array provides wide tuning range and the 6-bit switch resistors array provides varied biasing current by auto current calibration (ACC) circuit. With a 1.8V supply voltage, the post-simulated result achieves 27.7% tuning range that can compensate the frequency deviation due to process corners. The post simulated phase noise is -119dBc/Hz@1MHz at frequency of 2.44GHz. The operating current of the VCO core is from 0.4mA to 3.3mA. Finally, the chip size of the VCO core is 0.3mm 2 and the whole chip size is 0.8×1.2mm 2 with testing buffer and pads.
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