Compact RF CMOS 4bit Digitally Controlled Oscillator Design of a reconfigurable compact digitally controlled oscillator (DCO is proposed in this paper. It uses a gyratorC basedtopology tunable active inductor (TAI) that achieves coarse frequency tuning due to a digitally controlled current source and a variable capacitance bank. The DCO, implemented in 130 nm CMOS process, achieves a frequency tuning from 1.8 to 2.6 GHz when varying the digital control word. It occupies an area of only  57 boldsymbolmu mathbfmtimes 53 boldsymbolmu mathbfm . The power consumption is changing from 2.6 mW to 5.3 mW at a supply voltage of 1.1 V, and the phase noise from xe2x88x9286 to xe2x88x9282 dBcHz 1 MHz offset. The proposed DCO shows a compact size, wide tuning and lowpower consumption making it suitable to reconfigurable lowcost multiband radiofrequency (RF) applications.

A 0.91.82.4GHzreconfigurable LNA with Inductor and Capacitor Tuning for IoT Application in 65nm CMOS This paper presents a 0.91.82.4GHzreconfigurable low noise amplifier (LNA) for IoT applications. An input transformer consisting of a primary coil and two secondary coils is proposed in the LNA to ensure impedance matching in three bands. Mutual inductance enhancement scheme is also proposed to boost the inductance Q value and improve circuit performance without power overhead. The proposed LNA is designed and simulated in TSMC 65nm CMOS with an area of 1.32mm2. The postlayout simulations show that the presented LNA achieves 14.51617.5dB voltage gain and 2.82.52.0dB noise figure at 0.91.82.4GHz. The S11 and the input P1dB are xe2x88x928.8119.6dB and xe2x88x92111719dBm at 0.91.82.4GHz respectively. The LNA power consumption is 4mW from a 1.2V power supply.