Design of Active Inductor-Based VCO with Wide Tuning Range for RF Front End

2021 ◽  
Author(s):  
Lakshmi Nediyara Suresh ◽  
Bhaskar Manickam
Keyword(s):  
Tuning Range ◽  
Active Inductor ◽  
Wide Tuning Range ◽  
Front End ◽  
Rf Front End

scholarly journals A Wide Tuning-Range CMOS VCO with a Tunable Active Inductor

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Hsuan-Ling Kao ◽  
Ping-Che Lee ◽  
Hsien-Chin Chiu
Keyword(s):  
Degrees Of Freedom ◽  
Tuning Range ◽  
Frequency Tuning ◽  
Cmos Technology ◽  
Feedback Loops ◽  
Fine Tuning ◽  
Active Inductor ◽  
Frequency Range ◽  
Wide Tuning Range ◽  
Output Frequency

This study describes a wide tuning-range VCO using tunable active inductor (TAI) topology and cross-coupled pair configuration for radio frequency operation. The TAI used two feedback loops to form a cascode circuit to obtain more degrees of freedom for inductance value. The TAI-VCO was fabricated using a 0.18 μm CMOS technology. The coarse frequency tuning is achieved by TAIs while the fine tuning is controlled by varactors. The fabricated circuit provides an output frequency range from 0.6 to 7.2 GHz (169%). The measured phase noise is from −110.38 to −86.01 dBc/Hz at a 1 MHz offset and output power is from −11.11 to −3.89 dBm within the entire frequency range under a 1.8 V power supply.

Wide Tuning Range Varactorless Tunable Active Inductor-Based Voltage Controlled Oscillator for Wireless Applications

2019 ◽  
Vol 28 (14) ◽  
pp. 1950242
Author(s):  
Omar Faruqe ◽  
Md Tawfiq Amin
Keyword(s):  
Tuning Range ◽  
Active Inductor ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Performance Parameters ◽  
Wide Tuning Range ◽  
Silicon Area ◽  
Wireless Applications ◽  
Dc Power ◽  
Tuning Frequency

This paper presents a varactorless tunable active inductor-based voltage controlled oscillator (VCO) in 90[Formula: see text]nm CMOS process. The proposed VCO yields a wide tuning range of 116% with an output frequency of 1.19–4.46[Formula: see text]GHz for the tuning voltage of 0.3–1.5[Formula: see text]V. It consumes a low dc power ranging from 2.44[Formula: see text]mW to 4.79[Formula: see text]mW for the specified tuning range. The variation of phase noise ranges from [Formula: see text][Formula: see text]dBc/Hz to [Formula: see text][Formula: see text]dBc/Hz at 1[Formula: see text]MHz offset with the change of tuning voltage as well as tuning frequency. The proposed varactorless VCO has a maximum Figure of Merit (FOM) of [Formula: see text][Formula: see text]dBc/Hz with a differential output power of 1.8[Formula: see text]dBm at tuning voltage of 0.7[Formula: see text]V. The elimination of varactor which abates the silicon area consumption and the minimization of the variation of performance parameters are the special outcomes of the proposed active inductor-based VCO. Comparing the performance parameters such as power consumption, FOM and tuning range, the proposed design outperforms most of the cited designs.

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