A low power and wide frequency range voltage controlled oscillator with quadrature outputs

2008 ◽  
Author(s):  
Nima Haghighi ◽  
Kaamran Raahemifar
Keyword(s):  
Low Power ◽  
Wide Frequency Range ◽  
Voltage Controlled Oscillator ◽  
Frequency Range

scholarly journals Low Phase Noise and Wide-Range Class-C VCO Using Auto-Adaptive Bias Technique

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1290
Author(s):  
Jeong-Yun Lee ◽  
Gwang Sub Kim ◽  
Goo-Han Ko ◽  
Kwang-Il Oh ◽  
Jae Gyeong Park ◽  
...  
Keyword(s):  
Phase Noise ◽  
Tuning Range ◽  
Frequency Tuning ◽  
Wide Frequency Range ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Frequency Range ◽  
Wide Range ◽  
Class C ◽  
Low Phase Noise

This paper proposes a new structure of 24-GHz class-C voltage-controlled oscillator (VCO) using an auto-adaptive bias technique. The VCO in this paper uses a digitally controlled circuit to eliminate the possibility of start-up failure that a class-C structure can have and has low phase noise and a wide frequency range. To expand the frequency tuning range, a 3-bit cap-bank is used and a triple-coupled transformer is used as the core inductor. The proposed class-C VCO implements a 65-nm RF CMOS process. It has a phase noise performance of −105 dBc/Hz or less at 1-MHz offset frequency and the output frequency range is from 22.8 GHz to 27.3 GHz, which consumes 8.3–10.6 mW of power. The figure-of-merit with tuning range (FoMT) of this design reached 191.1 dBc/Hz.

A wide frequency range delay line for fast-locking and low power delay-locked-loops

2016 ◽  
Vol 90 (2) ◽  
pp. 427-434 ◽  
Author(s):  
Motahhareh Estebsari ◽  
Mohammad Gholami ◽  
Mohammad Javad Ghahramanpour
Keyword(s):  
Low Power ◽  
Delay Line ◽  
Wide Frequency Range ◽  
Frequency Range ◽  
Delay Locked Loops
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