An analysis of phase noise requirements for ultra-low-power FSK radios

2017 ◽  
Author(s):  
Xing Chen ◽  
Hun-Seok Kim ◽  
David D. Wentzloff
Keyword(s):  
Low Power ◽  
Phase Noise ◽  
Ultra Low Power

scholarly journals A 2.1 GHz, 210 μW, —189 dBc/Hz DCO with Ultra Low Power DCC Scheme

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 805
Author(s):  
Shi Zuo ◽  
Jianzhong Zhao ◽  
Yumei Zhou
Keyword(s):  
Low Power ◽  
Current Efficiency ◽  
Phase Noise ◽  
Duty Cycle ◽  
Semiconductor Manufacturing ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Cmos Process ◽  
Ultra Low Power ◽  
Measured Phase

This article presents a low power digital controlled oscillator (DCO) with an ultra low power duty cycle correction (DCC) scheme. The DCO with the complementary cross-coupled topology uses the controllable tail resistor to improve the tail current efficiency. A robust duty cycle correction (DCC) scheme is introduced to replace self-biased inverters to save power further. The proposed DCO is implemented in a Semiconductor Manufacturing International Corporation (SMIC) 40 nm CMOS process. The measured phase noise at room temperature is −115 dBc/Hz at 1 MHz offset with a dissipation of 210 μμW at an oscillating frequency of 2.12 GHz, and the resulin figure-of-merit is s −189 dBc/Hz.

Complementary BAW oscillator for ultra-low power consumption and low phase noise

2012 ◽  
Vol 73 (3) ◽  
pp. 769-777 ◽  
Author(s):  
Raghavasimhan Thirunarayanan ◽  
Aravind Heragu ◽  
David Ruffieux ◽  
Christian Enz
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Phase Noise ◽  
Low Power Consumption ◽  
Ultra Low Power ◽  
Low Phase Noise

A 400 μW Near-Threshold Feedback Class-C VCO with Auto Amplitude Control

2018 ◽  
Vol 27 (05) ◽  
pp. 1850072
Author(s):  
Chenggang Yan ◽  
Chen Hu
Keyword(s):  
Low Power ◽  
Phase Noise ◽  
Feedback Loop ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Amplitude Control ◽  
Ultra Low Power ◽  
Class C ◽  
Low Phase Noise ◽  
Near Threshold

A 400[Formula: see text][Formula: see text]W near-threshold supply class-C voltage controlled oscillator (VCO) with amplitude feedback loop and auto amplitude control (AAC) is proposed in this paper. The amplitude feedback loop and AAC ensure the robust startup of the proposed VCO and automatically adapts it to the class-C mode in steady state. Consequently, ultra-low power can be achieved in AAC mode and low phase noise, high swing can be achieved in AAC off mode. The proposed VCO with AAC gets ultra-low power consumption by limiting the oscillating amplitude and driving the proposed VCO into the deep Class-C mode. Additionally, the peak value detector is employed in this work to boost the controlling voltage of capacitors bank. Thus, a low on resistance of switch transistors is obtained, which increases the Q value of capacitors bank. The simulated phase noise is [Formula: see text]124.5[Formula: see text]dBc/Hz at 1[Formula: see text]MHz offset with the 1.16[Formula: see text]GHz oscillation frequency. In this case, the figure-of-merit including tuning range (FOMT) of proposed VCO is [Formula: see text]195[Formula: see text]dBc/Hz. The proposed VCO is fabricated in SMIC 40[Formula: see text]nm CMOS process and consumes 0.62[Formula: see text]mA from 0.65[Formula: see text]V supply. The measured phase noise is [Formula: see text]109[Formula: see text]dBc/Hz and FOMT is [Formula: see text]179[Formula: see text]dBc/Hz.

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