A 20 GHz subharmonic injection-locked clock multiplier with mixer-based injection timing control in 65 nm CMOS technology

2018 ◽  
Vol 99 (1) ◽  
pp. 147-157
Author(s):  
Fangxu Lv ◽  
Xuqiang Zheng ◽  
Jianye Wang ◽  
Guoli Zhang ◽  
Ziqiang Wang ◽  
...  
2014 ◽  
Vol 50 (12) ◽  
pp. 855-857 ◽  
Author(s):  
Ke Huang ◽  
Ziqiang Wang ◽  
Xuqiang Zheng ◽  
Chun Zhang ◽  
Zhihua Wang

2015 ◽  
Vol 8 (3) ◽  
pp. 1012-1020 ◽  
Author(s):  
Gabriel Ingesson ◽  
Lianhao Yin ◽  
Rolf Johansson ◽  
Per Tunestal

Author(s):  
Jessica Adair ◽  
Matthew Viele ◽  
Ed Van Dyne

Emissions regulations for off-highway engines are tightening towards those of on-highway engines. Present designs will not be able to meet these more stringent regulations because of their use of mechanical fuel injection timing control; more advanced timing control will be required. Ion sensing combined with variable fuel injection timing may help these engines meet the emissions requirements without the drastic price increase that usually accompanies a switch to advanced fuel injection technology. Ion sensing can detect the start of combustion and this signal can be used for closed loop control for the injection timing. The integrity of the ion signal is highly dependent on combustion chamber geometry, sensor placement, and even the polarity of the charge across the sensor. Optimizing all of these effects could improve the detection of the start of combustion from an ion sensor to less than one crank angle degree and provide a signal for closed loop control of the injection timing.


Author(s):  
N Shivakumar ◽  
G Antony Casmir Jayaseelan ◽  
Parthiban ◽  
Ahmed ◽  
Akshay

2017 ◽  
Vol 68 (6) ◽  
pp. 415-424
Author(s):  
Oktay Aytar ◽  
Ali Tangel ◽  
Engin Afacan

Abstract This paper presents design and simulation of a 4-bit 10 GS/s time interleaved ADC in 0.25 micrometer CMOS technology. The designed TI-ADC has 4 channels including 4-bit flash ADC in each channel, in which area and power efficiency are targeted. Therefore, basic standard cell logic gates are preferred. Meanwhile, the aspect ratios in the gate designs are kept as small as possible considering the speed performance. In the literature, design details of the timing control circuits have not been provided, whereas the proposed timing control process is comprehensively explained and design details of the proposed timing control process are clearly presented in this study. The proposed circuits producing consecutive pulses for timing control of the input S/H switches (ie the analog demultiplexer front-end circuitry) and the very fast digital multiplexer unit at the output are the main contributions of this study. The simulation results include +0.26/−0.22 LSB of DNL and +0.01/−0.44 LSB of INL, layout area of 0.27 mm2, and power consumption of 270 mW. The provided power consumption, DNL and INL measures are observed at 100 MHz input with 10 GS/s sampling rate.


2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Shouzong Liu ◽  
Ling Yu ◽  
Mingzhan Huang ◽  
Xiangyun Shi

AbstractIn this paper, we study the injection strategies of insulin for the impulsive therapy of diabetes in a limited time. According to whether we consider the risk of hypoglycemia or not, we develop two different control objectives and investigate three different injection strategies for each control objective. We apply a time-rescaling method to overcome technical obstacles in optimal impulsive control and compute the gradient formulas of cost functions with respect to injection doses and injection timings. By means of numerical simulations we get the optimal injection doses and injection timings for each injection strategy. Our study indicates that for the control objective without considering the risk of hypoglycemia, the optimal injection timing control is more effective than the optimal injection dose control, whereas the mixed control achieves almost the same effect as the optimal injection timing control. For the other control objective considering the risk of hypoglycemia, the optimal injection timing control performs better than the optimal injection dose control in avoiding emergence of hypoglycemia, and the mixed control provides the best strategy in preventing hyperglycemia from occurrence.


1988 ◽  
Vol 49 (C4) ◽  
pp. C4-41-C4-44
Author(s):  
G. J.T. DAVIDS ◽  
P. B. HARTOG ◽  
J. W. SLOTBOOM ◽  
G. STREUTKER ◽  
A. G. van der SIJDE ◽  
...  
Keyword(s):  

1988 ◽  
Vol 49 (C4) ◽  
pp. C4-13-C4-22
Author(s):  
F. NEPPL ◽  
H.-J. PFLEIDERER
Keyword(s):  

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