A Low Power and jitter Delay Cell with Pulse Width Modulation for Wide Range Delay Lock Loops

2021 ◽  
pp. 105054
Author(s):  
Shahram Modanlou ◽  
G. Ardeshir ◽  
M. Gholami
Keyword(s):  
Low Power ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Delay Cell ◽  
Wide Range ◽  
Jitter Delay

Integrated DC-AC and AC-DC converter using H-converter for wide range voltage applications

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Saravanan R. ◽  
Vijayshankar S. ◽  
Sathyaseelan Sathyaseelan ◽  
Suresh K.
Keyword(s):  
Pulse Width ◽  
Power Loss ◽  
Pulse Width Modulation ◽  
Modulation Scheme ◽  
Power Losses ◽  
Content Type ◽  
One Stage ◽  
Energy Storage Application ◽  
Wide Range ◽  
Zero Sequence

Purpose This paper aims to propose Hidden Converter (H-Converter) combined with dual port 3Ø inverter for energy storage application to produce wide range of voltage. Some of the application required wide range of voltages, but problem from E-chopper is either boost or buck mode of operations, both modes are not possible. To overcome this drawback, H-Converter is combined with dual port 3Ø inverter controlled by carrier-based pulse width modulation (CB-PWM) technique is added with zero sequence injection. Design/methodology/approach Hidden converter is a bidirectional DC-DC chopper used to convert fixed DC to variable DC and vice versa in both buck and boost modes of operations. Dual port inverter is combined with hidden DC-DC converter can produce wide range of voltages. Findings The bidirectional DC-AC converter requires less power for processing and consumes less power losses by using modest carrier built- pulse width modulation scheme through proposed zero structure addition. Originality/value By using this proposed strategy H-Converter can produce wide range of voltage in both the sides and mostly power is processed in the 3Ø inverter with a one stage conversion with less power loss. As a result, with one stage power conversion has more efficiency because of less power loss. This proposed converter has designed by analysis, and the real time result is tested in an experiment.

scholarly journals Smartphone-Driven Low-Power Light-Emitting Device

2017 ◽  
Vol 2017 ◽  
pp. 1-6
Author(s):  
Hea-Ja An ◽  
Kyung-Won Kim ◽  
Mun-Ho Ryu ◽  
Han-Yeong Oh ◽  
Nam-Gyun Kim ◽  
...  
Keyword(s):  
Low Power ◽  
Alternative Medicine ◽  
Laser Therapy ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Control Unit ◽  
Smartphone Application ◽  
Recent Past ◽  
Light Emitting ◽  
Low Level

Low-level light (laser) therapy (LLLT) has been widely researched in the recent past. Existing LLLT studies were performed based on laser. Recently, studies using LED have increased. This study presents a smartphone-driven low-power light-emitting device for use in colour therapy as an alternative medicine. The device consists of a control unit and a colour probe. The device is powered by and communicates with a smartphone using USB On-The-Go (OTG) technology. The control unit controls emitting time and intensity of illumination with the configuration value of a smartphone application. Intensity is controlled by pulse width modulation (PWM) without feedback. A calibration is performed to resolve a drawback of no feedback. To calibrate, intensity is measured in every 10 percent PWM output. PWM value is linearly calibrated to obtain accurate intensity. The device can control the intensity of illumination, and so, it can find application in varied scenarios.

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