A High-Efficiency Switched-Capacitance HTFET Charge Pump for Low-Input-Voltage Applications

2015 ◽  
Author(s):  
Unsuk Heo ◽  
Xueqing Li ◽  
Huichu Liu ◽  
Sumeet Gupta ◽  
Suman Datta ◽  
...  
Keyword(s):  
High Efficiency ◽  
Charge Pump ◽  
Input Voltage ◽  
Low Input

A 50 mV Fully-Integrated Self-Startup Circuit for Thermal Energy Harvesting

2017 ◽  
Vol 26 (12) ◽  
pp. 1750196 ◽  
Author(s):  
Yanzhao Ma ◽  
Yinghui Zou ◽  
Shengbing Zhang ◽  
Xiaoya Fan
Keyword(s):  
Energy Harvesting ◽  
Thermal Energy ◽  
Output Voltage ◽  
Charge Pump ◽  
Input Voltage ◽  
Fully Integrated ◽  
Input Capacitance ◽  
Low Input ◽  
Lc Oscillator ◽  
Thermal Energy Harvesting

A fully-integrated self-startup circuit with ultra-low voltage for thermal energy harvesting is presented in this paper. The converter is composed of an enhanced swing LC oscillator and a charge pump with decreased equivalent input capacitance. The LC oscillator has ultra-low input voltage and high output voltage swing, and the charge pump has a fast charging speed and small equivalent input capacitance. This circuit is designed with 0.18[Formula: see text][Formula: see text]m standard CMOS process. The simulation results show that the output voltage is in the range of 0.14[Formula: see text]V and 2.97[Formula: see text]V when the input voltage is changed from 50[Formula: see text]mV to 150[Formula: see text]mV. The output voltage could reach 2.87[Formula: see text]V at the input voltage of 150[Formula: see text]mV and the load of 1[Formula: see text]M[Formula: see text]. The maximum efficiency is in the range of 10.0% and 14.8% when the input voltage is changed from 0.2[Formula: see text]V to 0.4[Formula: see text]V. The circuit is suitable for thermoelectric energy harvesting to start with ultra-low input voltage.

scholarly journals High gain boost converter with modified voltage multiplier for stand alone PV system

2019 ◽  
Vol 14 (1) ◽  
pp. 185
Author(s):  
Getzial Anbu Mani ◽  
A. K. Parvathy
Keyword(s):  
High Efficiency ◽  
Input Voltage ◽  
High Gain ◽  
Boost Converter ◽  
Pv System ◽  
Boost Converters ◽  
Low Input ◽  
Voltage Multiplier ◽  
Photo Voltaic ◽  
Current Ripple

<p>Boost converters of high gain are used for photo voltaic systems to obtain high efficiency. These high gain Boost converters gives increased output voltage for a low input produces high outputs for low input voltage. The High gain boost converters have the following merits. Conduction losses input current ripple and stress across the switches is reduced while the efficiency is increases. The high gain of the converters with the above said merits is obtained by changing the duty cycle of switches accordingly .In this paper a boost converter working with interleaved concept along with a additional Nstage voltage Multiplier has been carried out by simulation using MATLAB/ simulink and the mathematical modeling of various parameters is also done.</p>

scholarly journals Novel CMOS Bulk-driven Charge Pump for Ultra Low Input Voltage

2016 ◽  
Vol 25 (2) ◽  
pp. 321-331 ◽  
Author(s):  
G. Nagy ◽  
D. Arbet ◽  
V. Stopjakova ◽  
M. Kovac
Keyword(s):  
Charge Pump ◽  
Input Voltage ◽  
Low Input

A Stable Mode-Selectable Oscillator with Variable Duty Cycle and High-Efficiency

2015 ◽  
Vol 24 (09) ◽  
pp. 1550132 ◽  
Author(s):  
Li-Ye Cheng ◽  
Xin-Quan Lai
Keyword(s):  
Duty Cycle ◽  
High Efficiency ◽  
Dynamic Performance ◽  
Operation Mode ◽  
Charge Pump ◽  
Input Voltage ◽  
Cmos Process ◽  
Pump Efficiency ◽  
Stable Mode ◽  
Wide Range

A mode-selectable oscillator (OSC) with variable duty cycle for improved charge pump efficiency is proposed in this paper. The novel OSC adjusts its duty cycle according to the operation mode of the charge pump, thus improves the charge-pump efficiency and dynamic performance. The control of variable duty cycle is implemented in digital logic hence it provides robust noise immunity and instantaneous response. The OSC and the charge-pump have been implemented in a 0.6-μm 40-V CMOS process. Experimental results show that the peak efficiency is 92.7% at 200-mA load, the recovery time is less than 25 μs and load transient is 15 mV under 500-mA load variation. The system is able to work under a wide range of input voltage (V IN ) in all modes with low EMI.

scholarly journals A Low Input Voltage Charge Pump for Energy Harvesting

2020 ◽  
Vol 1550 ◽  
pp. 052026
Author(s):  
Yi Li ◽  
Sheng ming Huang ◽  
Quanzhen Duan
Keyword(s):  
Energy Harvesting ◽  
Charge Pump ◽  
Input Voltage ◽  
Low Input

Charge Pump Circuit Design for a Low Input Voltage

2014 ◽  
Vol 7 (5) ◽  
pp. 259-268
Author(s):  
Sung-Dae Yeo ◽  
Young-Jin Jang ◽  
Kyoung-Kun Lee ◽  
Seong-Jong Kim ◽  
Seong-Kweon Kim
Keyword(s):  
Circuit Design ◽  
Charge Pump ◽  
Input Voltage ◽  
Low Input ◽  
Charge Pump Circuit
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