A novel method of output voltage stabilization with respect to load current variation in noncontact energy transfer

2005 ◽  
Vol 151 (2) ◽  
pp. 63-74
Author(s):  
Hideki Abe ◽  
Hiroshi Sakamoto ◽  
Koosuke Harada
Keyword(s):  
Energy Transfer ◽  
Output Voltage ◽  
Load Current ◽  
Voltage Stabilization ◽  
Current Variation ◽  
Novel Method

scholarly journals An Automatic Offset Calibration Method for Differential Charge-Based Capacitance Measurement

2021 ◽  
Vol 11 (2) ◽  
pp. 22
Author(s):  
Umberto Ferlito ◽  
Alfio Dario Grasso ◽  
Michele Vaiana ◽  
Giuseppe Bruno
Keyword(s):  
Standard Deviation ◽  
Output Voltage ◽  
Process Variations ◽  
Calibration Method ◽  
Capacitance Measurement ◽  
Effective Technique ◽  
Fully Integrated ◽  
Front End ◽  
Novel Method ◽  
On Chip

Charge-Based Capacitance Measurement (CBCM) technique is a simple but effective technique for measuring capacitance values down to the attofarad level. However, when adopted for fully on-chip implementation, this technique suffers output offset caused by mismatches and process variations. This paper introduces a novel method that compensates the offset of a fully integrated differential CBCM electronic front-end. After a detailed theoretical analysis of the differential CBCM topology, we present and discuss a modified architecture that compensates mismatches and increases robustness against mismatches and process variations. The proposed circuit has been simulated using a standard 130-nm technology and shows a sensitivity of 1.3 mV/aF and a 20× reduction of the standard deviation of the differential output voltage as compared to the traditional solution.

An Online No-Break With Power Factor Correction and Output Voltage Stabilization

2005 ◽  
Vol 20 (5) ◽  
pp. 1109-1117 ◽  
Author(s):  
V.M. Pacheco ◽  
L.C. de Freitas ◽  
J.B. Vieira ◽  
A.A. Pereira ◽  
E.A.A. Coelho ◽  
...  
Keyword(s):  
Power Factor ◽  
Output Voltage ◽  
Power Factor Correction ◽  
Voltage Stabilization

scholarly journals A Low EMI DC-DC Buck Converter with a Triangular Spread-Spectrum Mechanism

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 856
Author(s):  
Jing-Yuan Lin ◽  
Yi-Chieh Hsu ◽  
Yo-Da Lin
Keyword(s):  
Spread Spectrum ◽  
Electromagnetic Interference ◽  
Output Voltage ◽  
Buck Converter ◽  
Circuit Board ◽  
System Stability ◽  
Maximum Efficiency ◽  
Load Current ◽  
Voltage Range ◽  
Switching Regulators

In this paper, a triangular spread-spectrum mechanism is proposed to suppress the electromagnetic interference (EMI) of a DC-DC buck converter. The proposed triangular spread-spectrum mechanism, which is implemented in the chip, can avoid modifying the printed circuit board of switching regulators. In addition, a lower ripple of output voltage of switching regulators and a better system stability can be realized by the inductive DC resistance (DCR) current sensing circuit. The chip is fabricated by using TSMC 0.18-μm 1P6M CMOS technology. The chip area including PADs is 1.2 × 1.15 mm2. The input voltage range is 2.7~3.3 V and the output voltage is 1.8 V. The maximum load current is 700 mA. The off-chip inductor and capacitor are 3.3 μH and 10 μF, respectively. The experimental results demonstrate that the maximum spur of the proposed DC-DC buck converter with the triangular spread-spectrum mechanism improves to 14dBm. Moreover, the transient recovery time of step-up and step-down loads are both 5 μs. The measured maximum efficiency is 94% when the load current is 200 mA.

A Three-Stage Coarse-Fine-Tuning Analog-Assisted Digital LDO

2020 ◽  
pp. 2150047
Author(s):  
Lianxi Liu ◽  
Yiwei Chen ◽  
Xufeng Liao ◽  
Junchao Mu ◽  
Yintang Yang
Keyword(s):  
Output Voltage ◽  
Maximum Load ◽  
Input Voltage ◽  
Fine Tuning ◽  
Cmos Process ◽  
Load Current ◽  
Input Range ◽  
Low Dropout Regulator ◽  
Layout Area ◽  
Two Stages

This paper proposes a three-stage coarse-fine-tuning analog-assisted digital low dropout regulator (AAD-LDO) without digital ripple. The digital regulation consists of two stages, which break the accuracy-speed-power trade-off. To further improve transient response, a step-variable counter used in the first stage is designed, which makes sure that the output current can track the load current rapidly. The ripple caused by the digital regulation disappears due to the existence of the analog-assistant stage (in the proposed AAD-LDO). As a result, the AAD-LDO achieves the output voltage with high accuracy. Designed in a 0.18[Formula: see text][Formula: see text]m CMOS process, the proposed AAD-LDO has a layout area of 0.133[Formula: see text]mm. For the input range of 1.2–1.8[Formula: see text]V, the output voltage is 1[Formula: see text]V. The maximum load current is 10[Formula: see text]mA at the input voltage of 1.2[Formula: see text]V. The linear regulation and load regulation are 0.061[Formula: see text]mV/V and 0.0082[Formula: see text]mV/mA, respectively. The over/undershoot is suppressed effectively for a 9.5[Formula: see text]mA load step. The peak current efficiency is 99.78%.

Slew Rate and Transient Response Enhancement in MOLDO with Modifying Error Amplifier Structure

2017 ◽  
Vol 26 (12) ◽  
pp. 1750197 ◽  
Author(s):  
Fatemeh Abdi ◽  
Mahnaz Janipoor Deylamani ◽  
Parviz Amiri
Keyword(s):  
Transient Response ◽  
Output Voltage ◽  
Input Voltage ◽  
Bias Current ◽  
Cmos Process ◽  
Slew Rate ◽  
Load Current ◽  
Rate Enhancement ◽  
Error Amplifier ◽  
Response Enhancement

In this paper, we use bias current boosting and slew rate enhancement in multiple-output Low-dropout structure to achieve a faster transient response. This method reduces ripples of output voltage during sudden changes in load current and input voltage. The proposed MOLDO circuit was simulated with a 0.18[Formula: see text][Formula: see text]m CMOS process in buck mode with four-output legs. Integrating of proposed circuit is easier because there is the symmetry in the circuit designing. The results of our work show that when input voltage changes between 2.5–3.3[Formula: see text]V, the output voltage after 25[Formula: see text][Formula: see text]s with load current of 100[Formula: see text]mA, is determined with ripple less than 1.8[Formula: see text]mV. In sudden changes, the load current at the range 0–100[Formula: see text]mA, and output voltages after a maximum 15.5[Formula: see text][Formula: see text]s with an input voltage of 3.3[Formula: see text]V have the highest ripple in output voltage of 4[Formula: see text]mV.

scholarly journals Analysis of Controlled Single-phase Full-Wave Rectifier with RL Load

2018 ◽  
Vol 3 (12) ◽  
pp. 25-31
Author(s):  
Aniagboso John Onah
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Load Current ◽  
Full Wave ◽  
Half Wave ◽  
Three Phase ◽  
Continuous Current ◽  
Current Operation ◽  
Wave Converter

Diodes are popularly used in rectifiers, which convert an ac signal into a unidirectional signal. They produce a fixed output voltage only. However, controlled switches such as thyristors are used to vary the output voltage of a converter by adjusting the delay or firing angle α of the thyristors. Phase-controlled converters are simple, efficient and less expensive. There are both single-phase and three-phase converters depending on the input supply. We also have half-wave and full-wave converters. The half-wave converter has only one polarity of output voltage and current, while for the full converter, the polarity of the output voltage can be either positive or negative. The purpose of this paper is to investigate the operation of the Single-phase full-wave rectifier. Load current for the controlled full-wave rectifier with R-L load can be either discontinuous or continuous. The paper shows how the rectifier transits from discontinuous current operation to continuous current operation.

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