دانلود رایگان مقاله An Interleaved Active Clamp Forward Converter with Extended Operating Duty Ratio by Adopting Additional Series-Connected Secondary Windings for Wide Input and High Current Output Applications

دانلود رایگان مقاله An Interleaved Active Clamp Forward Converter with Extended Operating Duty Ratio by Adopting Additional Series-Connected Secondary Windings for Wide Input and High Current Output Applications

This paper presents a new interleaved active clamp forward converter for low and wide input, and high current output applications. In the proposed converter, the operating duty ratio can be extended over 0.5 due to the additional powering path resulting from additional series-connected secondary windings from each transformer.

Read more

دانلود رایگان مقاله DC–DC buck converter solely powered by supercapacitors for efficiently powering the hand-held devices

دانلود رایگان مقاله DC–DC buck converter solely powered by supercapacitors for efficiently powering the hand-held devices

In this study, a closed loop feed-forward direct current (DC)–DC converter has been designed which operates solely on two supercapacitor modules. This is an innovative new design where the challenge was to maintain the constant output voltage when the input voltage of the converter is decaying continuously as a function of time as long as the output load draws current.

Read more

دانلود رایگان مقالهA Front-End ASIC With High-Voltage Transmit Switching and Receive Digitization for 3-D Forward-Looking Intravascular Ultrasound Imaging

دانلود رایگان مقالهA Front-End ASIC With High-Voltage Transmit Switching and Receive Digitization for 3-D Forward-Looking Intravascular Ultrasound Imaging

This paper presents an area- and power-efficient application-specified integrated circuit (ASIC) for 3-D forwardlooking intravascular ultrasound imaging. The ASIC is intended to be mounted at the tip of a catheter, and has a circular active area with a diameter of 1.5 mm on the top of which a 2-D array of piezoelectric transducer elements is integrated.

Read more