Large rooms can pose a heating challenge: They tend to have drafty, hard-to-reach corners and require more energy to warm up properly during the winter months. To find the best space heaters for large ...

Abstract: In order to improve the sampling frequency and sampling accuracy of the analog-to-digital converter, a multichannel sample and hold circuit controlled by delay-locked loop was designed based ...

This paper propose the use of “Proportional-Resonant” (PR) controllers for Power Factor Correction (PFC) circuits used in front-end converters for grid-connected applications. The performance of the ...

The best electric heaters help stave off the autumn or winter chill by providing a quick burst of concentrated warmth wherever you need it in your home. We've tested electric heaters from Argos, ...