In this paper a two-phase supply modulator suitable for envelope tracking power amplifier is presented. The designed supply modulator has the linear assisted switching architecture. Two-phase architecture is used in order to reduce the output switching ripples. The proposed architecture uses hysteretic control instead of pulse width modulation (PWM) which significantly reduces the circuit compl...

knowledge management is the process of capturing, developing, sharing, and effectively using organizational knowledge as we known knowledge management literature emphasizes the importance of knowledge as a valuable asset for smes. this paper highlights the efficient sharing of knowledge as a way of creating core competencies in the smes that are in civil construction activities. this perspectiv...

abstract purpose: the main purpose of this study was to investigate the relationship between job characteristics of librarians of universities under authority of the ministry of health and medical education in tehran and their motivation for knowledge sharing. methodology: method of the research was analytical survey, and the data were gathered using three questionnaires of job characteristics,...

An improved maximum power tracking (MPT) approach with dither signal injection is presented. It incorporates a “shared-bus’’ current-sharing method that can regulate many paralleled current-mode dc-dc converters. Through simulation, the approach yields -nearly uniform currentsharing as well as reliable MPT performance. Utilizing the combined current-sharing and MPT approaches, three proposed ar...