Recent Patents on Electrical & Electronic Engineering (Formerly Recent Patents on Electrical Engineering) - Volume 6, Issue 2, 2013

In this paper, a review of the major evolution steps of mobile transmitter architectures is summarized. We propose a classification and discuss about improvements and evolutions towards the full-digital solutions. This discussion is mandatory while the cognitive-radio concept implies the design of new structures for multi-radio front-ends. Technological process improvements, for example CMOS for high frequency, opens Read More

During the last decade, spread spectrum techniques have become more and more popular in the field of mobile communication systems. In particular, satellite systems (GPS and Galileo) as well as the third generation radio mobile system have adopted the direct sequence spread spectrum as the communication technology of the physical layer. The receiver must first perform a code acquisition and then maintain Read More

The recent discovery of the first modern prototype of the 4th fundamental circuit element by HP Laboratories turned the attention of both academia and industry to today’s broad classification of resistance switching devices, known as memristive devices and systems. The variety of applications which have been proposed recently, ranging from memory and reconfigurable architectures to neuromorphic learning and Read More

Recent patents and approaches of symbol timing and frequency offset estimation in optical OFDM systems are reviewed. The synchronization methods utilizing the training sequence or cyclic prefix are discussed and compared. The processing approaches includes subtraction, low-power DC offset, auto- and cross-correlation schemes.The synchronization methods have been evaluated in terms of the efficiency and comple Read More

A bias generation scheme for CMOS cascode current mirrors is proposed. The bias voltage generated is equal to the sum of the overdrive voltage of the mirroring transistor and the gate source voltage of the cascode transistor. The proposed scheme is designed in a 65n m n-well CMOS process with 1.8V supply and simulation results are provided for different process corners. The proposed idea is also found in the patent [1].

In this study, the employment of permanent magnet (PM) in linear switched reluctance motor (LSRM) is studied in order to find the less cogging force construction with respect to an enhanced propulsion force. First, the three types are considered for the proposed structure and PM is added in the pole of the moveable part of LSRM. Then, PM width is increased till it covers all surface of the pole. After that, the propulsion force Read More

The main aim of this paper is to introduce a robust method for distance enhancing of a narrow band digital multipoint communication system. Despite the conventional power line carrier technologies and communicating standards such as EIA – 485, the large signal definition of the Frequency and Amplitude combined Modulations in Power Line Communication (FAMPLC) eliminates the requirement of any repeater fa Read More

In this paper, some of the most recent patents about the switching regulators that use both PWM (Pulse Width Modulation) and PFM (Pulse Frequency Modulation) to improve the efficiency are introduced. The proper switching between the modes as one of the major design concerns is reviewed. Also, a novel architecture that helps to reduce the number of the inductors in SIMO (Single Input Multiple Outputs) systems is i Read More