The research on noise in electron devices has two objectives: (i) The study of specific devices, such as the parametric amplifier and the maser, to determine the physical sources of noise and the limitations they impose on the noise performance of the amplifier. The parametric amplifier with coherent input signals at both the signal and idler frequency, and the degenerate parametric amplifier a...

Current Feedback Amplifiers (CFA) are discussed in this report. Current Feedback Amplifiers employ the current mode of signal processing to achieve higher gain-bandwidth product and greater slew rates than those of a Voltage Feedback Amplifier (VFA). The Current Feedback Amplifier topology has an inherent advantage over that of the the Voltage Feedback Amplifier, wherein the amplifier gain can ...

A new symmetrical topology switching power amplifier is introduced for professional audio use. The amplifier is composed by a pair of semi soft switched half-bridges with independent feedback control. Whole overall layout looks very similar than an already bridge configured stereo amplifier with few exceptions. Although the complexity of the proposed topology is at least twice of the convention...

validation of predicting fatness methods in the iranian girls with respect to the maturity process could help to identify anthropometric risk factors. this study evaluate the accuracy of four body composition prediction equations in the teenager students in hamadan city .method: the anthropometry profile of 266 adolescent girls (12-16 ys) including ,weight (55.69±10.18 kg),body mass index (21.9...

The EXCYT facility (EXotics with CYclotron and Tandem) at the INFN-LNS is under completion and its commissioning with Li as the first radioactive beam is foreseen by the end of 2004. In the following, we report the work done with an emphasis on the measured yields and production efficiencies for 8, Li

a. Department of Electronics and Communication Engineering, National Institute of Technology, Meghalaya, Shillong, Meghalaya-793003, India. b. Department of Electronics and Communication Engineering, JIS College of Engineering, Kalyani, West Bengal-741235, India. c. Department of Electronics and Telecommunication Engineering, Bengal Engineering and Science University, Shibpur, Howrah-711103, In...

A recently introduced double-base number representation has proved to be successful in improving the performance of several algorithms in cryptography and digital signal processing. The index-calculus version of this number system can be regarded as a two-dimensional extension of the classical logarithmic number system. This paper builds on previous special results by generalizing the number sy...