@iR. ..... ........... VCCD PE ....... ........ Q ........... vcc GND ............ ........... ......... A radio frequency power amplijier for 4.8-5.7GHz has been realized in a 0.25 pm SiGe-bipolar technology. The balanced 2-stage push-pull power amplger uses two onchip transformers as input-balun and for interstage matching. Further it uses three coils for the integrated LC-output balun and th...

Wireless communication receivers work with radio frequency (RF) input signals with a huge dynamic range of 50dB and more. In order to provide the analog-to-digital converters (ADCs) in the receivers with an optimal signal strength, the gains of the RF and IF (intermediate frequency) stages have to be tuned according to the strength of the RF input signal. The RF input signal strength can be est...

In present day society where communication technologies are advancing at spiral rate, the need for efficient integrated circuit design to transmit and receive signals at unlicensed frequency spectrum is inevitable. At receiving front end, the low noise amplifier design, being the first building block to receive the signal puts a tremendous challenge on modern day radio frequency engineers to me...

This paper surveys the results of an extended research activity concerning the effects of radio frequency interference (RFI) on integrated circuits (IC's). Initially, the possible injection methods for conducted and radiated interference are presented, discussing their applicability and limitations. Then, the basic results of the susceptibility analysis of operational amplifiers and smart power...

simple snoring is a social problem, one that can gravely affect the patient's married life. about 40% of men and 20% of women are affected, and it often goes along with sleep-disordered breathing. up to now various surgical techniques have been defined such as uppp(uvulopalatopharyngo plasty), and laser-assisted uvulopalatoplasty (laup). among the surgical methods, raup (radiofrequency assisted...

background and aims:  using methods such as pulsed radiofrequency (prf) and nerve blocks are among the methods used in pain clinics to treat facet-originating low back pain. this study compares two methods of pulsed radiofrequency and facet joint block (fjb)regarding pain recovery and improving disability of patients suffering from facet-originating low back pain. material and method: 50 patien...

Pulsed radiofrequency, in which short bursts of radiofrequency energy are applied to nervous tissue, has been recently described as an alternative technique devoid of nerve injury, a subsequent side effect of thermal lesions created by continuous radiofrequency lesioning. Yet the mechanism of this effect remains unclear. In this study we compared the acute effects of pulsed versus continuous ra...

A novel active feedback frequency compensation scheme is presented in this work. Based on the proposed technique, an amplifier with two main poles in its frequency bandwidth can be easily compensated by introducing a pole-zero pair in a local feedback. The proposed method is mathematically analyzed and then based on the derived formulations, a design procedure is established. The capability of ...