In this work a low power, low voltage and high gain operational amplifier is proposed. For this purpose a negative resistance structure is used in parallel with output to improve the achievable gain. Because of using self cascode transistors in the output, the proposed structure remains approximately constant in a relatively large output voltage swing causing an invariable gain. To evaluate the...

Given the inappropriate use of antibiotics and prevalence of resistant bacteria, there is urgentneed for antibacterial drugs that have fewer side effects than antibiotics. Satureja bachtiaricais a medicinal plant which had many uses in traditional medicine. In this research, the ethanolextract of leave of Satureja bachtiarica is tested on coagulase-negative staphylococcus strains.Materials and ...

This paper deals with the analysis of nonlinear circuits that interconnect passive elements (capacitors, inductors, and resistors) resistors exhibiting a range negative resistance. Active are necessary to design physical switch oscillate. We generalize classical passivity theory circuit develop port interconnection for such non-equilibrium behaviors. The approach closely mimics methodology (inc...

from hygienic and economical point of view, drug therapy and prophylaxy in infectious diseases are of great importance. after the world war ii, a reduction in the efficacy of sulfonamide in the treatment of shigellosis was observed and later on it led to a survey on drug resistance and the way of its transmission. the aim of this survey, during which 100 cases of gram-negative bacteria were ide...