The human pharyngeal airway during sleep is conventionally modeled as a Starling resistor. However, inspiratory flow often decreases with increasing effort (negative effort dependence, NED) rather than remaining fixed as predicted by the Starling resistor model. In this study, we tested a major prediction of the Starling resistor model--that the resistance of the airway upstream from the site o...

Abstract – This paper presents the cross-coupled MOS resistor circuits. The circuits consist of two internal pairs of NMOS and PMOS transistors, and their critical width and length parameters regulate the drain current, transconductance, and output drain resistance. Consequently it determines the output resistance of the circuits. The cross-coupled MOS resistor circuits can be used in multiplic...

A power divider (PD)/ power combiner (PC) with high quality factor and enhanced output ports isolation using substrate integrated waveguide (SIW) technology is proposed. An SIW cavity is designed to provide a high quality factor filtering response and an SMD resistor is attached between two output ports to realize the high isolation. The value of the applied resistor is calculated by using the ...

A new, simple, and low cost frequency independent phase shifter is presented. The design is based on a simple op-amp phase shifter with programmable floating resistor and programmable capacitor. The phase shift can be varied using the programmable resistor. Compensation for the variation in the frequency is achieved using the programmable capacitor. Experimental and simulation results confirm t...

A switched capacitor circuit which simulates Frequency Dependant Negative Resistor is proposed. The circuit is controlled by three phases clock and needs one unity gain buffer. A comparison among SC FDNRs in other references is shown. SWITCAP simulation of SC filter using these circuits are also shown. Key-Words; Switched-Capacitor(SC) Frequency Dependant Negative Resistor(FDNR) Filter immittan...

Synchronization phenomena in complex systems are very interesting to describe various higher-dimensional nonlinear phenomena in the field of natural science. Studies on synchronization phenomena of coupled oscillators are extensively carried out in various fields, physics [1]-[4], biology [5], [6] engineering [7]-[11] and so on. Because many researchers suggest that synchronization phenomena of...