AIM Providing consistent levels of oxygen saturation (SpO2 ) for infants in neonatal intensive care units is not easy. This study explored how effectively the Auto-Mixer(®) algorithm automatically adjusted fraction of inspired oxygen (FiO2 ) levels to maintain SpO2 within an intended range in extremely low birth weight infants receiving supplemental oxygen without mechanical ventilation. METH...

We report a continuous-flow, microfluidic mixer utilizing mid-infrared hyperspectral imaging detection, with an experimentally determined, submillisecond mixing time. The simple and robust mixer design has the microfluidic channels cut through a polymer spacer that is sandwiched between two IR transparent windows. The mixer hydrodynamically focuses the sample stream with two side flow channels,...

The presented article describes two basic technological blocks of so called Flexible power unit which is located in the grounds of the Vı́tkovice company Ostrava in the Czech Republic. The experimental unit was established to research the use of potential energy in a mixture of dry air and superheated steam, which is called air/steam mixture. Creation of air/steam mixture is carried out by mixer...

An 8-10 GHz X-band upconversion quadrature mixer stage implemented in 250 nm SiGe BiCMOS is presented. Orthogonality of the spurious responses caused by clock feed through, I/Q mismatch and baseband harmonics after self-mixing was exploited to realize a baseband calibration scheme reducing all in-band spurs down to below -73dBc, for baseband signals up to a bandwidth of 2MHz and with an IF cent...

This report describes a sub-harmonic mixer for WCDMA applications. The circuit converts a 2 GHz RF signal directly to baseband using a 1 GHz LO frequency. The mixer uses common source MOSFETs with inductive degeneration to convert the input RF voltage to a current. This current is then steered using a switching network composed of triode-region MOSFETs that is driven with the LO and a 90 degree...

In this study, we introduce a zero-IF sub-harmonic mixer with high isolation in the 5GHz band using 0.18μm CMOS technology. Placing an LC-Tank between the class AB stage and the mixer core improves the isolation between the LO and RF ports. The measured isolation is obtained with a 48 dB between LO and RF ports; and a 9.5dB conversion gain is acquired while consuming 7mA at 2.5V supply voltage....

A down conversion RF mixer is designed with 65nm CMOS technology for a different low power consumption applications. Mixer structure comprises a double-balanced Gilbert-Cell with improving linearity method in the RF stage of circuit; all is at a supply voltage of 1.8V and a power of 2.17 mW. The circuit is simulated for different spectrum applications as: 200 MHz mobile users, 1.9 GHz wireless ...

In recent years, the CMRC filter has been an attractive candidate for use in mixer and frequency multiplier circuits to improve the performance due to its low-insertion loss, sharp rejection, shorter size and wider stop-band. However, complex structures, too much variables and inefficient design method hindered its widespread use. In this study, we report on the application of the implicit spac...

The mixing behavior around a SMX-type static mixer segment has been investigated experimentally by using Particle Image Velocimetry (PIV) and Planar Laser-Induced Fluorescence (PLIF) simultaneously. To quantify mixing, velocity fields and concentration fields have been measured for different Reynolds numbers along vertical and horizontal sections directly behind the mixer. The experimental data...

This study treats one important aspect of starch-filled rubber compounds which is their rheological behavior. Starch-based SBR1712 masterbatches resulting from various formulations were prepared using a mini two roll mill and an internal mixer (Plastograph Brabender).The content in starch was varied from 0 to 50 phr. The effect of starch content on the rheological behavior was ev...