In this paper, a 1.2-V RF front-end realized for the personal communications services (PCS) direct conversion receiver is presented. The RF front-end comprises a low-noise amplifier (LNA), quadrature mixers, and active RC low-pass filters with gain control. Quadrature local oscillator (LO) signals are generated on chip by a double-frequency voltage-controlled oscillator (VCO) and frequency divi...

Amplifier Using Volterra Series Analysis,” IEEE Trans. Microwwe Theory Tech., vol. MTT-33, pp. 1395-1403, Dec. 1985. R. Gilmore, “Nonlinear Circuit Design Using the Modified Harmonic Balance Algorithm,” IEEE Trans. Microwave Theon Tech., vol. MTT34, pp. 1294-1307, Dec. 1986. A. M. Crosmun and S. A. Maas, “Minimization of Intermodulation Distortion in GaAs MESFET Small-Signal Amplifiers,” IEEE T...

Polymeric microfluidic systems are well suited for miniaturized devices with complex functionality, and rapid prototyping methods for 3D microfluidic structures are increasingly used. Mixing at the microscale and performing chemical reactions at the microscale are important applications of such systems and we therefore explored feasibility, mixing characteristics and the ability to control a ch...

In this paper, we investigate the transport and mixing process of the batch mixers with two different configurations, the centered-blade and offset-blade mixers, by using a dynamical system approach. The 2-D velocity fields of the mixers measured using Particle Image Velocimetry (PIV) are used to identify the Lagrangian coherent structures (LCSs). The results show that the LCSs separate the phy...

the aim of this trial was to determine the toxic effect of oms-43 on spraymen and inhabitants. the spraying operation lasted for 30 successive days, and two teams consisting of 20 spraymen, 2 mixers, 4 foremen and team leaders were engaged in this operation. the operators were under systematic and closed clinical observation and cholinesterase determination (tintometric method) during the opera...

A direct conversion modulator-demodulator with even harmonic mixers for fixed wireless applications is presented. The circuits consist of even harmonic mixers (EHMs) realized with antiparallel diode pairs (APDPs). A communication link is set up to examine the overall performance of proposed modulator-demodulator. The transmission of 16-QAM signal with 110Mbps data rate over fixed wireless link ...