An electrospray microchip for mass spectrometry comprising an integrated passive mixer to carry out on-chip chemical derivatizations is described. The microchip fabricated using UV-photoablation is composed of two microchannels linked together by a liquid junction. Downstream of this liquid junction, a mixing unit made of parallel oblique grooves is integrated to the microchannel in order to cr...

A DC-offset cancellation scheme in the 5GHz directconversion receiver compliant with IEEE 802.11a wireless LAN standard is described in this paper. It uses the analog R~F4~~ i"a I oU feedback loop to eliminate the DC-offset at the output of the double-balanced mixer. The mixer has a simulation voltageA conversion gain of 13dB at 5.2GHz, noise figure of 9.67dB, -. 1) IIP3 of 7.6dBm. The solution...

Mixer is one of the significant components of the radio frequency transceiver that translate baseband signal into RF and vice versa. In this paper, 2.4 GHz double balanced Gilbert Cell Mixer topology was simulated to study its important properties such as Conversion Gain, Linearity, Noise Figure and Port Isolation. Further, a band pass filter is added in to the design at IF port so as to reject...

Mixing is a unit operation that combines two or more components into a homogeneous mixture. This work involves mixing two viscous liquid streams using an in-line static mixer. The mixer is a split-and-recombine design that employs shear and extensional flow to increase the interfacial contact between the components. A prototype split-and-recombine (SAR) mixer was constructed by aligning a ser...

The ALMA Band 6 (211-275 GHz) receivers use sideband-separating SIS mixer-preamplifiers with dual 4-12 GHz IF outputs. The sideband-separating mixers are of the phasing type, with the LO driving two component mixers in-phase and the RF signal connected to the mixers through a quadrature hybrid. The IF outputs of the mixers are amplified, then combined in a quadrature hybrid which separates the ...

In this paper we discuss the stability of heterodyne terahertz receivers based on small volume NbN phonon cooled hot electron bolometers HEBs . The stability of these receivers can be broken down in two parts: the intrinsic stability of the HEB mixer and the stability of the local oscillator LO signal injection scheme. Measurements show that the HEB mixer stability is limited by gain fluctuatio...

In this paper, a low voltage low power up-conversion mixer, designed in a Chartered 0.18 μm RFCMOS technology, is proposed to realize the transmitter front-end in the frequency band of 2.4 GHz. The up-conversion mixer uses the current mirror topology and current-bleeding technique in both the driver and switching stages with a simple degeneration resistor. The proposed mixer converts an input o...

CMOS Scaling technologies are the main caused for great impact on Analog design. The most severe affect is the reduction in the voltage supply. A double balanced down conversion oscillator mixer using 90 nm CMOS technology is proposed in this work. This oscillator mixer consists of an individual mixer stacked on a voltage-controlled oscillator (VCO). The proposed stacked structure allows entire...

The Mix/Bix family of Pax-like homeodomain transcription factors is expressed early in vertebrate development and play important roles in endoderm and mesoderm formation. Like other Pax-related homeodomain proteins, the Mix/Bix family binds DNA as monomers or dimers and dimerization is mediated by the homeodomain. While the Mix/Bix family shares extensive sequence homology within the DNA-bindin...

This paper will describe the design and testing of solid-state subharmonically-pumped mixers from 380 GHz to 640 GHz. The main goal has been to develop robust, compact, solid-state room-temperature receivers with state-of-the-art sensitivity and broad IF bandwidths for applications such as airborne and space-based microwave sounding. Testing of a 380 GHz integrated mixer has yielded state-of-th...