Zero-IF receiver has some advantages, such as small factor, low cost and easily integrated on a chip. They make it competitive of RF receivers. However, DC Offset and flicker noise, etc., have profound effects in zero-IF receiver, which need not be considered in super-heterodyne receiver. Following a major study of flicker noise, possible solutions are given, especially those based on the passi...

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...

res of SIS receivers now in the range 2-4 times the ), the overall sensitivity of radio astronomy sly degraded by atmospheric noise, and sometimes by cillator source. In spectral line measurements, wanted (image) sideband can be eliminated by using an o reduce local oscillator noise, balanced mixers can ealize image separating and balanced mixers using RF circuits, but they are difficult to fab...

A low-voltage and low-power RF mixer for WCDMA applications is presented. The paper presents a novel topology mixer that leads to a better performance in terms of isolation and power consumption for low supply voltage. The measuring results of the proposed mixer achieve: 7dB power conversion gain, 10.4dB double side band (DSB) noise figure, -2dBm input third-order intercept point (IIP3), and th...

Measurements of the frequency stability of a far-infrared molecular laser have been made by mixing the harmonic of an ultrastable microwave source with a portion of the laser output signal in a terahertz (THz) Schottky diode balanced mixer. A 3 GHz difference-frequency signal was used in a frequency discriminator circuit to lock the laser to the microwave source. Comparisons of the short- and l...

We developed a confocal microscopic method for a quantitative evaluation of the mixing performance of a three-dimensional microfluidic mixer. We fabricated a microfluidic baker's transformation (MBT) mixer as a three-dimensional passive-type mixer for the efficient mixing of solutions. Although the MBT mixer is one type of ideal mixers, it is hard to evaluate its mixing performance, since the...

This paper describes a 1.5-V 5 GHz I/Q down conversion mixer in a 0.18-μm CMOS process. The mixer achieves a conversion gain of 12.7 dB within 1-dB compression point (iCP1dB) of -15.83 dBm. It also achieves a double side band (DSB) NF of 13.5 dB. The mixer's IIP3 is -5.94 dBm. The mixer consumes only 5.72 mA of current from a 1.5-V power supply. Key-Words: Analog RF-CMOS, IEEE 802.11a, IEEE 802...

This paper reports a novel MMIC balanced sub-harmonic cold FET mixer for MVDS applications using 0.15mm GaAs pHEMT. The mixer, which includes a LO buffer amplifier, was optimized for highly linear upconversion performance in the 42-43.5GHz RF band, 19.520.5GHz LO band and 2.45-3.45 GHz IF band. A dedicated simulation method has been developed to optimize conversion loss and determine optimum ma...