This paper presents a passive mixer combined with a 1st-order active low-pass filter implemented in a purely digital low-power 65 nm CMOS technology. The filter consists of a four-stage operational amplifier with two feed-forward paths for a 3 dB corner frequency of 4 MHz. The mixer offers a very low flicker noise corner frequency of 80 Hz for DVB-H application. A fabricated test chip with inte...

The 23rd and 31st harmonics of a microwave signal generated in a novel THz balanced Schottky diode mixer were used as a frequency stable reference source to phase lock solid-nitrogen-cooled 2.324 and 2.959 THz quantum cascade lasers. Hertz-level frequency stability was achieved, which was maintained for several hours.

In microfluidics mixing of different fluids is a highly non-trivial task due to the absence of turbulence. The dominant process allowing mixing at low Reynolds number is therefore diffusion, thus rendering mixing in plain channels very inefficient. Recently, passive chaotic micromixers such as the staggered herringbone mixer were developed, allowing efficient mixing of fluids by repeated stretc...

This paper describes a 1.5-V 2.4-GHz silicon down conversion mixer with a CMOS gm Cell using 0.35 um process [1]. With a 2.3-GHz local oscillator (LO) and a 2.4-GHz RF input, the mixer minimum double sideband noise figure (DSB NF) is 8.9 dB. The input third-order intercept point (IIP3) is 0.5 dBm, and the power conversion gain is 18 dB.

Two novel passive micromixers, denoted as the Y-Y mixer and the H-C mixer, based on split-and-recombine (SAR) principle are studied both experimentally and numerically over Reynolds numbers ranging from 1 to 100. An image analysis technique was used to evaluate mixture homogeneity at four target areas. Numerical simulations were found to be a useful support for the design phase, since a general...

We report the development of a low noise and broadband SIS mixer aimed for 1 THz channel of the Caltech Airborne Submillimeter Interstellar Medium Investigations Receiver (CASIMIR), designed for the Stratospheric Observatory for Far Infrared Astronomy, (SOFIA). In the SIS mixer are used the Nb/AlN/NbTiN junctions with the Josephson critical current density of about 40 KA/cm . The mixer is built...

If you have a home-built receiver or transceiver for the amateur bands—or even manufactured equipment—that has proven weak in the front end, this article is for you. You could consider adding a band-pass filter at the input, which is desirable1 for second-order IMD protection; but it will not necessary help the third-order IMD, measured as third-order intercept point or IP3. That is the figure ...