A PLDRO (Phase Locked Dielectric Resonator Oscillator) with the output frequency of a fractional multiple of reference is proposed and implemented. The key element in the proposed PLDRO is an image rejection mixer placed between a VCDRO (Voltage Controlled Dielectric Resonator Oscillator) and SPD (Sampling Phase Detector). The image rejection mixer shifts the coupled signal from the VCDRO befor...

Abstract This paper studies how nonlinear distortion is generated in the combination of an inverter-based low-noise amplifier and a passive mixer. The dominant nonlinearity appears to be quadratic $$V_{gs}V_{ds}$$ V gs ds mixing t...

This review reports the progress on the recent development of micromixers. The review first presents the different micromixer types and designs. Micromixers in this review are categorized as passive micromixers and active micromixers. Due to the simple fabrication technology and the easy implementation in a complex microfluidic system, passive micromixers will be the focus of this review. Next,...

A highly integrated Ka band front-end receiver is presented. The proposed front-end receiver is developed for a Ka band passive imaging system. The design adopts single-stage heterodyne architecture at 2 GHz intermediate frequency (IF). Further, a two-layer planar technology is adopted for compact realization. The top layer of the front-end comprises of two monolithic microwave integrated circu...

The effects of pH and chloride concentration on the electrochemical corrosion of copper in aqueous sodium chloride (NaCl) media were studied at the micro scale using a microcapillary droplet cell and at the macro scale using a conventional large scale cell. Using an experimental design strategy, electrochemical response surface models of copper versus pH and NaCl concentration were constructed ...

We report a color tunable display consisting of two passive-matrix micro-LED array chips. The device has combined vertically stacked blue and green passive-matrix LED array chips sandwiched by a transparent bonding material. We demonstrate that vertically stacked blue and green micro-pixels are independently controllable with operation of four color modes. Moreover, the color of each pixel is t...

In this article, we present a passive mixer-first receiver front end providing low-power integrated solution for high interference robustness in radios targeting Internet-of-Things (IoT) applications. The employs novel N-path filter/mixer, linear baseband amplifier, and step-up transformer to realize sub-6-dB NF >20-dBm OB-IIP3 concurrently. proposed filter/mixer exploits an implicit capacitive...

A passive CMOS downconversion mixer with LO buffer is presented in 0.25 mm SiGe BiCMOS using a 2.5 V supply. With a 60 MHz RF signal input, measurements show that the conversion loss is 2.9 dB, the input-referred 1 dB compression point is 20 dBm and the inputreferred noise is 2146.8 dBm/Hz. Compared to conventional NMOS mixers, the 1 dB compression point is improved by 9.7 dB. The tradeoffs and...

The creation of complex three-dimensional (3D) microfluidic systems has attracted significant attention from both scientific and applied research communities. However, it is still a formidable challenge to build 3D microfluidic structures with arbitrary configurations using conventional planar lithographic fabrication methods. Here, we demonstrate rapid fabrication of high-aspect-ratio microflu...