In this paper a low-power low-phase-noise voltage-controlled-oscillator (VCO) has been designed and, fabricated in 0.25μm SiGe BiCMOS process. The resonator of the VCO is implemented with on-chip MIM capacitors and a single aluminum bondwire. A tail current filter is realized to suppress flicker noise up-conversion. The measured phase noise is −126.6 dBc/Hz at 1 MHz offset from a 7.8 GHz carrie...

The accuracy of photometric redshifts (photo-zs) particularly affects the results analyses galaxy clustering with photometrically-selected galaxies (GCph) and weak lensing. In next decade, space missions like Euclid will collect measurements for millions galaxies. These data should be complemented upcoming ground-based observations to derive precise accurate photo-zs. this paper, we explore how...

Sodium iodide crystal co-doped with thallium and lithium is a promising scintillator wide application prospects for dual gamma neutron detection. In this study, compact gamma/neutron detector was developed based on 2-inch NaI(Tl+Li) (NaIL) readout 8 × silicon photomultiplier (SiPM) array. Dedicated transimpedance amplifier circuit the SiPM The energy resolution response linearity array were eva...

A highly sensitive terahertz (THz) waveguide resonance biochemical sensor is designed and simulated. The consists of a silicon prism, dielectric layer nanoporous gold film. film acts as both THz waveguiding molecular enrichment layer, which can enhance the interaction between mode adsorbed molecules, consequently improving sensor’s sensitivity. When transverse electric (TE) or magnetic (TM) mod...

We present a low-power Σ − ∆ modulator to be used in the baseband sections of wireless sensor network receivers with 0.65V Vdd operation. The design is optimized for low-power consumption and low operating supply by minimizing operational amplifier open-loop gain. Simple differential pair amplifiers with ≈ 40dB of open loop gain and low noise factor are employed as the integrator cores and guar...

A new CMOS LC Voltage Controlled Oscillator (VCO) for IEEE 802.11a application with low phase noise and consumed power less than 1mW is presented. This circuit was taped out by TSMC 0.18um 1P6M process. The measured phase noise is -115-88dBc/Hz at 1MHz offset at the operation frequency of 5.815GHz. And the dc core current consumption is 0.71mA at a supply voltage of 1.4 V. Its figure of merit (...

Ultrasound is a widely used medical imaging technique used for diagnostic purposes. But the major problem with these images is that they are inherently corrupted by speckle. The presence of speckle severely hampers the interpretation and analysis of medical ultrasonic images. In this paper, a comparison of various speckle reducing spatial and wavelet based methods has been carried out while de-...

A plasmonic refractive index (RI) sensor based on metal-insulator-metal (MIM) 11 waveguide coupled with concentric double rings resonator (CDRR) is proposed and investigated 12 numerically. Utilizing the novel supermodes of the CDRR, the FWHM of the resonant wavelength 13 can be modulated, and a sensitivity of 1060 nm/RIU with high figure of merit (FOM) 203.8 is realized 14 in the near-infrared...

HarkMan keyword-spotter was designed so that it can be used in a real-world environment to automatically spot the given words of a vocabulary-independent (VIND) task in unconstrained Chinese telephone speech. In this spotter, the speaking manner and the number of keywords are not limited. This paper focuses on a novel technique that addresses acoustic modeling, keyword-spotting network, search ...