A wideband low-noise amplifier (LNA) featuring transformer-based input matching is proposed for millimeter-wave applications. By analyzing the properties of conventional series networks, which were widely employed in narrowband LNAs and shunt-series networks bandwidth extension, a novel network possessing merits both was proposed. For further another peak impedance at higher frequency introduced network. Moreover, it proved that can suppress gate resistor noise, resulting significant noise...

This paper presents a 4-path LO generation system with automatic phase tuning for 60 GHz phased-array receivers. Each path employs linear phase-shift chain composed of an injection-locked-oscillator-based shifter cascaded injection-locked frequency tripler. The tripler proposed locking-range enhancement technique is employed to relax both the and shift high linearity low power. Finally, novel successive-approximation algorithm perform detection tuning. Fabricated in 65 nm CMOS process...

Indoor localization is the fundamental capability for indoor service robots and applications on mobile devices. To realize that, cost of sensors great concern. In order to decode signal carried out by LED beacons, we propose two reliable solutions using common available consumer electronic Firstly, introduce a dedicated analog sensor, which can be directly connected microphone input computer or smart phone. It decodes both pattern strength beacon. Secondly, utilize rolling-shutter cameras...

This paper presents the design and characterization of first active matrix light-emitting diode (AMLED) microdisplay with an embedded visible light communication (VLC) transmitter, enabling LED digital signage for location-based applications such as information broadcasters indoor positioning beacons. The driver system-on-a-chip (SoC) integrates four identical macro-cells, each containing a pixel array, row driver, column first-in first-out memory, to drive wide quarter-VGA (WQVGA) display...

This paper presents, for the first time, a systematic approach to visible light communication (VLC) transceiver design based on an analytical optical wireless link budget study. To obtain signal-to-noise ratio at receiver, received signal power is predicted by modeling transmitted and channel path loss, while input-referred noise estimated characterizing contribution from each of receiver building blocks. Based targeted bit error rate (BER) distance, VLC using discrete components fully...

This paper presents an IEEE 802.15.7 Physical Layer I (PHY-I) standard compliant visible light communication (VLC) transmitter system-on-a-chip (SoC), enabling the use of ordinary white LED lights as beacons or broadcasters for location-based applications. The mixed-signal SoC integrates a baseband digital signal processing (DSP) unit, VLC modulator, and switching boost driver with on-chip power MOSFET. DSP unit supports various coding schemes well both on-off keying (OOK) modulation...

This paper presents a new transformer-feedback technique for RF and millimeter-wave (mmW) low-noise amplifiers (LNAs). The working principle of conventional LNAs using transformers is analyzed to show their underlying performance trade-off between input matching noise figure (NF). To mitigate this issue, feedback developed by constructing drain-to-gate path around the transistor with transformer then further demonstrated two LNA prototypes. In first aiming software-defined radio (SDR)...

A wideband low-noise amplifier (LNA) with low and flat noise figure (NF) is presented in this article. For conventional matching, the performance high-frequency region of entire usually deteriorated due to frequency-dependent nature minimum (NF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">min</sub> ) for a MOSFET. To address issue, novel matching approach aiming at high band proposed. This can reduce NF cost slight increase band, eventually...

A 4-element 60-GHz phased-array receiver RF front-end (RFE) employing LO-path phase-shifting configuration is presented. wide bandwidth from 57 to 66 GHz achieved by using multiple design techniques, including wide-band input matching network on-chip baluns, peak-frequency staggering in the LNAs, and resonant-frequency tuning of LC load first down-conversion stages. Furthermore, beamforming calibration implemented sequentially performing gain equalization, I/Q successive-approximation phase...

A novel phase-noise-filtering technique based on phase-domain averaging is proposed to suppress the large injection spurs and poor high-frequency phase noise of inductor-less injection-locked phase-locked loops (IL-PLLs). Demonstrated using a 1.2-GHz fractional-N IL-PLL capacitive-ring-coupled ring oscillator, wideband spur-and-phase-noise suppression up 20 dB achieved allowing for as low -146 dBc/Hz at 30-MHz offset with 2-MHz resolution. This allows an alternative LC-based PLLs in...

In the extant literature of business cycle predictions, signals for turning points are generally issued with a lag at least 5 months. this paper, we make use novel and timely indicator—the Google search volume data—to help to improve timeliness point identification. We identify multiple query terms capture real‐time public concern on aggregate economy, credit market, labor market condition. incorporate indices in Markov‐switching framework successfully “nowcast” peak date within month that...

This paper presents an injected-locked THz radiator integrating a half-quadrature voltage-controlled oscillator (HQVCO), four injection-locked frequency quadruplers (ILFQs), and chip-and-package distributed antenna (DA). At the system level, architecture based on injection locking is employed to allow individual optimization of output power phase noise. circuit intrinsic-delay compensation harmonic boosting techniques are proposed optimize noise HQVCO ILFQs, respectively. The DA composed...

This paper presents a modified post-distortion (PD) linearization technique for cascode common-gate low noise amplifiers (CG-LNAs) working at high frequencies up to millimeter-wave band. utilizes an auxiliary transistor together with inter-stage inductor suppress the third order distortion without degrading gain. The input intercept point (IIP3) of linearized CG-LNA is improved by factor 12 dB. For demonstration, mm-wave differential was fabricated based on 65-nm CMOS process. It achieves...

A locking-range enhancement technique is proposed for divide-by-4 injection-locked frequency dividers (ILFDs) at millimeter-wave frequencies. The working principle of the conventional ILFDs analyzed and verified with simulations to show that limited locking range mainly attributed low efficiency harmonic mixing. Based on observation, an developed by employing a properly-designed 4th-order LC tank boost 3rd-order tone output increase injection thus range. Implemented in 65-nm CMOS process,...

A novel inverter-based transimpedance amplifier (TIA) employing shunt-shunt inductive feedback and input series peaking is implemented in 65-nm CMOS for 100 Gbit Ethernet (100 GbE) receivers. The multiple scheme provides an overall bandwidth enhancement ratio of 2.8 to deliver 42-dBQ gain up 24 GHz. To suppress the wideband noise from TIA power supply alleviate loading effect due bond-wires, a low-dropout regulator (LDO) with full-spectrum rejection (PSR) at least -12 dB co-designed...

This communication presents a substrate integrated waveguide (SIW) switched beam antenna operating at 2.45 GHz. The design allows the to be between six discrete directions giving 360° coverage. switch control is achieved using only four PIN diodes that are directly structure allowing its nature electrically controlled. no bigger than single SIW slot although perpendicular reflector used. shown in good agreement with simulated results achieving measured gains 3 and 6 dBi.

This brief presents a digitally-controlled inductor (DCI) technique to tune the frequency of millimeter-wave (MMW) voltage controlled oscillators (VCOs). The design guideline, which is structure larger coupled when obtaining required inductance, derived optimize quality factor. To extend tuning range and minimize Q degradation, DCI composed primary coil two switched secondary coils designed proposed. Switching on off, individually, effective inductance seen from for LC oscillation varied....

A bimodal enhanced-magnetic-tuning technique is proposed to extend the frequency tuning range of millimeter-wave (mmW) quadrature VCOs (QVCOs). First, conventional magnetic reviewed, and its limitations for at mmW frequencies are high-lighted. To enlarge variable field, a new transformer-based topology called (EMT) analyzed. In addition, by switching polarity phase shift coupling currents, both two intrinsic modes in VCO exploited ideally double range. With generic model, (B-EMT) analyzed...

This paper presents the first IEEE 802.15.7 PHY-I standard compliant visible light communication (VLC) transmitter and LED driver SoC for location-based applications using white lights as beacons or broadcasters. Implemented in a 0.35μm CMOS process with 20-V high-voltage device, mixed-signal integrates baseband DSP unit, VLC modulator, switching boost converter an on-chip power MOSFET. Designed to drive array of up 4×5 LEDs batteries, generates output at 6-20 V from input 3-5V 92% peak...

A rotated-phase-tuning (RPT) technique is proposed for millimeter-wave (mmW) LC-based oscillators. Without using varactors, the oscillation frequency tuned by phase interpolation to vary of current flowing into LC tank. Interestingly, intrinsic delay transistors leveraged rotate phases and thus optimize oscillator's performance in terms tuning range noise. Two E-band RPT oscillator prototypes are designed implemented a 65-nm CMOS process. The first one with four-phase output measures from...

This brief presents a 15–38 GHz vector-summing phase shifter (VSPS) with the full 360° phase-shifting range in 65nm CMOS process. An improved wideband quadrature all-pass filter (QAF) is designed to overcome traditional one's capacitive loading effect and exhibits I/Q performance. Analysis comparison between proposed QAF one are discussed. For demonstration, prototype VSPS from 15GHz 38GHz using implemented The root means square (RMS) gain errors 2°~3.5° 0.7 dB ~1 15 38 GHz, respectively....

A wideband low noise amplifier (LNA) operating within 11.8-37.2 GHz for 5G multi-band application is presented. Based on the topology of current reusing common source and (CS-CS) stages, proposed LNA demands less dc power achieves gain input matching simultaneously by reactive transformer feedback (S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> <; -12dB). Meanwhile, owing to Gm-boosting technique, shows maximum S...