A5101427250- Analog and Mixed-Signal Circuit Design
- Advancements in PLL and VCO Technologies
- Low-power high-performance VLSI design
- Advanced DC-DC Converters
- Advancements in Semiconductor Devices and Circuit Design
- Radio Frequency Integrated Circuit Design
- Silicon Carbide Semiconductor Technologies
- Semiconductor materials and interfaces
- Advanced optical system design
- Electrowetting and Microfluidic Technologies
- ECG Monitoring and Analysis
- Nanowire Synthesis and Applications
- Nanofabrication and Lithography Techniques
- Photovoltaic System Optimization Techniques
- Mechanical and Optical Resonators
- Energy Harvesting in Wireless Networks
- GaN-based semiconductor devices and materials
- Piezoelectric Actuators and Control
- Nonlinear Dynamics and Pattern Formation
- Semiconductor Quantum Structures and Devices
- Multilevel Inverters and Converters
- Microwave Engineering and Waveguides
- Neural Networks and Applications
- Innovative Energy Harvesting Technologies
- Advanced Sensor and Energy Harvesting Materials
Tiangong University
2025
Xi'an Jiaotong University
2007-2023
Huaqiao University
2010-2012
Institute of Microelectronics
2007
To explain the negative capacitance (NC) characteristic of multi-quantum-well (MQW) LEDs, we calculated continuity equation for a 10-period AlGaInP/GaInP LED with mesa size 90 × 150 μm and build an MQW capacitor model. The carrier concentrations capacitance–voltage characteristics across every quantum well region were analyzed by accounting spontaneous, Auger, SRH recombination. In our model, dynamic lifetime iteration method iterative error less than 1 10−14 ns was used to decouple electric...
Monolithic micro LED display arrays show potential for application in small-area modules, such as augmented reality (AR) displays. Due to the short distance between LEDs and monolithic transparent substrate, a light crosstalk phenomenon exists adjacent pixels, decreasing array's definition. In this paper, 64 × GaN array was fabricated on silicon-based drive circuit. The size 20 μm μm, pitch 28 μm. To suppress optical array, we etched photonic crystal structure using focused ion beam (FIB)...
Electrocardiogram (ECG) signals have the characteristics of low amplitude and frequency. A low-power, low-noise voltage amplifier is required for long term ECG monitoring. Chopping technique an efficient approach to decrease 1/f noise CMOS amplifiers, but conventional chopper consumes large power because it a wide-band exceed chopping frequency post low-pass filter modulation noise. Moreover, DC offset created by skin-electrode interface can reach as high ±100mV easily saturate amplifier,...
In order to effectively and flexibly control acoustic pattern, an efficient optimization design method of liquid lens (ALL) is developed by the frame particle swarm (PSO) algorithm. The ALL composed ethanol dimethicone, its parameters include concentration (EC), volume fraction dimethicone (VFD), total (TV). Based on established finite element model orthogonal method, data pattern can be obtained using COMSOL Multiphysics. simulation data, neural network models are constructed characterize...
Electro-optic (EO) sensors have a wide range of applications in power systems, but their output stability is significantly affected by temperature, limiting practical performance. To understand the temperature EO sensors, this article experimentally studies Bi4Ge3O12 (BGO) and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${z}$ </tex-math></inline-formula> -axis light-transmitting LiNbO3 (LN) at different...
This paper presents a fully differential low noise amplifier (LNA) and I/Q down-conversion mixers for 3-5 GHz multiband OFDM (MB-OFDM) UWB receivers. The LNA adopts capacitive cross-coupling common-gate (CG) topology to achieve wideband input matching figure (NF). Tuning technique is used in the double-balanced Gilbert mixer realize flat conversion gain whole band. Degeneration inductors are improve linearity. Designed 0.18 mum CMOS technology, achieves NF of 3.2-3.5 dB S11 less than -13 dB....
Current sensing is one of the most important functions on current mode DC-DC converters. A novel on-chip current-sensing technique, which suitable for a control Boost converter, presented. proposed circuit insert resistor in path to be sensed, it doesn't need an amplifier as voltage mirror, also can achieve high accuracy and fast response. The Circuit was designed based TSMC 0.35um CMOS process, Simulation results shows had 2.5V-5.5V power supply, simulation result that sample 96%.
This paper introduces a design of slope compensation circuit for peak-current-mode boost DC-DC converter. The is simple, and eliminates instability problem the system generated by double-loop control. And it avoided detrimental effects on account improper compensation, such as slow transient response, low carrying capacity. It improves stability switching power supply. implemented base TSMC's 0.35 μm CMOS process. spectre simulation results show that, when inductive current occurs...
To alleviate the folded noise caused by coefficient mismatches between two channels of two-channel time-interleaved (TI) ΣΔ modulators and simplify circuit modulators, a novel TI second-order modulator is proposed. A new type transfer function (NTF) which band-pass filter adopted for to reduce noise. The simulation results show that this insensitive channel mismatches. Moreover, only needs three operation amplifiers.
In this paper, a novel 2-3 two-stage fifth-order multi-bit cascade sigma-delta modulator (SDM) architecture is proposed for broadband applications. For low oversampling applications, in order to resolve the problem of sensitivity nonlinear and finite gain operational amplifier (op-amp) traditional SDM architecture, first stage employs second-order low-distortion SDM. While second single-loop third-order instead first-order or SDM, which can simplify analog circuit significantly. The noise...
Time-interleaved (TI) sigma-delta modulators are sensitive to channel-mismatches. In this paper, a new type of noise transfer function (NTF) which is band-pass filter adopted for the two-channel TI reduce folded noise. Employing concept block digital filtering and theory multirate operations, novel high-order modulator derived from prototype conventional single-channel modulator. The simulation results show that proposed insensitive channel mismatches.
In this paper, a novel single-loop high-order multi-bit sigma-delta modulator (SDM) architecture is proposed for broadband applications. This employs the technique of double-sampling to double sampling frequency SDM without increasing clock frequency. To reduce noise folded into signal band in SDM, an additional zero placed at half (fs/2) modulator's transfer function (NTF). A new simple circuit realize f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...