A5100724275- Radio Frequency Integrated Circuit Design
- Advanced Power Amplifier Design
- Low-power high-performance VLSI design
- Analog and Mixed-Signal Circuit Design
- Advanced Battery Technologies Research
- Fuel Cells and Related Materials
- Risk and Safety Analysis
- Wireless Power Transfer Systems
- Fault Detection and Control Systems
- Matrix Theory and Algorithms
- Healthcare Technology and Patient Monitoring
- Reliability and Maintenance Optimization
- Electromagnetic Simulation and Numerical Methods
- Advancements in Semiconductor Devices and Circuit Design
- Healthcare Operations and Scheduling Optimization
- VLSI and Analog Circuit Testing
Fudan University
2024
Jinan University
2024
Southern Methodist University
2021-2023
Xidian University
2023
Waseda University
2008
In Class-D audio amplifiers (CDAs), nonlinearity of power stages and pulse-width-modulation (PWM) modulators poses a main challenge in pursuit high-fidelity output. The distortion is typically suppressed by closed-loop topology with high inband loop gain [1, 2]. However, due to the roll-off gain, total harmonic plus noise (THD+N) CDA tends increase at frequency. Another source arises from aliasing high-frequency PWM residuals, which limits minimum THD+N [3]. Although this can be improved...
It was originally stated that convolution operations were required to implement adjoint sensitivity in the time domain. In this article, we revisit time-domain with a circuit theoretic approach and an efficient solution is clearly terms of device level. Key linearization energy storage elements (e.g., capacitance inductance) nonlinear memoryless MOS, BJT DC characteristics) at each step. Due finite precision computation, numerical errors accumulate across timesteps can arise elements. A...
Using the 10W GaN HEMT CGH40010F from CREE, a high-efficiency and compact power amplifier (P A) is designed for 5G application. A novel output matching network (OMN) which absorb part of bias circuit suppress harmonics simplified layout performance. The PA has size 45 mm×20 mm. Simulation results show that added efficiency (PAE) ranges 57.32% to 60.61% at 2-dB compression saturated 40.59 40.92 dBm are obtained within frequency band 3.3-3.7 GHz.
In the recent years, as aging society becomes serious in Japan, people, especially those health industry, focus on improvement of healthcare. Due to unsuitable algorithm out-patient appointment systems, patients always complain about long waiting-times. Because this, it is necessary re-build system reduce this paper, current method will be discussed, and data analyzed using statistic methods. By analyzing result, a proposed may able waiting-time.
Step-function excitations are convenient abstractions for circuit turn on/off and switching activities in general. However, they ill-handled by SPICE-derived simulators that employ implicit integration approximations substitute steep ramps steps. An ACES-derived explicit method efficiently handles step-functions, manages potential instability, converges to the steady state. The resulting simulator can be employed find an initial state size excursion-limited accuracy control. It also is able...