In Indonesia, the majority of blindness cases, approximately 81%, are attributed to cataract. Additionally, 35% of the population has higher cholesterol levels than the standard normal range. The lack of specialized m...
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Cathode emission in most vacuum electronic devices (VEDs) operates in a space-charge limited regime where the current density drawn is limited by the self-fields of the space charges. In particle-in-cell (PIC) simulat...
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This paper describes a new metric for land use estimation based on two indicators: the Anthropentropy Factor, which expresses the impact of anthropic settlements on wild nature, and the Forest Status Quality, which me...
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作者:
Yau, Yeu-TorngDepartment of Ph.D. Program
Prospective Technology of Electrical Engineering and Computer Science National Chin-Yi University of Technology Taichung No.57 Sec. 2 Zhongshan Rd. Taiping Dist Taichung41170 Taiwan
To provide a hold-up time function in DC-DC supplies for cell site stations or data centers, using a boost converter with a bulk output capacitor as a front-end converter stage is a simple and highly cost-effective so...
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Implantable electrodes have raised great interest over the last years with the increasing incidence of neurodegenerative disorders. For brain implant devices, some key factors resulting in the formation of glial scars...
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In pregnancy, diabetes is known to increase the risk of adverse maternal and neonatal outcomes. It would be beneficial to find techniques that allow early investigation of the physio-pathological mechanisms involved t...
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We demonstrate that visible-wavelength transient absorption microscopy, which utilizes femtosecond laser pulses to measure sub pico-second excited state relaxation mechanisms of electron transport chain (ETC) hemeprot...
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This research introduces a novel dual-pathway convolutional neural network (DP-CNN) architecture tailored for robust performance in Log-Mel spectrogram image analysis derived from raw multichannel electromyography sig...
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This paper proposes a novel switch implementation for enabling transmitting and receiving (TX/RX) through one single wire in ultrasound imaging transceivers. The proposed structure consists of a resistor and two curre...
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ISBN:
(数字)9798350377200
ISBN:
(纸本)9798350377217
This paper proposes a novel switch implementation for enabling transmitting and receiving (TX/RX) through one single wire in ultrasound imaging transceivers. The proposed structure consists of a resistor and two current sources controlled by a DC loop. This implementation allows driving the primary switch with the low-voltage (LV) power supply available for the transceiver front-end, while providing isolation to the front-end from the high-voltage (HV) pulses required for driving the transducer in TX mode. Furthermore, by employing a DC control loop, the design not only ensures off-isolation, but also allows having zero leakage current. The proposed TX/RX switch has been designed in a 160-nm bipolar-CMOS-DMOS silicon-on-insulator (BCD-SOI) technology with a 3.3-V supply voltage. Simulation results of the proposed structure confirm its effectiveness in achieving isolation voltages of up to 200 V peak-to-peak at 3-MHz operational frequency with -42-dB off-isolation.
Frequency multipliers are key components for signal generation above 100 GHz. Push-push frequency doublers are popular but suffer from low conversion gain and limited fundamental rejection. Mixers with quadrature inpu...
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ISBN:
(数字)9798350359473
ISBN:
(纸本)9798350359480
Frequency multipliers are key components for signal generation above 100 GHz. Push-push frequency doublers are popular but suffer from low conversion gain and limited fundamental rejection. Mixers with quadrature inputs offer higher gain and better fundamental suppression but need a bandwidth-limiting 90° phase shifter. This work leverages Gilbert-cells mixers driven by in-phase signals but operated at a reduced duty-cycle (δ), allowing to retain the superior conversion gain and fundamental rejection without the 90° phase shifter. A simple low-frequency loop controls δ and gives maximum conversion gain by suppressing the output DC component. The signal driving the mixer switching-quad is generated and routed by a transmission-line network which compensates for the undesirable phase shift introduced by transistors parasitics, critical in the sub-THz band. Realized in SiGe BiCMOS, the circuit proves P
out
= 6.5 dBm at 148 GHz with 7.4% power efficiency and 8 dB conversion gain. With -3 dB bandwidth of 125 - 170 GHz, P
out
> 0 dBm from 110 to 170 GHz and a fundamental rejection always above 40 dB, the frequency doubler compares favorably against previous works.
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