A5033881453- Energy Harvesting in Wireless Networks
- Radio Frequency Integrated Circuit Design
- Innovative Energy Harvesting Technologies
- Advanced Thermoelectric Materials and Devices
- Advanced Power Amplifier Design
- Low-power high-performance VLSI design
- PAPR reduction in OFDM
- Microwave Engineering and Waveguides
- Advancements in Semiconductor Devices and Circuit Design
- Analog and Mixed-Signal Circuit Design
Cypress Semiconductor Corporation (United States)
2017-2019
Analog Devices (United States)
2015-2017
Texas A&M University
2014-2017
KU Leuven
2012
A digital outphasing transmitter is presented for 2.4-GHz WiFi. The consists of two delay-based phase modulators and a 26-dBm integrated switching class-D power amplifier. modulator delays incoming LO edges with resolution 1.4 ps (8 bit) required to meet WiFi requirements. MUX architecture proposed implement between phases once every period (2.4 GHz) without generating detrimental glitches at the output. Due its open-loop nature, capable delivering wide OFDM bandwidths up 40 MHz. paper...
This paper presents an on-chip, low drop-out (LDO) voltage regulator with improved power-supply rejection (PSR) able to drive large capacitive loads. The LDO compensation is achieved via a custom, wide bandwidth capacitance multiplier (c-multiplier) that emulates nanofarad-range at the output node. frequency response resembles of externally compensated LDOs, leading PSR range without using off-chip capacitor. To loads stability concerns, supply-line load circuit incorporated design scheme....
Wireless transmitters (Tx) targeting Internet-of-things (IoT) applications impose tough end-to-end efficiency requirements. The frequency synthesis problem is usually solved by incorporating a variant of the phase-locked loop. However, power-hungry dividers and large loop time constants hurt aggregated Tx power consumption produce systems with slow start-up turnaround times, particularly when operating at low output power. This paper demonstrates an agile ultralow energy-efficient...
A high efficiency, maximum power point tracking (MPPT) management unit (PMU), with 3.6 \mmbμW quiescent power, aimed at a thermoelectric generator (TEG) array is presented. The proposed energy harvesting PMU made up of boost converter cascaded capacitor-less low drop-out (CL-LDO) voltage regulator. segmented approach allows the to match TEG array's changing dynamic series resistance via and simultaneously provide regulation adaptive, switching noise rejection CL-LDO. converter's frequency...
This paper introduces a low-power wireless RF receiver for the sensor network. The has improved linearity with incorporated current-mode circuits and high-selectivity filtering. operates at 900-MHz industrial, scientific, medical band is implemented in 130-nm CMOS technology. frequency multiplication mixer, which uses 300-MHz clock from local oscillator (LO). LO using vertical delay cells to reduce power consumption. conversion gain 40 dB noise figure 14 dB. receiver's input third-order...
A high efficiency, dynamically adaptable Power Management Unit (PMU) consuming less than 3μW, for an energy harvesting system based on a thermoelectric generator (TEG) array is presented. boost converter with cascaded low drop-out (LDO) voltage regulator comprises the proposed PMU. The design approach allows PMU to reach maximum power transfer by matching TEG's dynamic series resistance and simultaneously provide adaptive switching noise rejection. converter's frequency (f <sub...