Energy Efficiency

TxACE is committed to alleviate the global energy problem by improving the energy efficiency of electronic systems as well as by developing analog technologies that can make energy generation and distribution more efficient. The Center is also working to energize and power long-lasting in-situ microscale devices such as wireless microsensors, biomedical implants, and portable microelectronics.

Figure 1. (Top left) Simulated flux leakage in a motor (B. Akin, UT-Dallas), (Top center) Dynamic BIST for LDO’s (S. Ozev, Arizona State U.), (Top right) BER versus SNR for PLC/Wireless receiver combining techniques based on maximal-ratio-combining that take into account the impulsive nature of noise on the two links (N. Al-Dhahir, UT-Dallas, B. Evans, UT-Austin), (Bottom left) Microprocessor and switched-capacitor DC-DC converter power management unit based on direct error regulation (M. Seok, Columbia U.), (Bottom center) Resonant converter for isolated power transfer (B. Ma, UT-Dallas), (Bottom right) Simulated cross-sectional temperature distribution in a 8-row TSV arrangement (J. Lee, N. Bagherzadeh, UC-Irvine).

Energy Efficiency Thrust



Category Accomplishment
Energy Efficiency (Circuits) High-speed serial link receiver design and modeling techniques are proposed to significantly improve interconnect bandwidth density in an energy-efficient manner. A statistical link modeling tool was utilized to investigate the optimal equalization partitioning and modulation format for 60+Gb/s signaling environments. A dual-mode NRZ/PAM4 SerDes was implemented in GP 65-nm CMOS and achieved 16Gb/s NRZ and 32Gb/s PAM4 operation
Energy Efficiency (Circuits) Techniques to improve the rate, reliability, and energy efficiency of two-way between smart meters & data concentrators in smart grids using both narrow band power line communication (NB-PLC) and wireless communication are proposed. The narrowband (NB)-PLC/Wireless receiver diversity techniques improves the performance by exploiting the statistics of the impulsive noise in PLC. A new cyclostationary model for the NB-PLC noise based on frequency-shift (FRESH) filtering can be used to improve SNR by ~4dB. (1836.133, PIs: N. Al-Dhahir, UT-Dallas and B. L. Evans, UT-Austin)
Energy Efficiency (Circuits) This project explores the circuit architecture and operation scheme for achieving highly power efficient on-silicon AC-DC power conversion in environmental sensor applications that is resilient to ground voltage disturbance. Capacitive isolation eliminates the bulky magnetics. However, the low density on-chip capacitor and large parasitics limit the output power level and efficiency. A resonant-based circuit architecture for power isolation with the peak power efficiency of 50.7% and the maximum output power of 62mW is demonstrated. This design achieves a 4X efficiency and a 3X power delivery improvement over the prior art.
(1836.146, PI: Brian Ma, UT-Dallas)