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Internal and marginal discrepancies of monolithic zirconia, polymer infiltrated ceramic, and lithium disilicate crowns: an in vivo study. [PDF]
Braz Dent JMiranda LM +6 more
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Digital-LDO Switched Capacitors based for 0.5V applications
2020 32nd International Conference on Microelectronics (ICM), 2020This work presents the design of a 0.5V digital low dropout voltage regulator (DLDO) in 180nm CMOS technology for Dynamic Voltage Scaling applications. Dynamic and leakage power consumption in VLSI systems are effectively reduced by ultra-low voltage operation, being that the maximum energy efficiency is achieved at supply voltage below 0.5V.
Thiago Alves Mendes do Amaral +2 more
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Time-based Digital LDO Regulator
2019 31st International Conference on Microelectronics (ICM), 2019This paper presents a digital LDO (DLDO) regulator utilizing a time-based comparator rather than a voltage-based comparator in order to exploit the advantages of time domain and produce a more robust regulator. The time-based comparator compares between the reference and the load voltage levels and generates a digital bit that turns on/off the PMOS ...
Leen Qasem +3 more
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Embedded hybrid LDO topologies for digital load circuits
2016 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), 2016Digital low dropout voltage regulators provide digital process synthesiz ability, fast transient response and performance adaptation but lack steady state voltage regulation performance. To overcome this lack of steady state accuracy due to limit cycle oscillations, a hybrid low dropout voltage regulator topology designed in 130 nm CMOS process is ...
Saad Bin Nasir, Arijit Raychowdhury
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Digital LDO modeling for early design space exploration
2016 29th IEEE International System-on-Chip Conference (SOCC), 2016Digital low dropout (LDO) voltage regulators have been widely used in the latest low-power circuits that involve fine-grain power management. Due to the mixture of discrete- and continuous-time operation as well as the nonlinear comparator gain, it is difficult to derive the closed-loop transfer function for a digital LDO.
Stefan Leitner +3 more
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Ratioed Logic Comparator-Based Digital LDO Regulator
2020The proposed wearable biomedical device as given in Fig. 1.12 includes analog and noise sensitive blocks that should be supplied by LDO regulator in order to support a clean and a low voltage ripple. LDO regulators are widely utilized in PMU as they provide fast response, small area, and full integration. However, with the increase of process variation
Dima Kilani +4 more
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Fully digital fast transient phase-locked digital LDO-embedded-MDLL for DVFS applications
Analog Integrated Circuits and Signal Processing, 2017This paper presents a multiplying delay-locked loop (MDLL) embedded with a frequency-only reference (FREF) based fully digital low-dropout regulator (DLDO) that outperforms conventional dynamic voltage and frequency scaling circuits when driving digital-load circuits that operate down to the near-threshold voltage level . We also propose a feed-forward
Muhammad Abrar Akram, In-Chul Hwang
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Digital LDO Based Power Signature Generation Circuit for IoT Security
2020 IEEE 63rd International Midwest Symposium on Circuits and Systems (MWSCAS), 2020Power analysis or power fingerprinting has been demonstrated as a potent tool to detect malicious operation or adversary attacks. However, current methods to extract power traces for power analysis typically require bulky and power hungry equipment, which prevents integrating power analysis methods in IoT devices.
David E Thompson +2 more
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A Three-Stage Coarse-Fine-Tuning Analog-Assisted Digital LDO
Journal of Circuits, Systems and Computers, 2020This paper proposes a three-stage coarse-fine-tuning analog-assisted digital low dropout regulator (AAD-LDO) without digital ripple. The digital regulation consists of two stages, which break the accuracy-speed-power trade-off. To further improve transient response, a step-variable counter used in the first stage is designed, which makes sure that the
Lianxi Liu +4 more
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A Sub-1V 0.18um Output-Capacitor-Free Digitally Controlled LDO
Applied Mechanics and Materials, 2015The new digital control loop of the low-dropout regulator (LDO) is presented. It is composed of coarse tracking circuit and fine tracking circuit, and no external output capacitor is required to stabilize the control loop. The proposed method makes the quiescent current lower than conventional analog LDOs.
Wei Bin Yang +2 more
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