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This work is devoted to development of high-voltage low drop output (LDO) voltage regulator integrated circuit (IC) for power supply units. IC is realized in 250 nm BCD (Bipolar, CMOS, DMOS) mixed technology.
A low-dropout regulator (LDR) using a matching-enhanced error amplifier (ME-EA) and a multi-threshold-controlled unity-gain buffer (MTC-UGB) is proposed in this work. With the majority of transistors being high-voltage devices of the process, the regulator tolerates a high in put voltage range, which alleviates the reliability concern caused by low-voltage transistors. The ME-EA allows for tight line...
Ultra low-power electronic design is the backbone methodology tool in sensor integration architectures, sensor networking, biomedical applications and wearable electronics. These implementations demand multiple supply voltage domains with different current level requirements that vary from a few microamperes to hundred of miliamperes, such task is done by voltage regulators. This work studies the...
Switched-capacitor (SC) DC-DC converters have several advantages over inductive DC-DC converters in that they are easily integrated on-chip and can scale to desired power levels, rendering themselves promising for integrated voltage regulators, especially for small, low-power systems. However, many SC DC-DC converters offer only a few conversion ratios, limiting their use for systems in which either...
Full-swing voltage-controlled oscillators (VCOs) are very sensitive to supply noises and require supply regulators with increased supply voltages, which may entail more power consumption. Further, in a phase-locked loop (PLL) with a conventional second-order passive-loop filter (PLF), PLL output frequency range is restricted by the compliance range of the charge pump output voltage (VCP) even though...
High-speed differential interfaces implementing specific solutions for low-power consumption and low-EMI disturbances are vastly used in mobile platforms. In these devices, the slew rate is suitably controlled, the communication scheme alternates data-bursts followed by power-saving states, the voltage swing and the common-mode level are reduced. To achieve these targets, a key role in voltage-mode...
The increase in the use of electronic portable devices in the market has led to the use of the DC-DC converters. In different types of the DC-DC Converter the more efficient one to be chosen is the Buck converter. In the power electronics industry there are many types of voltage regulators and DC-DC Converters. But as concern with the VLSI Design logic the main aim is to reduce the area and the power...
This paper will present an RMS based ripple sensor for testing of fully integrated voltage regulators. A DC signal which is proportional to the input ripple amplitude is generated. Final digital pass/fail signal is obtained with a clocked comparator. The sensor can detect a peak-to-peak ripple voltage of up to 50 millivolts on the 1.2 volts supply rail and has 220 MHz bandwidth. The sensor is designed...
In this paper, we describe a fully-integrated digitally-controlled low-dropout regulator (LDO) with dual-loop architecture, providing core voltage to an ultra-low-power microcontroller (MCU). The fine-grained loop dynamically modulates the active-mode LDO drive-strength using the MCU power-modes information for a maximum load current of 6mA, thereby improving the active-mode current efficiency. The...
In this study, a Wireless Power Transfer (WPT) system design on active silicon (Si) interposer for low voltage applications in 3D-IC is proposed. The proposed WPT system includes magnetically coupled coils, a full-bridge rectifier, and a voltage regulator. In order to validate the proposed system, we first design all of the system components. First, we design a three dimensional helix-type transmitter...
This article aims to present the design of a 4.5- V, 450-mA low drop-out (LDO) voltage linear regulator based on a two-stage cascoded operational transconductance amplifier (OTA) as error amplifier. The aforementioned two-stage OTA is designed with cascoded current mirroring technique to boost up the output impedance. The proposed OTA has a DC gain of 101 dB under no load condition. The designed reference...
A highly digital quadrature clock generator using a digital DLL that employs a digital loop filter and digitally-calibrated replica-based regulator is presented. The proposed DLL combines the advantages of both analog and digital loop-filters of conventional architectures to implement a wide-range, energy efficient, highly digital, and high performance quadrature clock generator. To suppress supply-noise,...
This paper presents a high-efficiency rectifier and low-dropout regulator (LDO) for a body area network. The rectifier receives signal for energy harvesting, and the LDO is employed to generate stable supply voltage. The rectifier uses bootstrapped capacitors and adaptive voltage controller to reduce threshold voltage and to improve further the power conversion efficiency (PCE). The LDO combines voltage...
This paper describes the architecture of a Power Management system for low-frequency passive RFID tags in a standard CMOS 0.18um technology. Passive tags have no internal power source but use the incoming RF energy transmitted by a reader to power all the circuitry inside them via a rectifier. Due to the wide variation of the rectified voltage, two stages of regulation are required: a shunt regulator...
This article shows the design of an on-chip CMOS linear-assisted DC-DC regulator. It results a good alternative topology to classic switching DC-DC power converters. In the presented technique, an auxiliary linear regulator is used to cancel the output voltage ripple and provides fast responses for load and line variations. On the other hand, a switching converter, connected in parallel, allows supplying...
This paper presents a low-dropout voltage regulator capable of delivering ±5 mA to the load with a quiescent current as low as 8 µA and a temperature coefficient equal to 7-ppm/°C, over a temperature range from −40 °C to +125 °C. The output voltage can be either 1.25 V or 1.8 V, while the input voltage can range from 1.8 V to 5.5 V. The bipolar output current is achieved by using a class-AB error...
A low dropout linear regulator comprising a MESFET pass transistor with an integrated CMOS error amplifier has been fabricated using a commercial 45nm SOI foundry. Good regulation is observed after irradiation to 1 Mrad(Si).
In this work, a multi-layer hierarchical distributed power delivery architecture for TSV 3DIC is proposed. By decoupling global and local power networks, the proposed power delivery architecture can be flexibly configured for different power requests. The decoupled power architectures can also greatly reduce the required decoupling capacitor sizes for voltage stabilization. Meanwhile, a multi-threshold...
This paper presents a low drop-out voltage regulator (LDO) suitable for input voltages twice the nominal operating voltage of the CMOS technology. High GBW and good DC accuracy in line and load regulation is achieved by using 3-stage error amplifiers. Two feedback loops are used to improve stability. High voltage compatibility is established by stacking two pass transistors. The first pass transistor...
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