LUJÁN MARTÍNEZ , Clara Isabel

A new compensation method for low dropout (LDO) voltage regulators is proposed, where the series resistor of the conventional Miller compensation changes with the load current to track the variations in the first non‐dominant pole.

A new frequency compensation technique for output buffers able to manage a wide range of loads, is proposed in this paper. To improve the stability, this technique implements a variable zero nulling resistor in a classical Miller compensation. A replica circuit senses the operating region of the output stage and generates the required value of...

This paper presents a methodology to design a wideband radio frequency variable gain amplifier (RF-VGA) in a low-cost SiGe BiCMOS 0.35 μm process. The circuit uses two Class A amplifiers based on second-generation controlled current conveyors (CCCII). The main feature of this circuit is the wideband input match along with a reduced NF (5.5–9.6...

Flicker noise and distortion are the main limitations in biomedical applications, especially for Switched Capacitor implementations, where the flicker noise is folded into the signal band. To remove the flicker noise and increase the linearity, the Pseudo-Pseudo Differential (P2D) technique has been proposed, where a single-ended signal is...

A new internally compensated low drop-out voltage regulator based on the cascoded flipped voltage follower is presented in this paper. Adaptive biasing current and fast charging/discharging paths have been added to rapidly charge and discharge the parasitic capacitance of the pass transistor gate, thus improving the transient response....

An ultra-low power Internally Compensated Low- Dropout (IC-LDO) regulator with a quiescent current consumption lower than 600 nA is proposed. It is based on the classical IC-LDO topology, which has been modified to include a class AB buffer between the output of the error amplifier and the gate of the pass transistor (MPASS). This way, a fast...

In this paper, an internally compensated low dropout (LDO) voltage regulator based on the Flipped Voltage Follower (FVF) is proposed. By means of capacitive coupling and dynamic biasing, the transient response to both load and line variations is enhanced. The proposed circuit has been designed and fabricated in a standard 0.5 mm CMOS...

An efficient clocked class AB fully differential rail to rail differential difference amplifier is introduced. It is based on a two stage operational amplifier architecture with resistive local common mode feedback, floating gate transistors in the input stages and in the common mode feedback network. Its application in fully differential rail...

Wireless communications are one of the major successes of the engineering over the past two decades. The progress made in this area has not only produced a huge technological growth, but also a great impact at social and economical level. In fact, the possibility of being connected anywhere at any time has radically changed people habits. The...

This paper presents a BiCMOS low-noise amplifier (LNA) operating at G-band (140 to 220 GHz) that is robust against harsh operation conditions, namely large temperature variations and radiation exposure. A SiGe technology (IHP's 0.13- μ m SG13G2) has been used for the amplifier design, due to its suitability for millimeter wave (mmW) frequencies...

Low power and low voltage are key in modern design. The quasi-floating gate (QFG) has proven to be an adequate choice in numerous applications. However, so far, its use has not spread in high-radiation environments because of the lack of studies on the performance of this technique under radiation. This work addresses the effect of ionizing...

Depleted Monolithic Active Pixel Sensors (DMAPSs) are foreseen as an interesting choice for future high-energy physics experiments, mainly because of the reduced fabrication costs. However, they generally offer limited time resolution due to the stringent requirements of area and power consumption imposed by the targeted spatial resolution....

This paper focuses in the development of an information platform for rivers and integrated navigation aid system in waterways. The proposed system will not only offer vessel traffic services (VTS) and other RIS basic services but also those advanced and customized services of interest for the Port of Seville. This system, eRIO, is being...

This paper focuses in the optimization of intermodal transport by the development of a freight geolocation and telecontrol platform for intermodal transport. This system, Cooperative Unitized Tracking System (CUTS), is being developed under the project TECNOPORT2025, which is an initiative of the Port Authority of Seville (PAS), co-funded by...