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The paper concerns ferroelectric film features and their application in the field of memory ICs design. The results of FRAM test memory cells irradiation are shown and discussed. The current responses of the memory cells are presented as well as the calculated value of polarization The measurement complex used during the experiment is described.
In this paper, a versatile, re-programmable, current-input bioinstrumentation board is presented for electrochemical amperometric measurements. The proposed instrument has been fabricated on a six layer printed circuit board (PCB) and exploits dual switched-capacitor (SC) integration and sample-and-hold (SH) techniques. It comprises off-the-shelf switch and amplifier ICs and a commercially available...
With the growing adoption of electrified transportation and need for active storage in the electrical grid, electrochemical energy storage has become increasingly important. Past electrochemical management systems have suffered from low efficiency, limited functionality, and extreme cost sensitivity in storage applications [1]. Most battery management systems used for state-of-charge (SOC) equalization...
This paper investigates the operation of a bi-directional interleaved converter. The DC-DC converter can operate both as a buck and a boost converter as per operating requirements. Design methodology for the converter operating in either modes is presented in detail. Analysis on duty cycle limits, voltage conversion ratios and efficiency including non-idealities of the converter is presented. Extensive...
Investigations on direct current (DC) circuit breakers (CB) become more and more important. The major challenges of DC CBs compared to alternating current (AC) CBs are the lack of a natural current zero and the required absorption of the energy in the system. With an artificial current zero created by a parallel commutation path a vacuum interrupter (VI) can handle this duty. The commutation path...
In this paper we present the realisation of an HVDC experimental platform with modular multilevel converter and two-level voltage source converter. Local control strategies for both converters are outlined in detail. The experimental platform is configured in such a way that the power-flow is controlled by the modular multilevel converter, while the DC voltage is regulated by the two-level voltage...
The microelectronics industry seeks screening tools that can be used to verify the origin of and track integrated circuits (ICs) throughout their lifecycle. Embedded circuits that measure process variation of an IC are well known. This paper adds to previous work using these circuits for studying manufacturer characteristics on final product ICs, particularly for the purpose of developing and verifying...
This paper presents a new control method for boost DC/DC converters combined with voltage source inverter systems to minimize the DC-link capacitor-current RMS value. The examined converter system consists of a multi-phase boost converter and a three-phase inverter with common DC-link capacitor. A general analytical expression for the DC-link capacitor-current RMS value is derived, which allows to...
At SCL, an automated system is developed to calibrate DC current sources and meters, including electrometers and femto-ammeters, from 100 pico-amperes (pA) down to 100 femto-amperes (fA). The system comprises an in-house developed control software, a ramping voltage generation circuitry and a precision air capacitor.
The reliability of power supply is deeply affected by the grid neutral grounding mode and the voltage level. This paper explains basic theories, mode and rules of neutral grounding, then summaries the necessity of arc-suppression coil changing because of 66kV grid transmission line expanding and how to achieve scientific and reasonable tuning principle.
This paper presents a measurement-based data-processing approach to obtain parameters of multiple current components through a bulk decoupling capacitor for power integrity studies. A lab-made low-cost current probe is developed to measure the induced voltage due to the time-varying switching current. Then, a post data-processing procedure is introduced to separate and obtain the parameters of multiple...
An improved definition of target impedance is proposed in this paper, which is derived from the time-domain waveforms of the IC transient current and the allowable voltage fluctuation. The proposed target impedance removes the unnecessary constraint in the original definition and allows for more cost-effective power distribution network (PDN) designs for consumer electronic products. A measurement...
Several control strategies have been proposed to deal with the problems of UPS feeding nonlinear loads. To ensure stability and fast response, current components on the LC filter are often used as control variables. Theses currents can be very noisy and unacceptable to work as an stabilization schema. A procedure to deal with measurement problem is developed and shown to be effective. Both simulations...
We examine the differential power analysis attack (DPA) on a pipelined FPGA implementation of AES when decoupling capacitors are in the circuit. In a recent work, researchers pointed out the use of the decoupling capacitors is inevitable for the encryption hardware operating at high clock frequencies. Also, use of the decoupling capacitance is advisable to protect the cryptographic algorithms against...
Paper deals with multifunctional second order electronically tunable filter in current mode using commercially available current conveyors. Electronic tuning, adjusting quality factor, sensitivities and tolerance analysis are discussed. Theoretical results and simulations are compared with experimental measurement.
This paper describes a comparative analysis between two topologies of operational amplifiers to design a 40 MS/s 12-bit pipeline analog to digital converter (ADC). The analysis includes AC and transient simulation to select the proper topology. This ADC is implemented in a 0.35 mum AMS CMOS technology with 3.3 V single power supply. The capacitors and selected operational amplifiers were scaled for...
Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier topology. This paper discusses the design and implementation of high fidelity audio class D using sliding mode control scheme. This design method proves to be a cost effective solution for industrial...
Predicting methods of common mode radiated emission of power bus structure have been investigated. Transient current flows at the power supply terminal was assumed to an exciting source, and the power bus consisted of power and ground planes was assumed to work as antenna of common mode radiation. Two simulation approaches were studied: one is a time-domain response-based approach, and another one...
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