The minimum supply voltage for implementing a typical bandgap reference is usually over 1.8 V. This mainly due to the limited input common-mode range of opamp used in reference. In this work, low-voltage using transimpedance amplifier that does not have limitation proposed and some design considerations technique are briefly discussed. Based on technique, 1.2-V was implemented 1.2-/spl mu/m CMOS process (V/sub TN//spl ap/0.53 V V/sub TP//spl ap/-0.91 V) with bipolar option. variations output...

DC/DC converters play an important role in electrical systems. The anomalous state of a dc/dc converter has major impact on the operation back-end components and entire system. To effectively recognize state, particularly for with unknown circuit structures, online anomaly detection method that involves statistical feature estimation using Gaussian process regression (GPR) genetic algorithm (GA) is proposed. In proposed method, normal output range built upon signal GPR, seven features are...

DC–DC converters play an important role in electrical systems. The fault state of a converter has major impact on the operation back‐end components and entire system. Therefore, diagnosis is very necessary when early stage. It can decrease likelihood happening serious faults that may result enormous economic loss. To effectively diagnose incipient converters, method based sensitive features proposed. Firstly, for each type fault, this study obtains statistical time domain wavelet analysis...

For a low voltage bandgap reference design, there is tradeoff between the supply and performance of in terms untrimmed accuracy 1/f noise performance. In this paper, application chopper stabilizing technique proposed to address tradeoff. Over five times improvement were demonstrated through fabricated 0.8 /spl mu/m CMOS process.

In the actual fault diagnosis process of an analog circuit, there is often a problem due to lack samples, leading low-accuracy diagnostic models. Therefore, using positive samples that are easy obtain establish models became research hotspot in field circuit diagnosis. This paper proposes method based on Support Vector Data Description (SVDD) and Dempster-Shafer evidence theory (D-S theory) for modular circuit. Firstly, principle module partition proposed divide under test, output port each...

A novel method of generating multi-frequency test stimuli for incipient faults is presented to improve the fault detection accuracy analog circuits. This paper analyzes primary cause low and indicates that high aliasing between response normal seriously impairs recognition ability classifiers. Therefore, this builds an measuring model (AMM) generate set faults. The principle part AMM algorithm (AMA), which uses as pivotal index evaluate frequency. frequencies with smaller will be selected....

Abstract The traditional identification methods of direct current‐to‐direct current (DC–DC) converters usually consider the common situation where training and testing sets have same input voltage. In real‐world applications, actual voltage may fluctuate beyond its original value, thus negatively affecting parameter accuracy. Therefore, this paper presents a method under fluctuating voltages. Firstly, to increase accuracy, proposes coefficient variation extract key features from all time‐...

Sigma-delta ACD has two main parts: analog modulator and digital filter, the performance of determines sigma-delta ADC, so design is very important.The paper introduces principle AD with high accuracy applied over sampling technique, noise shaping technique multi-bit quantizer technique.Determining scheme modulator-three bits three orders CIFF(Cascade integrators, feed forward form) structure, it makes behavior level verification for this by Simulink tool in MATLAB.The simulation result...

This paper describes an area-efficient, low-voltage, low-power phase interpolator for clock recovery in a 3.125/2.5 Gbps dual mode serial link application. It has been implemented both 0.15 /spl mu/m and 0.13 digital CMOS processes. occupies 0.02 mm/sup 2/ dissipates less than 10 mW The measurement results from the transceiver show BER<10/sup -14/ with presence of plusmn/200 ppm frequency offset 0.65 UI/sub p-p/ combined deterministic, random sinusoidal jitter.

Sigma-delta modulation is a superior technique to realize A/D converter with high resolution. This paper proposes new method design low-cost, high-performance and third-order sigma-delta modulator whose structure three-bit quantization CIFF (cascade of integrators, feed forward form). It combines the high-speed data processing ability FPGA achieve accuracy ADC. The diagram each part in circuit given, system modeling simulations are carried out this paper. results show that, multi-bit has higher SNR.

Existing few-shot segmentation approaches basically adopt the idea of comparing semantic prototype vector query image and support images, then obtaining result. However, recent studies have shown that a single feature in map cannot accurately represent pixel-level categories, thus leading to poor object boundary ambiguity. To address this common problem, we propose novel contour-aware network (CTANet) for paper. Unlike usual practice classifying each pixel separately, CTANet regards all...

Generating high-quality images that conform to the semantics of captions has numerous potential applications. However, text-to-image generation is a challenging task due its cross-modality nature. Current generative models are typically unstable, meaning complex sentences can result in poor image quality. In this paper, we propose novel model bridge domain gap arising from sentence complexity achieve stable generation. Our includes two key modules, attribute extraction module and fusion...

For practical implementation of a typical bandgap reference, the minimum supply voltage is usually over 1.8 V mainly due to limited input common mode range opamp used in reference. In this paper, low reference using transimpedance amplifier that does not have limitation proposed. Based on technique, 1.2 was implemented /spl mu/m CMOS process (V/sub TN//spl ap/0.53 and V/sub TP//spl ap/-0.91 V) with bipolar option. The variations output temperature (0/spl deg/C/spl les/T/spl les/100/spl...

Switching-mode power module (SMPM) plays an important role in the electrical system. The reliability of SMPM has decisive effect on working state back-end components even entire To identify anomaly effectively, paper proposes online detection method using statistical property features comparison and Gaussian Process Regression (GPR), especially for with unknown circuit structure. Firstly, describing uncertainty evaluation prediction, (GPR) is adopted to perform prediction normal output range...

With the rapid development of electronic technology, systems are widely used in various fields, and reliability requirement for is also increasing. Many test diagnosis methods have been proposed. However, few can be to recognize intermediate anomaly state between normal fault state. To solve above problem, this paper presents an detection method based on Support Vector Data Description (SVDD) analog circuits. Simulation experiments verified effectiveness.

Phase is a fundamental electrical parameter, at present the common method to measure phase pulse counting method. But interference and DC bias in measurement process will reduce accuracy. This paper provides new data processing with anti ability based on digital logic technology, it designs special event capture storage circuit by FPGA. Its basic principle recording zero-crossing point time series of measured signal or detail. Then method, takes mean value jitter moments as equivalent stage...

When monitoring the power network, it needs multiple channels to collect data synchronously, common method requires solve synchronous sample problem, and analog circuit transmission are complex. So paper designs three phase network signal by new A/D conversion chip with character, can ensure synchronism of collection, decrease hardware cost. It also system logic resources in FPGA. For collected data, FFT(Fast Fourier Transform) IP core is used process it, result FFT module compared that...

With the increasing demand of high reliability and safety modern electric devices, failure prediction becomes more important since it is efficient to increase reduce downtime cost. A novel method for analog circuits proposed in this paper. Firstly, output waveforms time domain initial state degradation states are extracted, then particle filter algorithm implemented estimate changes according principles noise estimation based on Grey Theory obtain reasonable fault indicators from complete...

A novel approach for incipient fault detection in analog circuit is presented this paper. testing stimulus generating method has been proposed, based on statistical distribution characteristic of response signal both normal state and state, using compactness index to indicate the deviation between so test stimulus, which can furthest stimulate weak features faults be selected according measuring algorithm. After wavelet transform signal, feature extraction, one-class classifier Support...

The paper aims at the problem of low incipient fault detection accuracy in analog circuits, and a method based on deviation synthesis is proposed to solve this problem. In method, characteristic slope frequency response curves normal state are synthesized each test point, synthetic taken as evaluation index select frequencies for circuit. Furthermore, optimal set obtained accurately by using Greedy algorithm remove redundant frequencies. stimuli not only can improve circuit, but also reduce...