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Pipelined analog-to-digital converters (ADCs) are sensitive to distortion introduced by the residue amplifiers in their first few stages. This paper presents a background self-calibration technique that can correct linear errors in the interstage amplifier of pipeline ADCs. Pseudo-random sequence and stage redundancy in pipelined architecture are used to measure opamp gain errors. With this calibration...
This paper deals with a new family of quasi-Z-source converters applying to AC/AC power conversion called single-phase quasi-Z-source AC/AC converter (qZSAC). The proposed qZSAC inherits all the advantages of the traditional single-phase Z-source AC/AC converter (ZSAC), which can realize buck-boost, reversing or maintaining phase angle. In addition, the proposed qZSAC has the unique features; namely...
In infrared focal plane arrays (IRFPA) applications, variable gain of capacitor feedback transimpedance amplifier (CTIA) cells in readout integrated circuit (ROIC) is required to achieve a widely dynamic range and keep CTIA cells away from saturation. Selectable integration capacitors CTIA cell and a counter-based novel timing control circuit are proposed and presented in this paper. With the two...
This paper reports the electrical design procedure, selection of main components, and optimal arrangement design of a pulsed power system (PPS). It also introduces some preliminary test results obtained by applying the PPS to various load conditions.
Switched converter (SC) DC/DC converters are new prototype of DC/DC Conversion technology. Since switched capacitor can be integrated into a power IC chip, consequently, these converters have small size and high power density. Switched capacitor can be used in voltage-lift technique to construct DC/DC converters. The clue is that for the converters operating in input current discontinuous mode (ICDM)...
Switched capacitor DC/DC converters are new prototype of DC/DC Conversion technology. Since switched capacitor can be integrated into a power IC chip, consequently, these converters have small size and high power density. Switched capacitor can be used in voltage-lift technique to construct DC/DC converters. The clue is that for the converters operating in discontinuous input current mode (DICM) the...
In this paper, we present a histogram-based two-phase calibration technique for capacitor mismatch and comparator offset of 1-bit/stage pipelined Analog-to-Digital Converters (ADCs). In the first phase, it calibrates the missing decision levels by capacitor resizing. Unlike previous works which require large capacitor arrays, only few switches are added to the circuit. The second phase performs missing...
The total harmonic distortion (THD) monitoring is an important challenge in the industrial and office building environment. The IEEE-519 and IEC 61000-3 standards limit the individual harmonics current as well as the THD for nonlinear power electronic loads. A harmonic current distortion comparative study of a classical three-phase rectifier diode (TPRD) and rectifier with near sinusoidal currents...
With technology scaling, vulnerability to soft errors in random logic is increasing. There is a need for on-line error detection and protection for logic gates even at sea level. The error checker is the key element for an on-line detection mechanism. We compare three different checkers for error detection from the point of view of area, power and false error detection rates. We find that the double...
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